exactmatch =
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There are 2916 matches found
| Name | BBrefID | Year | Span | Games | Team | League | Location |
| Charlie Abbey | abbey-001cha | 1891 | 4/17-5/31 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Charlie Abbey | abbey-001cha | 1891 | 8/2-10/4 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Dan Abbott | abbott001dan | 1891 | 5/10- | 4+ g. | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI |
| Dan Abbott | abbott001dan | 1891 | 10+ g. | Peoria Distillers | Northwestern League | Peoria, IL | |
| Dan Abbott | abbott001dan | 1891 | -7/25 | 3+ g. | Terre Haute Hottentots | Northwestern League | Terre Haute, IN |
| Fred Abbott | abbott002har | 1891 | Marion | InSt? | Marion, IN | ||
| Adams | adams-090--- | 1891 | Chicago Whitings | Chicago City League | Chicago, IL | ||
| George Adams | adams-006geo | 1891 | Ishpeming | Upper Peninsula League | Ishpeming, MI | ||
| James Adams | adams-005jam | 1891 | Fort Scott | Southwest League | Fort Scott, KS | ||
| Jim Adams | adams-001jim | 1891 | Carthage | Southwest League | Carthage, MO | ||
| Jim Adams | adams-001jim | 1891 | 8/13-8/19 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Arthur Agan | agan--001art | 1891 | 5/14-9/8 | Olean | New York-Pennsylvania League | Olean, NY | |
| Gus Alberts | albert001gus | 1891 | 4/16-8/3 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| Gus Alberts | albert001gus | 1891 | 8/18-9/22 | 12 g. | Milwaukee | American Association | Milwaukee, WI |
| Albright | 1891 | Wheeling Eclipse | Independent | Wheeling, WV | |||
| William Alfonson | alfons001wil | 1891 | +5/22- | Norwich | Connecticut State League | Norwich, CT | |
| Bob Allen | allen-001bob | 1891 | 118 g. | Philadelphia | National League | Philadelphia, PA | |
| Charles Allen | allen-008cha | 1891 | 6/10-7/11 | Woonsocket | New England League | Woonsocket, RI | |
| James Allen | allen-015jam | 1891 | 5/12-7/19 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| James Allen | allen-015jam | 1891 | 8/1-8/4 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| James Allen | allen-015jam | 1891 | 8/11-9/1 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| James Allen | allen-015jam | 1891 | +8/12-8/24+ | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Myron Allen | allen-001myr | 1891 | 5/29-9/9 | Olean | New York-Pennsylvania League | Olean, NY | |
| Owen Altman | altman001owe | 1891 | 6/26 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| Billy Alvord | alvord001bil | 1891 | 13 g. | Cleveland | National League | Cleveland, OH | |
| Billy Alvord | alvord001bil | 1891 | 81 g. | Washington | American Association | Washington, DC | |
| Robert Ammerman | ammerm001r-- | 1891 | Danville | Independent | Danville, PA | ||
| Doc Amole | amole-001doc | 1891 | Coatesville PA | Independent | Coatesville, PA | ||
| Dave Anderson | anders007dav | 1891 | 4/25-7/24 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Jay Anderson | anders002jay | 1891 | ?-9/13 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Varney Anderson | anders001var | 1891 | no g. | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Varney Anderson | anders001var | 1891 | Lebanon Cedars | Independent | Lebanon, PA | ||
| Varney Anderson | anders001var | 1891 | Canton | Independent | Canton, OH | ||
| Andrews | andrew006--- | 1891 | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | ||
| Ed Andrews | andrew001ed- | 1891 | 83 g. | Cincinnati | American Association | Cincinnati, OH | |
| Jim Andrews | andrew003jim | 1891 | Chicago Whitings | Chicago City League | Chicago, IL | ||
| Wallace Andrews | andrew003wal | 1891 | Memphis | Independent | Memphis, TN | ||
| Wyman Andrus | andrus001wym | 1891 | 4/30-8/1 | Manchester Amskoegs | New England League | Manchester, NH | |
| Wyman Andrus | andrus001wym | 1891 | 8/15-9/9 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Ankeney | ankene001--- | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Bill Annis | annis-001bil | 1891 | 4/25-6/27 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Bill Annis | annis-001bil | 1891 | 7/6-7/17 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Spencer Ansell | ansell001spe | 1891 | 4/18- | Williamsport Demorest | Independent | Williamsport, PA | |
| Cap Anson | anson-001cap | 1891 | 136 g. | Chicago | National League | Chicago, IL | |
| Joe Ardner | ardner001joe | 1891 | 4/15-7/19 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Joe Ardner | ardner001joe | 1891 | 8/7-9/9 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Louie Arguello | arguel001lou | 1891 | 10/10 | Oakland Colonels | California League | Oakland, CA | |
| Billy Armitage | armita001bil | 1891 | 5/26- | 84 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI |
| Billy Armitage | armita001bil | 1891 | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI | ||
| Bill Armour | armour001wil | 1891 | 5/14-8/15 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Bill Armour | armour001wil | 1891 | 16 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Frank Armstrong | armstr001fra | 1891 | 6/18-7/26 | Sacramento Senators | California League | Sacramento, CA | |
| Tug Arundel | arunde001tug | 1891 | 5/9-6/4+ | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Charlie Atherton | athert001cha | 1891-92 | Penn State | College | , | ||
| William Augustine | august001w-- | 1891 | Ishpeming | Upper Peninsula League | Ishpeming, MI | ||
| William Augustine | august001w-- | 1891 | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | ||
| William Augustine | august001w-- | 1891 | 8/23-9/1 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Frank Austin | austin004fra | 1891 | Meadville | New York-Pennsylvania League | Meadville, NY | ||
| Jake Aydelott | aydelo001jak | 1891 | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | ||
| Ayers | ayers-006--- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| Louis Bacon | bacon-001jam | 1891 | 4/30-8/1 | Manchester Amskoegs | New England League | Manchester, NH | |
| Herman Bader | bader-001her | 1891 | 4/25-9/26 | Albany Senators | Eastern Association | Albany, NY | |
| Bailey | bailey012--- | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| King Bailey | bailey001kin | 1891 | 5/11 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| King Bailey | bailey001kin | 1891 | 5/27-6/5 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Timothy Bailey | bailey003tim | 1891 | 4/30-9/2 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Baker | 1891 | 7/24 | Syracuse Stars | Eastern Association | Syracuse, NY | ||
| C. Baker | baker-000c-- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| Kirtley Baker | baker-001kir | 1891 | 5/1-6/4 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Kirtley Baker | baker-001kir | 1891 | 7/9-9/2 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Norm Baker | baker-001nor | 1891 | 4/22-8/14 | Omaha Lambs | Western Association | Omaha, NE | |
| Jersey Bakley | bakely001jer | 1891 | 13 g. | Washington | American Association | Washington, DC | |
| Jersey Bakley | bakely001jer | 1891 | 8 g. | Baltimore | American Association | Baltimore, MD | |
| Kid Baldwin | baldwi001kid | 1891 | 4/17-6/16 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Kid Baldwin | baldwi001kid | 1891 | 6/18-8/13 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Kid Baldwin | baldwi001kid | 1891 | 8/30-10/4 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Mark Baldwin | baldwi001mar | 1891 | 53 g. | Pittsburgh | National League | Pittsburgh, PA | |
| Ball | ball--018--- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| Louis Balsz | balsz-002lou | 1891 | 6/5 | Sacramento Senators | California League | Sacramento, CA | |
| Louis Balsz | balsz-002lou | 1891 | 6/13-10/24 | Oakland Colonels | California League | Oakland, CA | |
| Harry Bamberger | bamber001hen | 1891 | 4/30-6/16 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Del Banks | banks-001del | 1891 | 5/19-5/30 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Del Banks | banks-001del | 1891 | +6/17+ | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Jim Banning | bannin001jim | 1891 | Fargo | Red River | Fargo, ND | ||
| Jimmy Bannon | bannon001jam | 1891 | 6/24-7/17 | Portland | New England League | Portland, ME | |
| Jimmy Bannon | bannon001jam | 1891 | 6/27 | Lynn | New England League | Lynn, MA | |
| Tom Bannon | bannon001tho | 1891 | 6/24 | Portland | New England League | Portland, ME | |
| Tom Bannon | bannon001tho | 1891 | 6/27 | Lynn | New England League | Lynn, MA | |
| John Barnes | barnes003joh | 1891 | 4/15-10/4 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Billy Barnie | barnie001bil | 1891 | 139 g. | Baltimore | American Association | Baltimore, MD | |
| Bob Barr | barr--001bob | 1891 | 4/25-8/7 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Bob Barr | barr--001bob | 1891 | -9/12 | 5 g. | New York | National League | New York, NY |
| Barrett | barret004--- | 1891 | +5/19- | Bristol-Plainville | Connecticut State League | Bristol, CT | |
| F. Barrett | 1891 | Chicago Franklins | Chicago City League | Chicago, IL | |||
| F. Barrett | barret000f-- | 1891 | Chicago Whitings | Chicago City League | Chicago, IL | ||
| Romeo Barry | barry-001rom | 1891 | 8/8-8/9 | Sacramento Senators | California League | Sacramento, CA | |
| Dick Bartell | bartel001dic | 1891 | Chicago Franklins | Chicago City League | Chicago, IL | ||
| George Barton | 1891 | Cuban Giants | Independent | Cuban, | |||
| Charlie Bartson | bartso001cha | 1891 | 5/16-6/1 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Charlie Bartson | bartso001cha | 1891 | 7/15-7/23 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Charlie Bartson | bartso001cha | 1891 | 8/8-8/16 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Charley Bassett | basset001cha | 1891 | 130 g. | New York | National League | New York, NY | |
| Charlie Bastian | bastia001cha | 1891 | 1 g. | Cincinnati | American Association | Cincinnati, OH | |
| Charlie Bastian | bastia001cha | 1891 | 1 g. | Philadelphia | National League | Philadelphia, PA | |
| Bater | 1891 | 26 g. | Aurora Maroons | Illinois-Iowa League | Aurora, IL | ||
| Bater | 1891 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |||
| Joe Battin | battin001joe | 1891 | 4/25-5/25 | Umpire | EastA | , | |
| Joe Battin | battin001joe | 1891 | MLB Umpire | National League | , | ||
| Joe Battin | battin001joe | 1891 | 8/25 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Harry Baumgardner | baumga002har | 1891 | Cincinnati Shamrocks | Independent | Cincinnati, OH | ||
| Clarence Bayne | bayne-001cla | 1891 | Girard College | Academy | , | ||
| Clarence Bayne | bayne-001cla | 1891 | Phil.-Bank Clerks | Amat | Philadelphia, PA | ||
| Clarence Bayne | bayne-001cla | 1891 | 7/15-8/29 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Roman Bays | bays--001rom | 1891 | 5/12 | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Alex Beam | beam--001ale | 1891 | 19 g. | Bay City | Northwestern League | Bay City, MI | |
| Ernie Beam | beam--001ale | 1891 | 19 g. | Bay City | Northwestern League | Bay City, MI | |
| Ernie Beam | beam--001ern | 1891 | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | ||
| Beane | beane-002--- | 1891 | 30 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Ollie Beard | beard-001oll | 1891 | -6/28 | 68 g. | Louisville | American Association | Louisville, KY |
| Ollie Beard | beard-001oll | 1891 | 8/6-9/13 | Denver Mountaineers | Western Association | Denver, CO | |
| Ed Beatin | beatin001ed- | 1891 | 5 g. | Cleveland | National League | Cleveland, OH | |
| Ben Beaumont | beaumo001ben | 1891 | Phil.-Tioga | Independent | Philadelphia, PA | ||
| Jake Beckley | beckle001jac | 1891 | 133 g. | Pittsburgh | National League | Pittsburgh, PA | |
| Ed Beecher | beeche001ed- | 1891 | 58 g. | Washington | American Association | Washington, DC | |
| Ed Beecher | beeche001ed- | 1891 | 16 g. | Philadelphia | American Association | Philadelphia, PA | |
| Philip Begy | begy--001phi | 1891 | 4/25-7/4 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Philip Begy | begy--001phi | 1891 | 6/2 | Olean | New York-Pennsylvania League | Olean, NY | |
| Behan | behan-003--- | 1891 | 20 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Frank Behne | behne-001fra | 1891 | 4/30-9/8 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| E.F. Belden | belden001e-- | 1891 | +5/7+ | Bristol-Plainville | Connecticut State League | Bristol, CT | |
| Bell | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | |||
| Charlie Bell | bell--003cha | 1891 | -7/27 | 10 g. | Louisville | American Association | Louisville, KY |
| Charlie Bell | bell--003cha | 1891 | 1 g. | Cincinnati | American Association | Cincinnati, OH | |
| Frank Bell | bell--002fra | 1891 | 5/2- | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT | |
| Frank Belt | belt--001fra | 1891 | Pittsburg | Southwest League | Pittsburg, KS | ||
| M. Belt | 1891 | Atchison | Independent | Atchison, KS | |||
| Charlie Bennett | bennet005cha | 1891 | 75 g. | Boston | National League | Boston, MA | |
| Harry Bennett | bennet003har | 1891 | 26 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Harry Bennett | bennet003har | 1891 | -7/25 | 4 g. | Fort Wayne | Northwestern League | Fort Wayne, IN |
| Edward Berchtold | bercht001edw | 1891 | 5/14-6/11 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Mike Berg | berg--001mik | 1891 | Weir City | Southwest League | Weir City, KS | ||
| Horner Berger | berger002a-- | 1891 | 4/15-7/29 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Horner Berger | berger002a-- | 1891 | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | ||
| Horner Berger | berger002a-- | 1891 | 8/11-8/13 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Tun Berger | berger001tun | 1891 | 43 g. | Pittsburgh | National League | Pittsburgh, PA | |
| Martin Berkery | berker002mar | 1891 | Meridian MS | Independent | Meridian, MS | ||
| Bob Berryhill | berryh001rob | 1891 | 71 g. | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI | |
| Berryman | 1891 | UppPenin | , | ||||
| Fred Betts | betts-001fre | 1891 | 4/18-7/4 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Fred Betts | betts-001fre | 1891 | 7/9-8/16 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Betz | betz--001--- | 1891 | Tacoma | Pacific Northwestern League | Tacoma, WA | ||
| Betz | betz--001--- | 1891 | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | ||
| Frank Beymer | beymer001fra | 1891 | Deadwood | Deadwood, SD | |||
| Fred Bickelhaupt | bickel001fre | 1891 | Hannibal | Independent | Hannibal, MO | ||
| Charles Bierbauer | bierba001cha | 1891 | 5/21-5/23 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Charles Bierbauer | bierba001cha | 1891 | +8/8 | Lock Haven PA | Independent | Lock Haven, PA | |
| Lou Bierbauer | bierba002lou | 1891 | 121 g. | Pittsburgh | National League | Pittsburgh, PA | |
| J. Binder | binder000j-- | 1891 | Chicago Brands | Chicago City League | Chicago, IL | ||
| Frank Bird | bird--001fra | 1891 | 4/30-8/1 | Worcester | New England League | Worcester, MA | |
| Mike Birmingham | birmin001mic | 1891 | 4/30-5/16+ | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Mike Birmingham | birmin001mic | 1891 | Marquette Undertakers | Upper Peninsula League | Marquette, WI | ||
| Mike Birmingham | birmin001mic | 1891 | 37 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Bishop | bishop022--- | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| Bill Bishop | bishop002bil | 1891 | 5/15-6/8 | Olean | New York-Pennsylvania League | Olean, NY | |
| Bob Black | black-002bob | 1891 | 5/20-6/1 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Fred Blanford | blanfo001f-- | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Joe Blanford | blanfo001joe | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Philip Blansfield | blansf001phi | 1891 | +5/22- | Norwich | Connecticut State League | Norwich, CT | |
| Harvey Blauvelt | blauve001hen | 1891 | 4/25-8/25 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Harvey Blauvelt | blauve001hen | 1891 | 9/9-11/22 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Ned Bligh | bligh-001ned | 1891 | NYC | s-p | New York, NY | ||
| Ned Bligh | bligh-001ned | 1891 | 7/1-7/25 | Troy Trojans | Eastern Association | Troy, NY | |
| Blodgett | blodge001--- | 1891 | +5/26- | Bristol-Plainville | Connecticut State League | Bristol, CT | |
| Charlie Bohn | bohn--001cha | 1891 | 6/6-6/9 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| A. Boisoker | 1891 | no g. | Fort Wayne | Northwestern League | Fort Wayne, IN | ||
| Paddy Bolan | bolan-001pat | 1891 | 5/11-7/28 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Paddy Bolan | bolan-001pat | 1891 | Oconto | Oconto, WI | |||
| Boland | boland007--- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| Daniel Boland | boland001dan | 1891 | 4/30-7/18+ | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| M. Bonan | 1891 | no g. | Minneapolis Millers | Western Association | Minneapolis, MN | ||
| Tommy Bond | bond--001tom | 1891 | 8/25 | MLB Umpire | American Association | , | |
| Frank Bonner | bonner001fra | 1891 | Plainfield NJ | Independent | Plainfield, NJ | ||
| Frank Bonner | bonner001fra | 1891 | Montgomery AL | Independent | Montgomery, AL | ||
| Bonney | bonney002--- | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| George Boone | boone-001geo | 1891 | 4/23-5/13 | 4 g. | Louisville | American Association | Louisville, KY |
| George Boone | boone-001geo | 1891 | -7/28 | 11 g. | Fort Wayne | Northwestern League | Fort Wayne, IN |
| Charles Booth | booth-001cha | 1891 | Will.-YMCA | Independent | Williamsport, PA | ||
| George Borchers | borche001geo | 1891 | 5/10-10/3 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| George Borchers | borche001geo | 1891 | 10/11-11/22 | Oakland Colonels | California League | Oakland, CA | |
| Ed Borland | borlan001ed- | 1891 | 49 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| George Boswick | boswic001geo | 1891 | Ishpeming | Upper Peninsula League | Ishpeming, MI | ||
| Billy Bottenus | botten001wil | 1891 | Buffalo Courier | Independent | Buffalo, NY | ||
| Billy Bottenus | botten001wil | 1891 | 5/9- | 14 g. | Bay City | Northwestern League | Bay City, MI |
| Billy Bottenus | botten001wil | 1891 | Detroit Wolverines | Northwestern League | Detroit, MI | ||
| Billy Bottenus | botten001wil | 1891 | 6/26-9/9 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Boutreur | boutre001--- | 1891 | 5/10- | 3 g. | Bay City | Northwestern League | Bay City, MI |
| W. S.? Bowers | 1891 | 6/9-9/14 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| Bill Bowman | bowman001bil | 1891 | 4/27-6/16 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Bill Bowman | bowman001bil | 1891 | 6/18-8/5 | 15 g. | Chicago | National League | Chicago, IL |
| Bill Bowman | bowman001bil | 1891 | 8/20-9/27 | Sacramento Senators | California League | Sacramento, CA | |
| C. W. Bowman | 1891 | Omah.-Cranes | Independent | Omaha, NE | |||
| Sumner Bowman | bowman001sum | 1891 | U. of Pennsylvania | College | , | ||
| Sumner Bowman | bowman001sum | 1891 | -10/5 | 14 g. | Philadelphia | American Association | Philadelphia, PA |
| Boyd | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | |||
| A. Boyd | boyd--000a-- | 1891 | Chicago Garden Citys | Chicago City League | Chicago, IL | ||
| Ben Boyd | boyd--001ben | 1891 | 5/2-5/14 | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT | |
| Ben Boyd | boyd--001ben | 1891 | 4/21-10/11 | Cuban Giants | Independent | Cuban, | |
| Ben Boyd | boyd--001ben | 1891 | 1 g. | Gorhams | Independent | New York, NY | |
| Frank Boyd | boyd--002fra | 1891 | 5/14-9/8 | Erie | New York-Pennsylvania League | Erie, PA | |
| Henry Boyle | boyle-001hen | 1891 | 6/?- | 4 g. | Terre Haute Hottentots | Northwestern League | Terre Haute, IN |
| Jack Boyle | boyle-001jac | 1891 | 121 g. | St. Louis Browns | American Association | St. Louis, MO | |
| George Brackett | bracke001geo | 1891 | 5/9-7/16 | Peoria Distillers | Northwestern League | Peoria, IL | |
| George Brackett | bracke001geo | 1891 | 7/20-7/30 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| George Brackett | bracke001geo | 1891 | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | ||
| Bradley | bradle027--- | 1891 | 8/13 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Michael Bradley | bradle004mic | 1891 | 5/1-7/22 | Lowell Lowells | New England League | Lowell, MA | |
| William Bradley | bradle005wil | 1891 | 5/18-5/29 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| William Bradley | bradle005wil | 1891 | 6/9-7/24 | Olean | New York-Pennsylvania League | Olean, NY | |
| William Bradley | bradle005wil | 1891 | 8/1-8/15 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Brady | brady-020--- | 1891 | 5/11- | 5 g. | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI |
| Charles Brady | brady-002cha | 1891 | 4/25-9/26 | Albany Senators | Eastern Association | Albany, NY | |
| James Brady | 1891 | no g. | Milwaukee Brewers | Western Association | Milwaukee, WI | ||
| James Brady | 1891 | Appleton Papermakers | Wisconsin State League | Appleton, WI | |||
| Thomas Braham | braham001tho | 1891 | 4/25-9/26 | Troy Trojans | Eastern Association | Troy, NY | |
| Howard Brandenburg | brande001how | 1891 | 4/30-6/16 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Howard Brandenburg | brande001how | 1891 | 6/19-7/22 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Howard Brandenburg | brande001how | 1891 | 38 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Bratt | bratt-001--- | 1891 | 5/17-5/21 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Billy Bray | bray--002wil | 1891 | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | ||
| Breckenridge | brecke003--- | 1891 | Chicago Brands | Chicago City League | Chicago, IL | ||
| Edwin Breckenridge | brecke002edw | 1891 | 5/12-7/29 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Edwin Breckenridge | brecke002edw | 1891 | 24 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Theodore Breitenstein | breite001the | 1891 | 4/28- | 6 g. | St. Louis Browns | American Association | St. Louis, MO |
| Theodore Breitenstein | breite001the | 1891 | St.L.-Reserves | Independent | St. Louis, MO | ||
| Theodore Breitenstein | breite001the | 1891 | 5/26-7/26 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Brennan | 1891 | WC-Brandywine | Independent | West Chester, PA | |||
| Jack Brennan | brenna002jac | 1891 | 5/29-6/7 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Jack Brennan | brenna002jac | 1891 | 7/4-9/13 | Denver Mountaineers | Western Association | Denver, CO | |
| Charles Briggs | briggs003cha | 1891 | 6/24-6/29 | Manchester Amskoegs | New England League | Manchester, NH | |
| George Briggs | briggs001geo | 1891 | +7/2-7/20+ | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Grant Briggs | briggs001gra | 1891 | 1 g. | Louisville | American Association | Louisville, KY | |
| Grant Briggs | briggs001gra | 1891 | 5/13-7/30 | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Grant Briggs | briggs001gra | 1891 | 27 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| George Bright | bright001geo | 1891 | Seattle | PugetSound | Seattle, WA | ||
| George Bright | bright001geo | 1891 | Tacoma | Pacific Northwestern League | Tacoma, WA | ||
| George Bright | bright001geo | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| George Bristow | bristo002geo | 1891 | Rockport IL | Independent | Rockport, IL | ||
| William Bristow | bristo001wil | 1891 | 5/6-6/28 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Albert Brittan | britta001alb | 1891 | 5/7-5/10 | San Jose Dukes | California League | San Jose, CA | |
| Albert Brittan | britta001alb | 1891 | 5/24-7/4 | Oakland Colonels | California League | Oakland, CA | |
| Albert Brittan | britta001alb | 1891 | 7/9-8/2 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Albert Brittan | britta001alb | 1891 | 8/13-8/16 | Sacramento Senators | California League | Sacramento, CA | |
| Albert Brittan | britta001alb | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| W. Brittan | britta001w-- | 1891 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | ||
| Joseph Broderick | broder001jos | 1891 | 4/30-5/1 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Joseph Broderick | broder001jos | 1891 | 51 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Steve Brodie | brodie001wal | 1891 | 133 g. | Boston | National League | Boston, MA | |
| Cal Broughton | brough001cal | 1891 | 5/1-7/23 | Lowell Lowells | New England League | Lowell, MA | |
| Dan Brouthers | brouth001den | 1891 | 130 g. | Boston | American Association | Boston, MA | |
| Jim Brouthers | brouth001jam | 1891 | 5/2-5/19 | Salem | New England League | Salem, MA | |
| Jim Brouthers | brouth001jam | 1891 | 5/26-6/5 | Waterbury | Connecticut State League | Waterbury, CT | |
| Brown | brown-196--- | 1891 | 5/9- | Bay City | Northwestern League | Bay City, MI | |
| Brown | brown-009--- | 1891 | -7/24 | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Charles Brown | bown--001cha | 1891 | 5/2-6/15 | Lynn | New England League | Lynn, MA | |
| Charles Brown | 1891 | +6/4 | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT | ||
| George Brown | brown-018geo | 1891 | +7/24-8/8+ | Reading | Independent | Reading, PA | |
| Marshall Brown | brown-007mar | 1891 | 4/25-9/23 | Albany Senators | Eastern Association | Albany, NY | |
| Tom Brown | brown-012tho | 1891 | 137 g. | Boston | American Association | Boston, MA | |
| William Brown | brown-027wil | 1891 | 115 g. | Philadelphia | National League | Philadelphia, PA | |
| William Browner | browne003wil | 1891 | 5/1-7/4 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Pete Browning | browni001pet | 1891 | 50 g. | Pittsburgh | National League | Pittsburgh, PA | |
| Pete Browning | browni001pet | 1891 | 55 g. | Cincinnati | National League | Cincinnati, OH | |
| Thomas Bruton | bruton001tho | 1891 | 4/25-5/4 | Albany Senators | Eastern Association | Albany, NY | |
| Thomas Bruton | bruton001tho | 1891 | 5/29-7/30 | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Tod Brynan | brynan001tod | 1891 | 5/26 | 1 g. | Boston | National League | Boston, MA |
| John Buchan | buchan003joh | 1891 | , | ||||
| Al Buckenberger | bucken001al- | 1891 | 4/16-9/13 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Buckley | buckle012--- | 1891 | 7/1 | Denver Mountaineers | Western Association | Denver, CO | |
| Dick Buckley | buckle001dic | 1891 | 75 g. | New York | National League | New York, NY | |
| John Buckley | buckle003joh | 1891 | 4/21 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| John Buckley | buckle003joh | 1891 | 5/27-6/29 | Peoria Distillers | Northwestern League | Peoria, IL | |
| Charlie Buffinton | buffin001cha | 1891 | 58 g. | Boston | American Association | Boston, MA | |
| Bullman | 1891 | Norwich | Connecticut State League | Norwich, CT | |||
| W. Bunell | 1891 | no g. | Salem | New England League | Salem, MA | ||
| Ernie Burch | burch-001ern | 1891 | 5/9-7/16 | Peoria Distillers | Northwestern League | Peoria, IL | |
| Bill Burdick | burdic001bil | 1891 | 5/16-6/1 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Jack Burdock | burdoc001jac | 1891 | 3 g. | Brooklyn | National League | Brooklyn, NY | |
| Jack Burdock | burdoc001jac | 1891 | 5/20-7/14 | Salem | New England League | Salem, MA | |
| Burke | burke-062--- | 1891 | 1 g. | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Dan Burke | burke-001dan | 1891 | 4/25-8/10 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| E.L. Burke | burke-002e-- | 1891 | 5/16-5/23 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| E.L. Burke | burke-002e-- | 1891 | 5/29-6/2 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Eddie Burke | burke-002edd | 1891 | 4/16-8/13 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| Eddie Burke | burke-002edd | 1891 | 8/18- | 35 g. | Milwaukee | American Association | Milwaukee, WI |
| Joe Burke | burke-004joe | 1891 | Knoxville Reds | Independent | Knoxville, TN | ||
| Joe Burke | burke-002joe | 1891 | 1 g. | Cincinnati | American Association | Cincinnati, OH | |
| Joe Burke | burke-002joe | 1891 | Chattanooga TN? | Independent | Chattanooga, TN | ||
| John Burke | burke-008joh | 1891 | 4/30-8/1 | Manchester Amskoegs | New England League | Manchester, NH | |
| John Burke | burke-009joh | 1891 | 5/9 | Lowell Lowells | New England League | Lowell, MA | |
| Jesse Burkett | burket001jes | 1891 | 4/16-8/18 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Jesse Burkett | burket001jes | 1891 | 40 g. | Cleveland | National League | Cleveland, OH | |
| Walter Burnham | burnha002wal | 1891 | 4/25-9/26 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Burns | burns-005--- | 1891 | +5/22- | Norwich | Connecticut State League | Norwich, CT | |
| Bobby Burns | burns-002oli | 1891 | 5/21 | Portland | New England League | Portland, ME | |
| Bobby Burns | burns-002oli | 1891 | 6/10-7/25 | Lewiston | New England League | Lewiston, ME | |
| C. J. Burns | 1891 | Utica? | Utica, NY | ||||
| J. Burns | 1891 | no g. | Albany Senators | Eastern Association | Albany, NY | ||
| James Burns | burns-016jam | 1891 | 5/4-5/7 | Troy Trojans | Eastern Association | Troy, NY | |
| Jim Burns | burns-001jim | 1891 | -5/22 | 20 g. | Washington | American Association | Washington, DC |
| Jim Burns | burns-001jim | 1891 | 6/13-9/13 | Denver Mountaineers | Western Association | Denver, CO | |
| John Burns | burns-017joh | 1891 | 6/1-7/18 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| John Burns | burns-017joh | 1891 | 7/31 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Pete Burns | burns-001pet | 1891 | Chicago Unions | Independent | Chicago, IL | ||
| Thomas Burns | burns-001oys | 1891 | 123 g. | Brooklyn | National League | Brooklyn, NY | |
| Tom Burns | burns-001tom | 1891 | 59 g. | Chicago | National League | Chicago, IL | |
| Louis Burquin | burqui001lou | 1891 | 40 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Frank Burrell | burrel001bus | 1891 | 5/2-7/18 | Salem | New England League | Salem, MA | |
| Frank Burrell | burrel001bus | 1891 | 8/1- | 15 g. | New York | National League | New York, NY |
| Harry Burrell | burrel001har | 1891 | 4/30-9/8 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Harry Burrell | burrel001har | 1891 | 9/13-10/3 | 8 g. | St. Louis Browns | American Association | St. Louis, MO |
| Burrows | burrow001--- | 1891 | Cornell Col. | College | , | ||
| Burrows | burrow001--- | 1891 | 7/16 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Clem Buschman | buschm001cle | 1891 | 4/30-7/29 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Doc Bushong | bushon001doc | 1891 | 4/27-5/15 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Doc Bushong | bushon001doc | 1891 | 5/30-7/9 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Doc Bushong | bushon001doc | 1891 | 7/28-8/15 | Umpire | EastA | , | |
| Frank Butler | butler003fra | 1891 | Atlanta | Independent | Atlanta, GA | ||
| Steve Butler | butler002ste | 1891 | San Antonio | Independent | San Antonio, TX | ||
| Charlie Cady | cady--001cha | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| Cafferty | caffer001--- | 1891 | +5/19- | Bristol-Plainville | Connecticut State League | Bristol, CT | |
| John Cahill | cahill006joh | 1891 | 6/4-6/14 | Oakland Colonels | California League | Oakland, CA | |
| Tom Cahill | cahill001tom | 1891 | 4/9- | 119 g. | Louisville | American Association | Louisville, KY |
| George Cain | cain--002geo | 1891 | 4/30-5/14 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| George Cain | cain--002geo | 1891 | 5/23 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| George Cain | cain--002geo | 1891 | 5/25-5/30 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| George Cain | cain--002geo | 1891 | 4/30- | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Calhoun | calhou011--- | 1891 | Chicago Garden Citys | Chicago City League | Chicago, IL | ||
| Charles H.? Calhoun | 1891 | Weir City | Southwest League | Weir City, KS | |||
| Will Calihan | caliha001wil | 1891 | -6/20 | 15 g. | Philadelphia | American Association | Philadelphia, PA |
| Will Calihan | caliha001wil | 1891 | 7/8-9/16 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Jimmy Callahan | callah002jam | 1891 | Pepperell MA | Amateur | Pepperell, MA | ||
| Eddie Callen | callen001edd | 1891 | 9/9-10/10 | Sacramento Senators | California League | Sacramento, CA | |
| Cam | cam---001--- | 1891 | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT | ||
| Kid Camp | camp--001kid | 1891 | 4/15-10/4 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Count Campau | campau001cha | 1891 | 4/25-9/26 | Troy Trojans | Eastern Association | Troy, NY | |
| Grant Campbell | 1891 | Chicago Unions | Independent | Chicago, IL | |||
| Hugh Campbell | campbe002hug | 1891 | Missoula | Independent | Missoula, MT | ||
| Joe Campbell | 1891 | Chicago Unions | Independent | Chicago, IL | |||
| Sal Campfield | campfi001sal | 1891 | 5/15-8/12 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| William Campion | campio002wil | 1891 | 4/16-8/13 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| William Campion | campio002wil | 1891 | 20 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Jim Canavan | canava001jim | 1891 | 4/8- | 101 g. | Cincinnati | American Association | Cincinnati, OH |
| Jim Canavan | canava001jim | 1891 | 35 g. | Milwaukee | American Association | Milwaukee, WI | |
| Joe Cantillon | cantil001jos | 1891 | 3/22-11/22 | Oakland Colonels | California League | Oakland, CA | |
| Joe Cantillon | cantil001jos | 1891 | 9/12-9/13 | Sacramento Senators | California League | Sacramento, CA | |
| Sim Cantrell | 1891 | 8/18-9/13 | Denver Mountaineers | Western Association | Denver, CO | ||
| E.N. Caplinger | caplin001e-- | 1891 | Aspen Sandens | Independent | Aspen, CO | ||
| E.N. Caplinger | caplin001e-- | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| Alexander Cardno | 1891 | Grand Forks ND | Independent | Grand Forks, ND | |||
| John Carey | carey-003joh | 1891 | Umpire | Il-Ia | , | ||
| John Carey | carey-003joh | 1891 | Oconto Log Drivers | Wisconsin State League | Oconto, WI | ||
| William Carey | carey-006wil | 1891 | 6/23-6/29 | Troy Trojans | Eastern Association | Troy, NY | |
| Ed Carfrey | carfre001ed- | 1891 | Lebanon Cedars | Independent | Lebanon, PA | ||
| Bobby Cargo | cargo-001bob | 1891 | Pitt.-Climax | AllegCo | Pittsburgh, PA | ||
| Bobby Cargo | cargo-001bob | 1891 | Pitt.-EastEndGym | AllegCo | Pittsburgh, PA | ||
| Fred Carl | carl--001fre | 1891 | 6/1-6/8 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| John Carlin | carlin002joh | 1891 | 5/14-8/18 | Olean | New York-Pennsylvania League | Olean, NY | |
| George Carman | carman001geo | 1891 | Phil.-Athletics | Independent | Philadelphia, PA | ||
| Jack Carney | carney002joh | 1891 | 99 g. | Cincinnati | American Association | Cincinnati, OH | |
| Jack Carney | carney002joh | 1891 | 31 g. | Milwaukee | American Association | Milwaukee, WI | |
| Hick Carpenter | carpen001hic | 1891 | 4/17-9/18 | Kansas City Blues | Western Association | Kansas City, MO | |
| Cliff Carroll | carrol002cli | 1891 | 130 g. | Chicago | National League | Chicago, IL | |
| Frank Carroll | carrol003fra | 1891 | 4/30-9/8 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Fred Carroll | carrol001fre | 1891 | 91 g. | Pittsburgh | National League | Pittsburgh, PA | |
| Fred Carroll | carrol001fre | 1891 | 9/9-11/22 | Oakland Colonels | California League | Oakland, CA | |
| John Carroll | carrol001scr | 1891 | 4/16-4/23 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| John Carroll | carrol001scr | 1891 | 5/5 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| John Carroll | carrol001scr | 1891 | 5/8-5/10 | Kansas City Blues | Western Association | Kansas City, MO | |
| John Carroll | carrol001scr | 1891 | 6/5-7/11 | Lowell Lowells | New England League | Lowell, MA | |
| John Carroll | carrol001scr | 1891 | 7/21 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| John Carroll | carrol001scr | 1891 | 7/26-8/14 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| John Carroll | carrol001scr | 1891 | 8/17-8/22 | Umpire | EastA | , | |
| John Carroll | carrol001scr | 1891 | 9/5 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Kid Carsey | carsey001wil | 1891 | 4/8- | 61 g. | Washington | American Association | Washington, DC |
| Ed Cartwright | cartwr001ed- | 1891 | 3/22-11/22 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Bob Caruthers | caruth001bob | 1891 | 56 g. | Brooklyn | National League | Brooklyn, NY | |
| Eugene Case | case--001eug | 1891 | 38 g. | Appleton Papermakers | Wisconsin State League | Appleton, WI | |
| C. Casey | 1891 | Hoosic Falls | Independent | Hoosic Falls, NY | |||
| Dan Casey | casey-002dan | 1891 | 5/12-6/30 | Albany Senators | Eastern Association | Albany, NY | |
| Dan Casey | casey-002dan | 1891 | 8/6-8/8 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Dennis Casey | casey-002den | 1891 | 5/14-9/9 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| James Casey | 1891 | 6/9-9/14 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Will Casey | 1891 | Hoosic Falls | Independent | Hoosic Falls, NY | |||
| Cashart/Cac | cashar001--- | 1891 | +6/23 | Pittsburg | Southwest League | Pittsburg, KS | |
| Ed Cassian | cassia001ed- | 1891 | 6/26- | 6 g. | Philadelphia | National League | Philadelphia, PA |
| Ed Cassian | cassia001ed- | 1891 | -9/20 | 7 g. | Washington | American Association | Washington, DC |
| William Cassiboine | cassib001wil | 1891 | 5/16-9/2 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Elmer Cates | cates-001elm | 1891 | 16 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Benjamin Chadwick | chadwi001ben | 1891 | 4/30-7/11 | Lynn | New England League | Lynn, MA | |
| Frank Chagnon | 1891 | 8/1 | Lewiston | New England League | Lewiston, ME | ||
| Ice Box Chamberlain | chambe001ice | 1891 | 54 g. | Philadelphia | American Association | Philadelphia, PA | |
| Frank Champlin | champl001fra | 1891 | 4/18- | Williamsport Demorest | Independent | Williamsport, PA | |
| Jack Chapman | chapma002jac | 1891 | Louisville | American Association | Louisville, KY | ||
| Ed Cheney | 1891 | Providence Clamdiggers | Eastern Association | Providence, RI | |||
| James Chestnut | chestn001jam | 1891 | Bristol-Plainville | Connecticut State League | Bristol, CT | ||
| Cupid Childs | childs001cla | 1891 | 141 g. | Cleveland | National League | Cleveland, OH | |
| Robert Childs | childs002rob | 1891 | -7/24 | 42 g. | Terre Haute Hottentots | Northwestern League | Terre Haute, IN |
| Chilton | chilto004--- | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Chilton | chilto004--- | 1891 | Wallace ID | Independent | Wallace, ID | ||
| Christy | christ015--- | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Christy | christ015--- | 1891 | Wallace ID | Independent | Wallace, ID | ||
| Daniel Clare | clare-001dan | 1891 | 5/18-5/28 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| William Clare | clare-001wil | 1891 | 6/24-7/21 | Lewiston | New England League | Lewiston, ME | |
| Bob Clark | clark-001bob | 1891 | 16 g. | Cincinnati | National League | Cincinnati, OH | |
| Ed Clark | clark-002ed- | 1891 | 1 g. | Columbus | American Association | Columbus, OH | |
| George Clark | clark-007geo | 1891 | 5/14-9/9 | Olean | New York-Pennsylvania League | Olean, NY | |
| Clark(e) | clark-064--- | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Clark(e) | clark-079--- | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Artie Clarke | clarke001art | 1891 | 48 g. | New York | National League | New York, NY | |
| Dad Clarke | clarke001dad | 1891 | 4/16-7/12 | Omaha Lambs | Western Association | Omaha, NE | |
| Dad Clarke | clarke001dad | 1891 | 5 g. | Columbus | American Association | Columbus, OH | |
| William Clarke | clarke004wil | 1891 | 3/22-11/22 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Dad Clarkson | clarks001dad | 1891 | 4/27-8/14 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Dad Clarkson | clarks001dad | 1891 | 8/20- | 5 g. | New York | National League | New York, NY |
| John Clarkson | clarks001joh | 1891 | 55 g. | Boston | National League | Boston, MA | |
| Fritz Clausen | clause001fri | 1891 | 4/22-6/29 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| Jack Clements | clemen001jac | 1891 | 107 g. | Philadelphia | National League | Philadelphia, PA | |
| Elmer Cleveland | clevel001elm | 1891 | -4/23 | 12 g. | Columbus | American Association | Columbus, OH |
| Elmer Cleveland | clevel001elm | 1891 | 5/19-6/20 | Troy Trojans | Eastern Association | Troy, NY | |
| Edward Cline | 1891 | Umpire | NW | , | |||
| Monk Cline | cline-001mon | 1891 | 4/16-8/21 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Monk Cline | cline-001mon | 1891 | 19 g. | Louisville | American Association | Louisville, KY | |
| Billy Clingman | clingm001wil | 1891 | 5/9-7/19 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Billy Clingman | clingm001wil | 1891 | 8/1-9/9 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Billy Clingman | clingm001wil | 1891 | 1 g. | Cincinnati | American Association | Cincinnati, OH | |
| Bill Clymer | clymer001wil | 1891 | 6/25-6/27 | 3 g. | Philadelphia | American Association | Philadelphia, PA |
| Bill Clymer | clymer001wil | 1891 | 7/19-8/3 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| T.J. Coakley | coakle001t-- | 1891 | 4/30-8/26 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| George Cobb | cobb--003geo | 1891 | 3/29-11/8 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Cochard | cochar001--- | 1891 | 5/20-5/30+ | Detroit Wolverines | Northwestern League | Detroit, MI | |
| A. B. Cockerill | 1891 | +5/31+ | Weir City | Southwest League | Weir City, KS | ||
| Michael Cody | cody--001mic | 1891 | 4/15-10/4 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Archie Cole | cole--001arc | 1891 | 5/19-9/2 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| C. Cole | cole--002c-- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| John Coleman | colema002joh | 1891 | 6/5-7/14 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| John Coleman | colema002joh | 1891 | 8/1-8/21 | Omaha Lambs | Western Association | Omaha, NE | |
| Joseph Coleman | colema004jos | 1891 | 6/27-6/30 | Worcester | New England League | Worcester, MA | |
| William Coleman | colema003wil | 1891 | 5/29-6/16 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Billy Colgan | colgan001ed- | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Leon Collier | collie001leo | 1891 | 4/30-8/22 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| Bill Collins | collin001bil | 1891 | 6/30-8/2 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Bill Collins | collin001bil | 1891 | 8/6-8/12 | Troy Trojans | Eastern Association | Troy, NY | |
| Bill Collins | collin001bil | 1891 | -9/19 | 2 g. | Cleveland | National League | Cleveland, OH |
| Charles Collins | 1891 | 4/16-5/30 | Umpire | WestA | , | ||
| Hub Collins | collin001hub | 1891 | 107 g. | Brooklyn | National League | Brooklyn, NY | |
| William Collins | collin013wil | 1891 | 4/30-7/4 | Portland | New England League | Portland, ME | |
| Jim Collopy | collop001jam | 1891 | 4/30-7/16 | Manchester Amskoegs | New England League | Manchester, NH | |
| Jim Collopy | collop001jam | 1891 | 7/20-7/25 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Charlie Comiskey | comisk001cha | 1891 | 139 g. | St. Louis Browns | American Association | St. Louis, MO | |
| Peter Condoff | condof001pet | 1891 | 6/22-7/20 | Lynn | New England League | Lynn, MA | |
| Peter Condoff | condof001pet | 1891 | 8/6-8/10 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Conley | conley005--- | 1891 | 5/16-5/18 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Alphonse Conley | conley002alp | 1891 | 39 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI | |
| Joe Conley | conley001joe | 1891 | Idaho Falls ID | Independent | Idaho Falls, ID | ||
| Joe Conley | conley001joe | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| Joe Conley | conley001joe | 1891 | Wardner ID | Independent | Wardner, ID | ||
| Josh Conley | conley001cla | 1891 | 4/17-6/16 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Josh Conley | conley001cla | 1891 | 6/18 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Josh Conley | conley001cla | 1891 | 6/22-6/23 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Josh Conley | conley001cla | 1891 | 40 g. | Appleton Papermakers | Wisconsin State League | Appleton, WI | |
| J.W. Conly | conly-000jw- | 1891 | Bates City | Independent | Bates City, | ||
| Ollie Conn | conn--001oli | 1891 | So | , | |||
| Frank Connaughton | connau001fra | 1891 | 7/15 | Woonsocket | New England League | Woonsocket, RI | |
| John Connolly | 1891 | 5/17-9/26 | Umpire | EastA | , | ||
| Jim Connor | connor001jim | 1891 | 4/30-8/1 | Manchester Amskoegs | New England League | Manchester, NH | |
| Roger Connor | connor001rog | 1891 | 129 g. | New York | National League | New York, NY | |
| Denny Connors | connor001den | 1891 | 5/9- | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Denny Connors | connor001den | 1891 | -7/30 Â | 62 g. | Evansville Hoosiers | Northwestern League | Evansville, IN |
| Jerry Connors | connor001jer | 1891 | Clev.-Stars | Independent | Cleveland, OH | ||
| Theodore Conover | conove001the | 1891 | 4/15-7/6 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Theodore Conover | conove001the | 1891 | 8/8-9/21 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Theodore Conover | conove001the | 1891 | 10/1-10/4 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Ben Conroy | conroy001ben | 1891 | 6/3-9/26 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Dick Conway | conway001dic | 1891 | 5/1-6/3 | Lowell Lowells | New England League | Lowell, MA | |
| Jim Conway | conway001jim | 1891 | 4/19-7/5 | Kansas City Blues | Western Association | Kansas City, MO | |
| Pete Conway | conway001pet | 1891-92 | U. Michigan | College | , | ||
| John Coogan | coogan001joh | 1891 | 5/14-9/9 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Charles Cook | 1891 | 6/18-7/21 | Lynn | New England League | Lynn, MA | ||
| Paul Cook | cook--003pau | 1891 | 45 g. | Louisville | American Association | Louisville, KY | |
| Paul Cook | cook--003pau | 1891 | 7 g. | St. Louis Browns | American Association | St. Louis, MO | |
| Paul Cook | cook--003pau | 1891 | 7/29-8/21 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Fred Cooke | cooke-001fre | 1891 | 4/25-5/13 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Jimmy Cooney | cooney002jim | 1891 | 118 g. | Chicago | National League | Chicago, IL | |
| W. J. Cooney | 1891 | Chicago Brands | Chicago City League | Chicago, IL | |||
| Cooper | cooper023--- | 1891 | 7/21 | Portland | New England League | Portland, ME | |
| Jack Corbett | corbet001jac | 1891 | 4/30-7/23 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Jack Corbett | corbet001jac | 1891 | 7/29-9/8 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Teddy Corbett | corbet001edw | 1891 | +6/15+ | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| David Corcoran | corcor001dav | 1891 | 4/30-7/5 | Umpire | Il-Ia | , | |
| J. J. Corcoran | 1891 | no g. | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | ||
| Jack Corcoran | corcor001jac | 1891 | Sioux City Corn Huskers | Western Association | Sioux City, IA | ||
| Jack Corcoran | corcor001jac | 1891 | 5/21-7/20 | Lynn | New England League | Lynn, MA | |
| Tommy Corcoran | corcor002tho | 1891 | 133 g. | Philadelphia | American Association | Philadelphia, PA | |
| Phil Coridan | corida001phi | 1891 | 7/30-8/12 | Umpire | Il-Ia | , | |
| John Corkhill | corkhi001pop | 1891 | 83 g. | Philadelphia | American Association | Philadelphia, PA | |
| John Corkhill | corkhi001pop | 1891 | 1 g. | Cincinnati | National League | Cincinnati, OH | |
| John Corkhill | corkhi001pop | 1891 | 41 g. | Pittsburgh | National League | Pittsburgh, PA | |
| C. Cortez | 1891 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |||
| Andy Costello | costel001and | 1891 | 5/1-7/1 | Lowell Lowells | New England League | Lowell, MA | |
| Andy Costello | costel001and | 1891 | 7/21-9/9 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Henry Cote | cote--002hen | 1891 | 4/28-6/30 | Troy Trojans | Eastern Association | Troy, NY | |
| Henry Cote | cote--002hen | 1891 | 7/3-9/9 | Erie | New York-Pennsylvania League | Erie, PA | |
| Tom Cotter | cotter001tom | 1891 | 9/3- | 6 g. | Boston | American Association | Boston, MA |
| David Coughlin | coughl001dav | 1891 | 4/30-8/1 | Manchester Amskoegs | New England League | Manchester, NH | |
| David Coughlin | coughl001dav | 1891 | 8/11-8/22 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Roscoe Coughlin | coughl001ros | 1891 | 8 g. | New York | National League | New York, NY | |
| Roscoe Coughlin | coughl001ros | 1891 | 4/25-8/24 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Frank Cox | cox---003fra | 1891 | 5/?-6/? | New Britain Brass City | Connecticut State League | New Britain, CT | |
| John Cox | cox---008joh | 1891 | Norristown | Independent | Norristown, PA | ||
| John Cox | cox---008joh | 1891 | 7/31 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Joe Coyne | coyne-001joe | 1891 | 4/30-8/26 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| Craft | craft-005--- | 1891 | Marquette Undertakers | Upper Peninsula League | Marquette, WI | ||
| Ed Crane | crane-001ed- | 1891 | 34 g. | Cincinnati | American Association | Cincinnati, OH | |
| Ed Crane | crane-001ed- | 1891 | 15 g. | Cincinnati | National League | Cincinnati, OH | |
| Fred Craves | craves001fre | 1891 | 5/9-6/4 | Bay City | Northwestern League | Bay City, MI | |
| Fred Craves | craves001fre | 1891 | 6/22-7/21 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Charles Crawford | 1891 | Nebraska City | Independent | Nebraska City, NE | |||
| Charles Crawford | 1891 | Parsons | Southwest League | Parsons, KS | |||
| Joseph Creegan | creega001jos | 1891 | 8/5-8/8 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Gus Creely | creely001gus | 1891 | 5/14-6/16 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Lou Criger | criger001lou | 1891 | Elkh.-Truths | Independent | Elkhart, IN | ||
| Jack Croghan | crogan001joh | 1891 | 5/22-7/21 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Cronin | cronin011--- | 1891 | 6/16 | Worcester | New England League | Worcester, MA | |
| Daniel Cronin | cronin003dan | 1891 | 4/30-8/1 | Manchester Amskoegs | New England League | Manchester, NH | |
| Jack Crooks | crooks001jac | 1891 | 138 g. | Columbus | American Association | Columbus, OH | |
| Clarence Cross | cross-001cla | 1891 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | ||
| Lave Cross | cross-001laf | 1891 | 110 g. | Philadelphia | American Association | Philadelphia, PA | |
| Lem Cross | cross-001lem | 1891 | 5/2-8/1 | Manchester Amskoegs | New England League | Manchester, NH | |
| Monte Cross | cross-001mon | 1891 | 4/25-9/26 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Dan Crotty | crotty001dan | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| Joseph Crowe | crowe-000jos | 1891 | Chicago Garden Citys | Chicago City League | Chicago, IL | ||
| Billy Crowell | crowel001bil | 1891 | 4/ | Cincinnati Shamrocks | Independent | Cincinnati, OH | |
| Billy Crowell | crowel001bil | 1891 | 6/13-6/25 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Jim Cudworth | cudwor001jim | 1891 | 4/25-6/6 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Jim Cudworth | cudwor001jim | 1891 | 6/19-8/10 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Eddie Cull | cull--001edw | 1891 | 25 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Culp | culp--002--- | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Cunningham | cunnin007--- | 1891 | Pittsburg | Southwest League | Pittsburg, KS | ||
| Bert Cunningham | cunnin001ell | 1891 | 31 g. | Baltimore | American Association | Baltimore, MD | |
| George Cuppy | cuppy-001geo | 1891 | 5/14-8/15 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| George Cuppy | cuppy-001geo | 1891 | 8/24-9/7 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Eugene Curry | curry-001eug | 1891 | Seattle | PugetSound | Seattle, WA | ||
| Wes Curry | curry-001wes | 1891 | 4/25-6/20 | Umpire | EastA | , | |
| Kid Curtis | curtis001kid | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| Jim Curtiss | curtis001jim | 1891 | 4/16-7/12 | Denver Mountaineers | Western Association | Denver, CO | |
| Jim Curtiss | curtis001jim | 1891 | 7/15- | 27 g. | Cincinnati | National League | Cincinnati, OH |
| Jim Curtiss | curtis001jim | 1891 | 29 g. | Washington | American Association | Washington, DC | |
| Charlie Cushman | cushma001cha | 1891 | 4/16-8/13 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| Charlie Cushman | cushma001cha | 1891 | 8/18-10/4 | g. | Milwaukee | American Association | Milwaukee, WI |
| Ed Cushman | cushma001ed- | 1891 | 5/25-8/25 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Ed Cushman | cushma001ed- | 1891 | 9/7 | Erie | New York-Pennsylvania League | Erie, PA | |
| Ed Cutler | cutler001ed- | 1891 | 5/1-6/15 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Dacey | 1891 | Hannibal | Independent | Hannibal, MO | |||
| Bill Dahlen | dahlen001wil | 1891 | 4/22- | 135 g. | Chicago | National League | Chicago, IL |
| J. Dahmke | dahmke000j-- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| Vince Dailey | dailey001vin | 1891 | 5/14-9/9 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Con Daily | daily-001con | 1891 | 60 g. | Brooklyn | National League | Brooklyn, NY | |
| Ed Daily | daily-001ed- | 1891 | 22 g. | Louisville | American Association | Louisville, KY | |
| Ed Daily | daily-001ed- | 1891 | 21 g. | Washington | American Association | Washington, DC | |
| Dale | dale--001--- | 1891 | 6/26-7/12 | Oakland Colonels | California League | Oakland, CA | |
| William Dale | dale--001wil | 1891 | 4/30-8/23 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| William Dale | dale--001wil | 1891 | 8/24 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Bill Daley | daley-001bil | 1891 | -6/30 | 20 g. | Boston | American Association | Boston, MA |
| Bill Daley | daley-001bil | 1891 | 9/17-9/19 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| John Daley | daley-002joh | 1891 | Chicago Whitings | Chicago City League | Chicago, IL | ||
| Dalrymple | dalrym002--- | 1891 | 6/27 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Abner Dalrymple | dalrym001abn | 1891 | 4/16-8/13 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| Abner Dalrymple | dalrym001abn | 1891 | 8/18-10/2 | 32 g. | Milwaukee | American Association | Milwaukee, WI |
| Dalton | dalton005--- | 1891 | Chicago Whitings | Chicago City League | Chicago, IL | ||
| Andrew Dalton | dalton001and | 1891 | 4/18-4/20 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Andrew Dalton | dalton001and | 1891 | 5/9-5/14 | Peoria Distillers | Northwestern League | Peoria, IL | |
| Andrew Dalton | dalton001and | 1891 | Calumet Red Jackets | Upper Peninsula League | Calumet, MI | ||
| Andrew Dalton | dalton001and | 1891 | Kansas City Blues | Western Association | Kansas City, MO | ||
| Daly | daly--010--- | 1891 | 5/2-6/9 | Hartford | Connecticut State League | Hartford, CT | |
| Joe Daly | daly--001joe | 1891 | 1 g. | Cleveland | National League | Cleveland, OH | |
| Sun Daly | daly--001sun | 1891 | 4/30-8/1 | Portland | New England League | Portland, ME | |
| Sun Daly | daly--001sun | 1891 | 8/11-9/26 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Tom Daly | daly--002tho | 1891 | 58 g. | Brooklyn | National League | Brooklyn, NY | |
| Charles Daniels | daniel005cha | 1891 | Olean | New York-Pennsylvania League | Olean, NY | ||
| Pete Daniels | daniel003pet | 1891 | 4/30-9/7 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| George Darby | darby-001geo | 1891 | 5/1-7/7 | Portland | New England League | Portland, ME | |
| George Darby | darby-001geo | 1891 | 7/19-8/3 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| George Darby | darby-001geo | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| George Darby | darby-001geo | 1891 | 8/28-8/29 | Sacramento Senators | California League | Sacramento, CA | |
| Dell Darling | darlin001del | 1891 | 17 g. | St. Louis Browns | American Association | St. Louis, MO | |
| Dell Darling | darlin001del | 1891 | 4/17-8/9 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| William Darnbrough | darnbr001wil | 1891 | 4/17-7/1 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| William Darnbrough | darnbr001wil | 1891 | 7/6-7/19 | Kansas City Blues | Western Association | Kansas City, MO | |
| Jack Darragh | darrag001jac | 1891 | +4/5+ | U. of Pennsylvania | College | , | |
| Jack Darragh | darrag001jac | 1891 | 5/13 | 1 g. | Louisville | American Association | Louisville, KY |
| Jack Darragh | darrag001jac | 1891 | Cape May | Amat | Cape May, NJ | ||
| John Darrah | darrah001joh | 1891 | 4/15-10/4 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| John Darrah | darrah001joh | 1891 | San Jose Dukes | California League | San Jose, CA | ||
| Dan Daub | daub--002dan | 1891 | Denison Univ. | College | , | ||
| George Davies | davies001geo | 1891 | 4/18-8/13 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| George Davies | davies001geo | 1891 | 8/18-7/20 | 12 g. | Milwaukee | American Association | Milwaukee, WI |
| George Davis | davis-015geo | 1891 | 136 g. | Cleveland | National League | Cleveland, OH | |
| H. Davis | 1891 | Lincoln Rustlers | Western Association | Lincoln, NE | |||
| Harry Davis | davis-006har | 1891 | Bank Clerks AC | Amat | , | ||
| Ira Davis | davis-008j-- | 1891 | 5/13 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Jumbo Davis | davis-001jum | 1891 | 12 g. | Washington | American Association | Washington, DC | |
| Jumbo Davis | davis-001jum | 1891 | 4/10-9/11 | MLB Umpire | American Association | , | |
| Lee Dawkins | dawkin001lev | 1891 | Joplin | Southwest League | Joplin, MO | ||
| Bill Day | day---001bil | 1891 | 5/2-6/10 | Troy Trojans | Eastern Association | Troy, NY | |
| Eddie Day | day---001edd | 1891 | 5/9- | Reading | Independent | Reading, PA | |
| Frank Day | day---001fra | 1891 | 4/25-8/6 | Troy Trojans | Eastern Association | Troy, NY | |
| Frank Day | day---001fra | 1891 | 8/18-9/4 | Omaha Lambs | Western Association | Omaha, NE | |
| Edward Deady | deady-001edw | 1891 | 5/23-7/18 | Salem | New England League | Salem, MA | |
| Pat Dealy | dealy-001pat | 1891 | 7/16-9/9 | Olean | New York-Pennsylvania League | Olean, NY | |
| William Dean | 1891 | Umpire | NY-Pa | , | |||
| George Decker | decker003geo | 1891 | 4/30-9/4 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Harry Decker | decker001har | 1891 | 4/28-6/16 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Ed Delahanty | delaha001edw | 1891 | 128 g. | Philadelphia | National League | Philadelphia, PA | |
| Deland | 1891 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |||
| Bill Delaney | delane001bil | 1891 | Canton | TriSt | Canton, OH | ||
| Bill Delaney | delane001bil | 1891 | 5/9-6/4+ | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Fred Demarais | demara001fre | 1891 | 1 g. | Peoria Distillers | Northwestern League | Peoria, IL | |
| Fred Demarais | demara001fre | 1891 | 8/29 | Umpire | Il-Ia | , | |
| Lou Denger | denger001lou | 1891 | 4/30-6/1 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Lou Denger | denger001lou | 1891 | no g. | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Jerry Denny | denny-001jer | 1891 | 4 g. | New York | National League | New York, NY | |
| Jerry Denny | denny-001jer | 1891 | 36 g. | Cleveland | National League | Cleveland, OH | |
| Jerry Denny | denny-001jer | 1891 | 19 g. | Philadelphia | National League | Philadelphia, PA | |
| Gene Derby | derby-001gen | 1891 | 7/25-7/30 | Troy Trojans | Eastern Association | Troy, NY | |
| Jess Derrick | derric001jes | 1891 | 5/26- | Oconto Log Drivers | Wisconsin State League | Oconto, WI | |
| William Deveney | devinn001pun | 1891 | Chester PA | Independent | Chester, PA | ||
| William Deveney | devinn001pun | 1891 | Scranton | Independent | Scranton, PA | ||
| William Devereaux | devere001wil | 1891 | Oakland Colonels | California League | Oakland, CA | ||
| Jim Devlin | devlin002jim | 1891 | 4/27-9/25 | Albany Senators | Eastern Association | Albany, NY | |
| Charlie Dewald | dewald001cha | 1891 | 4/17-8/17 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Delphis Dextraze | dextra001del | 1891 | 7/18 | Oakland Colonels | California League | Oakland, CA | |
| Edwin Dibble | dibble001edw | 1891 | 5/14-6/23 | Olean | New York-Pennsylvania League | Olean, NY | |
| Edwin Dibble | dibble001edw | 1891 | 7/14-7/15 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| James Dillon | dillon002jam | 1891 | 4/30-6/1 | Lynn | New England League | Lynn, MA | |
| Dineen | dineen002--- | 1891 | +8/16+ | Chicago Franklins | Chicago City League | Chicago, IL | |
| Eddie Dixon | dixon-002edw | 1891 | Ishpeming | Upper Peninsula League | Ishpeming, MI | ||
| Dobbins | dobbin001--- | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Tom Dobyns | dobyne001tho | 1891 | -8/ | 55 g. | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI |
| Fred Doe | doe---002fre | 1891 | Brockton | Independent | Brockton, MA | ||
| Doffer | doffer000--- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| John Dolan | dolan-002joh | 1891 | 28 g. | Columbus | American Association | Columbus, OH | |
| John Dolan | dolan-002joh | 1891 | 9/6-9/13 | Denver Mountaineers | Western Association | Denver, CO | |
| Tom Dolan | dolan-001tom | 1891 | -10/4 | 3 g. | MLB Umpire | American Association | , |
| Billy Donaghy | donagh001bil | 1891 | 5/21-5/27 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Donahue | donahu007--- | 1891 | +6/5- | Meriden | Connecticut State League | Meriden, CT | |
| Donahue | donahu005--- | 1891 | 6/6-6/10 | Waterbury | Connecticut State League | Waterbury, CT | |
| Jim Donahue | donahu001jim | 1891 | 77 g. | Columbus | American Association | Columbus, OH | |
| Tim Donahue | donahu001tim | 1891 | 7/28- | 4 g. | Boston | American Association | Boston, MA |
| Donnelly | donnel025--- | 1891 | 33 g. | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI | |
| Jim Donnelly | donnel002jim | 1891 | 4/16-7/12 | Omaha Lambs | Western Association | Omaha, NE | |
| Jim Donnelly | donnel002jim | 1891 | 17 g. | Columbus | American Association | Columbus, OH | |
| Jim Donnelly | donnel001jim | 1891 | Cambridge Reds | Independent | Cambridge, OH | ||
| Alexander Donoghue | donohu001ale | 1891 | 4/25-8/8 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Alexander Donoghue | donohu001ale | 1891 | 8/24-8/29 | 6 g. | Philadelphia | National League | Philadelphia, PA |
| Alexander Donoghue | donohu001ale | 1891 | 9/1-9/9 | Erie | New York-Pennsylvania League | Erie, PA | |
| Neil Donohue | donohu001nei | 1891 | 4/18-8/16 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Neil Donohue | donohu001nei | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Donovan | donova035--- | 1891 | 5/7-5/8 | Salem | New England League | Salem, MA | |
| Ed Donovan | donova001ed- | 1891 | 53 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Jack Donovan | donova003jac | 1891 | 4/30-8/26 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| James Donovan | donova005jam | 1891 | 8/1 | Lewiston | New England League | Lewiston, ME | |
| Patsy Donovan | donova001pat | 1891 | 105 g. | Louisville | American Association | Louisville, KY | |
| Patsy Donovan | donova001pat | 1891 | 17 g. | Washington | American Association | Washington, DC | |
| William Donovan | donova007wil | 1891 | 6/10-8/1 | Lewiston | New England League | Lewiston, ME | |
| Charles Dooley | dooley001cha | 1891 | 3/22-11/22 | San Jose Dukes | California League | San Jose, CA | |
| John Doran | doran-001joh | 1891 | 4/11-6/1 | 15 g. | Louisville | American Association | Louisville, KY |
| John Doran | doran-001joh | 1891 | 6/22-8/4 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| John Doran | doran-001joh | 1891 | 8/18-9/15 | Troy Trojans | Eastern Association | Troy, NY | |
| Herm Doscher | dosche001her | 1891 | 4/25-9/26 | Umpire | EastA | , | |
| Babe Doty | doty--001bab | 1891 | Saginaw MI | Independent | Saginaw, MI | ||
| Babe Doty | doty--001bab | 1891 | 5/15-7/4 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Zim Dougan | dougan001zim | 1891 | 5/9-7/12 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Ed Douglas | dougla000ed- | 1891 | Marquette Undertakers | Upper Peninsula League | Marquette, WI | ||
| George Douglass | 1891 | +6/4 | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT | ||
| George Douglass | 1891 | 4/22-10/11 | Cuban Giants | Independent | Cuban, | ||
| Clarence Dow | dow---001cla | 1891 | 9/4 | MLB Umpire | American Association | , | |
| Tommy Dowd | dowd--001tho | 1891 | 4/8- | 4 g. | Boston | American Association | Boston, MA |
| Tommy Dowd | dowd--001tho | 1891 | 112 g. | Washington | American Association | Washington, DC | |
| Joe Dowie | dowie-001joe | 1891 | 5/31-7/29 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Joe Dowie | dowie-001joe | 1891 | 35 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI | |
| Billy Dowling | dowlin001bil | 1891 | 5/2 | Waterbury | Connecticut State League | Waterbury, CT | |
| Downs | downs-004--- | 1891 | 1 g. | Bay City | Northwestern League | Bay City, MI | |
| Tom Dowse | dowse-001tom | 1891 | 55 g. | Columbus | American Association | Columbus, OH | |
| Conny Doyle | doyle-001con | 1891 | 4/25-8/5 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| David Doyle | doyle-002dav | 1891 | 5/7 | Salem | New England League | Salem, MA | |
| Edward Doyle | doyle-002edw | 1891 | 5/18-6/26 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Edward Doyle | doyle-002edw | 1891 | 7/9-9/26 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| J.C. Doyle | doyle-001nei | 1891 | 4/28-5/6 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| J.C. Doyle | doyle-003j-- | 1891 | 5/14-9/9 | Olean | New York-Pennsylvania League | Olean, NY | |
| Jack Doyle | doyle-002joh | 1891 | 69 g. | Cleveland | National League | Cleveland, OH | |
| Michael Doyle | doyle-003mic | 1891 | Hoosic Falls | Independent | Hoosic Falls, NY | ||
| Jake Drauby | drauby001jak | 1891 | 5/9-8/29 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Benjamin Drischel | drisch001ben | 1891 | Knoxville | Independent | Knoxville, TN | ||
| Andrew Driscoll | drisco001and | 1891 | 5/15 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Andrew Driscoll | drisco001and | 1891 | 5/19-6/5 | Waterbury | Connecticut State League | Waterbury, CT | |
| Charlie Duffee | duffee001cha | 1891 | 137 g. | Columbus | American Association | Columbus, OH | |
| Duffey | duffey002--- | 1891 | 7/30 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Hugh Duffy | duffy-001hug | 1891 | 127 g. | Boston | American Association | Boston, MA | |
| J. Duffy | duffy-003j-- | 1891 | Chicago Franklins | Chicago City League | Chicago, IL | ||
| John Duffy | 1891 | Chicago Whitings | Chicago City League | Chicago, IL | |||
| Dan Dugdale | dugdal001dan | 1891 | 4/17-7/15 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Dan Dugdale | dugdal001dan | 1891 | 7/25-8/2 | Omaha Lambs | Western Association | Omaha, NE | |
| Dan Dugdale | dugdal001dan | 1891 | 8/1 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Martin Duke | duke--002mar | 1891 | 4/17-8/1 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Martin Duke | duke--002mar | 1891 | 8/24-9/7 | 4 g. | Washington | American Association | Washington, DC |
| Jim Duncan | duncan001jim | 1891 | 5/14-5/28 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Sam Dungan | dungan001sam | 1891 | 4/17-7/4 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| Sam Dungan | dungan001sam | 1891 | 7/25-9/13 | Omaha Lambs | Western Association | Omaha, NE | |
| Fred Dunlap | dunlap002fre | 1891 | 8 g. | Washington | American Association | Washington, DC | |
| Dunn | 1891 | 5/9-6/11 | Umpire | NW | , | ||
| Harry Dunn | 1891 | Utica-Shamrocks | Independent | Utica, NY | |||
| Harry Dunn | 1891 | Utica-Acme | Independent | Utica, NY | |||
| Widdy Dunn | dunn--001wid | 1891 | 5/14-8/15 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Andy Dunning | dunnin001and | 1891 | 4/30-8/1 | Manchester Amskoegs | New England League | Manchester, NH | |
| Andy Dunning | dunnin001and | 1891 | 7/28 | 1 g. | New York | National League | New York, NY |
| Andy Dunning | dunnin001and | 1891 | -9/21 | Oconto Log Drivers | Wisconsin State League | Oconto, WI | |
| Jesse Duryea | duryea001jes | 1891 | 10 g. | Cincinnati | National League | Cincinnati, OH | |
| Jesse Duryea | duryea001jes | 1891 | 3 g. | St. Louis Browns | American Association | St. Louis, MO | |
| Dwyer | dwyer-012--- | 1891 | 5/14-8/5 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Dwyer | dwyer-003--- | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| Frank Dwyer | dwyer-001fra | 1891 | 37 g. | Cincinnati | American Association | Cincinnati, OH | |
| Frank Dwyer | dwyer-001fra | 1891 | 11 g. | Milwaukee | American Association | Milwaukee, WI | |
| James Dyer | dyer--007--- | 1891 | +6/5- | Meriden | Connecticut State League | Meriden, CT | |
| Eagan | eagan-008--- | 1891 | 2 g. | Bay City | Northwestern League | Bay City, MI | |
| Bill Eagan | eagan-001bil | 1891 | 4/8- | 82 g. | St. Louis Browns | American Association | St. Louis, MO |
| Bill Eagan | eagan-001bil | 1891 | Columbia SC | Independent | Columbia, SC | ||
| Pete Eagan | eagan-001pat | 1891 | 4/25-6/10 | Troy Trojans | Eastern Association | Troy, NY | |
| Pete Eagan | eagan-001pat | 1891 | 7/3-8/26 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| Howard Earl | earl--002how | 1891 | 31 g. | Milwaukee | American Association | Milwaukee, WI | |
| Howard Earl | earl--002how | 1891 | 4/16-5/18 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Howard Earl | earl--002how | 1891 | 5/29-8/13 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| Billy Earle | earle-001bil | 1891 | 4/16-9/13 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Earley | earley000--- | 1891 | Butte Electric | Independent | Butte, MT | ||
| Henry Easterday | easter001hen | 1891 | 4/25-8/11 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Jack Easton | easton001jac | 1891 | 24 g. | Columbus | American Association | Columbus, OH | |
| Jack Easton | easton001jac | 1891 | 9 g. | St. Louis Browns | American Association | St. Louis, MO | |
| Hi Ebright | ebrigh001hi- | 1891 | 3/22-7/19 | San Jose Dukes | California League | San Jose, CA | |
| Hi Ebright | ebrigh001hi- | 1891 | 7/24-8/2 | Oakland Colonels | California League | Oakland, CA | |
| Hi Ebright | ebrigh001hi- | 1891 | 8/6-11/22 | San Jose Dukes | California League | San Jose, CA | |
| Jerry Eddinger | edinge001jer | 1891 | 5/- | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| Jerry Eddinger | edinge001jer | 1891 | 28 g. | Appleton Papermakers | Wisconsin State League | Appleton, WI | |
| Edward Egan | egan--002edw | 1891 | Peru | Independent | Peru, IN | ||
| Edward Egan | egan--002edw | 1891 | 6/- | 49 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI |
| Eggert | eggert004--- | 1891 | Chicago Franklins | Chicago City League | Chicago, IL | ||
| Red Ehret | ehret-001phi | 1891 | 26 g. | Louisville | American Association | Louisville, KY | |
| Red Ehret | ehret-001phi | 1891 | 7/4-8/21 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Red Ehret | ehret-001phi | 1891 | 8/27-9/12 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Ed Eiteljorge | eitelj001ed- | 1891 | DePauw Univ. | College | , | ||
| Ed Eiteljorge | eitelj001ed- | 1891 | 4/16-7/12 | Omaha Lambs | Western Association | Omaha, NE | |
| Ed Eiteljorge | eitelj001ed- | 1891 | 8 g. | Washington | American Association | Washington, DC | |
| Bones Ely | ely---001wil | 1891 | 4/17-6/16 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Bones Ely | ely---001wil | 1891 | 6/18-8/17 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Bones Ely | ely---001wil | 1891 | 31 g. | Brooklyn | National League | Brooklyn, NY | |
| Bobby Emmerke | emmerk001rob | 1891 | -8/ | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | |
| Bob Emslie | emslie001bob | 1891 | 4/16-8/14 | Umpire | WestA | , | |
| Bob Emslie | emslie001bob | 1891-00 | MLB Umpire | National League | , | ||
| Ensworth | enswor001--- | 1891 | 5/2- | Southington | Connecticut State League | Southington, CT | |
| Fred Erichson | erichs001fre | 1891 | Houston | Independent | Houston, TX | ||
| Frank Erigh | erigh-001fra | 1891 | 5/9-8/8+ | Reading | PA | Reading, PA | |
| Duke Esper | esper-001duk | 1891 | 39 g. | Philadelphia | National League | Philadelphia, PA | |
| Dude Esterbrook | esterb001dud | 1891 | 3 g. | Brooklyn | National League | Brooklyn, NY | |
| Dude Esterbrook | esterb001dud | 1891 | no g. | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| King Esterbrook | esterb001kin | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| King Esterbrook | esterb001kin | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Tony Esterquest | esterq001ant | 1891 | Chicago Brands | Chicago City League | Chicago, IL | ||
| Fred Evans | evans-003fre | 1891 | 5/1-7/4 | Lowell Lowells | New England League | Lowell, MA | |
| George Evans | evans-006geo | 1891 | +6/4 | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT | |
| Bill Everitt | everet001wil | 1891 | 3/22-11/22 | San Jose Dukes | California League | San Jose, CA | |
| Ewing | ewing-001--- | 1891 | 11/21-11/22 | Sacramento Senators | California League | Sacramento, CA | |
| Buck Ewing | ewing-001buc | 1891 | 14 g. | New York | National League | New York, NY | |
| John Ewing | ewing-001joh | 1891 | 33 g. | New York | National League | New York, NY | |
| Charles Faatz | faatz-001cha | 1891 | 5/26-9/ | 87 g. | Appleton Papermakers | Wisconsin State League | Appleton, WI |
| Jay Faatz | faatz-001jay | 1891 | 4/28-8/4 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Henry Fabian | fabian001hen | 1891 | 4/30-8/29 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Bill Fagan | fagan-001bil | 1891 | no g. | Troy Trojans | Eastern Association | Troy, NY | |
| Bill Fagan | fagan-001bil | 1891 | 7/1-8/1 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Jack Fanning | fannin001jac | 1891 | 4/16-10/3 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Tom Farley | farley001tho | 1891 | Chic.- | ChicCity | Chicago, IL | ||
| Sid Farrar | farrar001sid | 1891 | 4/25-8/14 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Charles Farrell | farrel004cha | 1891 | 5/1-7/22 | Lowell Lowells | New England League | Lowell, MA | |
| Duke Farrell | farrel002cha | 1891 | 122 g. | Boston | American Association | Boston, MA | |
| Frank Farrell | farrel003fra | 1891 | 8/1? | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Jack Farrell | farrel002jac | 1891 | 7/29-8/1 | Portland | New England League | Portland, ME | |
| John Farrell | farrel006joh | 1891 | Winston | Independent | Winston, NC | ||
| William Farrell | farrel001wil | 1891 | 6/27 | Oakland Colonels | California League | Oakland, CA | |
| James Farrington | farrin002jam | 1891 | Harrisburg PA? | Independent | Harrisburg, PA | ||
| James Farrington | farrin002jam | 1891 | Lebanon Cedars | Eastern Association | Lebanon, PA | ||
| Frank Favour | favour001fra | 1891 | 6/8-9/24 | 53 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI |
| Frank Fear | fear--001fra | 1891 | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | ||
| Frank Fear | fear--001fra | 1891 | 6/23--7/11+ | Fort Scott | Southwest League | Fort Scott, KS | |
| Bud Fears | fears-001bud | 1891 | Carthage | Southwest League | Carthage, MO | ||
| Jack Fee | fee---001jac | 1891 | 5/15-7/10 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Jack Fee | fee---001jac | 1891 | 7/18 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Jack Fee | fee---001jac | 1891 | 7/25-8/21 | Omaha Lambs | Western Association | Omaha, NE | |
| Jack Fee | fee---001jac | 1891 | 8/28-9/7 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| John Feen | feen--001joh | 1891 | 4/30-7/31 | Worcester | New England League | Worcester, MA | |
| John Feen | feen--001joh | 1891 | 8/11-8/14 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Charles Feeney | feeney001cha | 1891 | -9/ | 51 g. | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI |
| J.J. Fennessey | fennes001j-- | 1891 | 6/15 | Salem | New England League | Salem, MA | |
| Alex Ferson | ferson001ale | 1891 | 4/27-7/27 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Alex Ferson | ferson001ale | 1891 | Northampton | Independent | Northampton, MA | ||
| Jim Field | field-001jim | 1891 | 4/25-9/26 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Jocko Fields | fields001joc | 1891 | 23 g. | Pittsburgh | National League | Pittsburgh, PA | |
| Jocko Fields | fields001joc | 1891 | 8 g. | Philadelphia | National League | Philadelphia, PA | |
| Jocko Fields | fields001joc | 1891 | 8/1-9/13 | Omaha Lambs | Western Association | Omaha, NE | |
| George Fife | fife--000geo | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| George Finke | finke-001geo | 1891 | +5/22- | Norwich | Connecticut State League | Norwich, CT | |
| Mike Finn | finn--002mic | 1891 | 3/22-11/22 | San Jose Dukes | California League | San Jose, CA | |
| Michael Firle | firle-002mic | 1891 | 27 g. | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| John Firth | firth-003joh | 1891 | 6/3-7/20 | Lynn | New England League | Lynn, MA | |
| Al Fisher | fisher001al- | 1891 | 4/30-9/8 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Al Fisher | fisher001al- | 1891 | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | ||
| Chauncey Fisher | fisher005cha | 1891 | Appleton Papermakers | Wisconsin State League | Appleton, WI | ||
| Harry Fisher | fisher008har | 1891 | 5/9-7/16 | Dayton | Northwestern League | Dayton, OH | |
| Frank Fitch | fitch-002fra | 1891 | 58 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Fitzgerald | 1891 | 5/2-6/4 | Hartford | Connecticut State League | Hartford, CT | ||
| John Fitzgerald | fitzge007joh | 1891 | 5/2-7/16 | Salem | New England League | Salem, MA | |
| John Fitzgerald | fitzge007joh | 1891 | 7/18-10/5 | 6 g. | Boston | American Association | Boston, MA |
| John Fitzgerald | fitzge010joh | 1891 | 5/19 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Joseph Fitzgerald | fitzge004jos | 1891 | 4/27-9/26 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Michael Fitzgerald | 1891 | 5/2-6/4 | Hartford | Connecticut State League | Hartford, CT | ||
| Mike Fitzgerald | fitzge001mik | 1891 | 6/14-6/20 | Oakland Colonels | California League | Oakland, CA | |
| Mike Fitzgerald | fitzge001mik | 1891 | 8/14 | Sacramento Senators | California League | Sacramento, CA | |
| Warren Fitzgerald | fitzge001war | 1891 | 6/4- | 33 g. | Louisville | American Association | Louisville, KY |
| Fitzpatrick | fitzpa014--- | 1891 | +5/6- | New Britain Brass City | Connecticut State League | New Britain, CT | |
| John Fitzsimmons | fitzsi001joh | 1891 | 17 g. | Bay City | Northwestern League | Bay City, MI | |
| Charles Flack | flack-001cha | 1891 | 5/14-6/24+ | Olean | New York-Pennsylvania League | Olean, NY | |
| Charles Flack | flack-001cha | 1891 | 7/14-8/7 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Pat Flaherty | flaher005pat | 1891 | 4/19-8/23 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Pat Flaherty | flaher005pat | 1891 | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | ||
| Pat Flaherty | flaher005pat | 1891 | 11/8 | Sacramento Senators | California League | Sacramento, CA | |
| Ed Flanagan | flanag001ed- | 1891 | 29 g. | Bay City | Northwestern League | Bay City, MI | |
| Ed Flanagan | flanag001ed- | 1891 | 6/10-7/21 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Ed Flanagan | flanag001ed- | 1891 | 7/29-9/13 | Omaha Lambs | Western Association | Omaha, NE | |
| Mart Flanagan | flanag001mar | 1891 | 5/9-5/17 | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Mart Flanagan | flanag001mar | 1891 | 5/21-7/27 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Thomas Flanagan | flanag001tho | 1891 | 5/22-7/23 | Lowell Lowells | New England League | Lowell, MA | |
| Thomas Flanagan | flanag001tho | 1891 | 8/11-9/9 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Thomas Flanagan | flanag002tho | 1891 | 43 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Flanigan | flanig003--- | 1891 | 34 g. | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI | |
| Jack Flannery | flanne001joh | 1891 | Hastings MN | Independent | Hastings, MN | ||
| William Flannery | flanne001wil | 1891 | 4/30-6/30 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Eddie Flavin | flavin001edw | 1891 | 4/30 | Lynn | New England League | Lynn, MA | |
| Thomas Fleming | 1891 | NJCent | , | ||||
| Thomas Flood | flood-001tho | 1891 | 4/16 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Thomas Flood | flood-001tho | 1891 | 5/7-5/16 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Thomas Flood | flood-001tho | 1891 | 5/30-7/29 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Flynn | flynn-005--- | 1891 | 7/2 | Denver Mountaineers | Western Association | Denver, CO | |
| George Flynn | flynn-003geo | 1891 | 65 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI | |
| James Flynn | flynn-005jam | 1891 | Webb City | Southwest League | Webb City, MO | ||
| Mike Flynn | flynn-001mik | 1891 | Dover NH | Independent | Dover, NH | ||
| Mike Flynn | flynn-001mik | 1891 | 8/31 | 1 g. | Boston | American Association | Boston, MA |
| Jack Fogarty | fogart005joh | 1891 | 3/22-5/3 | San Jose Dukes | California League | San Jose, CA | |
| Jack Fogarty | fogart005joh | 1891 | 49 g. | Dayton | Northwestern League | Dayton, OH | |
| John Fogarty | fogart002joh | 1891 | no g. | Olean | New York-Pennsylvania League | Olean, NY | |
| Jeremiah Foley | foley-002jer | 1891 | 4/30 | Troy Trojans | Eastern Association | Troy, NY | |
| Jeremiah Foley | foley-002jer | 1891 | 5/2-6/5 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Jeremiah Foley | foley-002jer | 1891 | 6/19-7/13 | Lewiston | New England League | Lewiston, ME | |
| Jeremiah Foley | foley-002jer | 1891 | 7/23 | Lowell Lowells | New England League | Lowell, MA | |
| Ford | 1891 | +6/10- | Southington | Connecticut State League | Southington, CT | ||
| Lawrence Ford | ford--001l-- | 1891 | 55 g. | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI | |
| Tom Ford | ford--001tom | 1891 | no g. | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Frank Foreman | forema001fra | 1891 | 1 g. | Cincinnati | National League | Cincinnati, OH | |
| Frank Foreman | forema001fra | 1891 | 50 g. | Washington | American Association | Washington, DC | |
| Tom Forster | forste001tom | 1891 | no g. | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Tom Forster | forste001tom | 1891 | Spokane Bunch Grassers | Independent | Spokane, WA | ||
| Foster | foster009--- | 1891 | Calumet Red Jackets | Upper Peninsula League | Calumet, MI | ||
| Albert Foster | foster002alb | 1891-92 | Univ. of Georgia | College | , | ||
| Elmer Foster | foster001elm | 1891 | 4 g. | Chicago | National League | Chicago, IL | |
| Elmer Foster | foster001elm | 1891 | 5/11-8/9 | Kansas City Blues | Western Association | Kansas City, MO | |
| Frank Foulkrod | foulkr001fra | 1891 | 22 g. | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Frank Foulkrod | foulkr001--- | 1891 | Marquette Undertakers | Upper Peninsula League | Marquette, WI | ||
| Henry Fournier | fourni001hen | 1891 | 4/16-9/4 | Denver Mountaineers | Western Association | Denver, CO | |
| Henry Fournier | fourni001hen | 1891 | 9/12-9/13 | Omaha Lambs | Western Association | Omaha, NE | |
| Dave Foutz | foutz-001dav | 1891 | 130 g. | Brooklyn | National League | Brooklyn, NY | |
| Bud Fowler | fowler004joh | 1891 | , | ||||
| Fox | 1891 | Reading | Independent | Reading, PA | |||
| George Fox | fox---001pad | 1891 | 7/13- | 6 g. | Louisville | American Association | Louisville, KY |
| Fraiser | fraise001--- | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| France | 1891 | WC-Brandywine | Independent | West Chester, PA | |||
| Ossie France | france001oss | 1891 | 3/28-8/9 | Sacramento Senators | California League | Sacramento, CA | |
| Ossie France | france001oss | 1891 | 8/19-10/4 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Frank | 1891 | Meadville | New York-Pennsylvania League | Meadville, NY | |||
| Frankeburg | 1891 | Webb City | Southwest League | Webb City, MO | |||
| E. R. Franks | 1891 | Weir City | Southwest League | Weir City, KS | |||
| Frawley | frawle002--- | 1891 | +6/5- | Meriden | Connecticut State League | Meriden, CT | |
| Frazer | frazer003--- | 1891 | Chicago Franklins | Chicago City League | Chicago, IL | ||
| Frazier | frazie002--- | 1891 | Weir City | Southwest League | Weir City, KS | ||
| George Frazier | frazer001geo | 1891 | 4/25-8/25 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Buck Freeman | freema003joh | 1891 | 6/27- | 5 g. | Washington | American Association | Washington, DC |
| George Freeman | freema002geo | 1891 | Syracuse Stars | Eastern Association | Syracuse, NY | ||
| Julie Freeman | freema001jul | 1891 | 4/7-5/23 | Bellingham Bay | PugetSound | Bellingham Bay, WA | |
| Hon Fricken | fricke001ant | 1891 | 4/28-9/26 | Albany Senators | Eastern Association | Albany, NY | |
| Pat Friel | friel-001pat | 1891 | -4/9 | 2 g. | Philadelphia | American Association | Philadelphia, PA |
| Pat Friel | friel-001pat | 1891 | 4/25-8/25 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Danny Friend | friend002dan | 1891 | 5/26- | 36 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI |
| Danny Friend | friend002dan | 1891 | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | ||
| John Frye | frye--003joh | 1891 | 5/2- | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT | |
| John Frye | frye--003joh | 1891 | New York Gorhams | Independent | New York, NY | ||
| Frank Fudger | fudger001fre | 1891 | 4/7-5/23 | Bellingham Bay | PugetSound | Bellingham Bay, WA | |
| Frank Fudger | fudger001fre | 1891 | no g. | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Frank Fudger | fudger001fre | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Andy Fuller | fuller002and | 1891 | Carthage | Southwest League | Carthage, MO | ||
| Billy Fuller | fuller002wil | 1891 | 4/15-8/29 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Harry Fuller | fuller003har | 1891 | 4/30-9/2 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Harry Fuller | fuller003har | 1891 | 9/19 | 1 g. | St. Louis Browns | American Association | St. Louis, MO |
| Shorty Fuller | fuller001sho | 1891 | 135 g. | St. Louis Browns | American Association | St. Louis, MO | |
| William Funkhauser | funkha001wil | 1891 | 7 g. | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Bill Furlong | furlon002wil | 1891 | Milwaukee Brewers | Western Association | Milwaukee, WI | ||
| Eddie Fusselback | fussel001edd | 1891 | 5/18-7/29 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Eddie Fusselback | fussel001edd | 1891 | 30 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| John Gaffney | gaffne002joh | 1891 | 4/16-9/7 | Umpire | WestA | , | |
| John Gaffney | gaffne002joh | 1891-94 | 316 g. | MLB Umpire | National League | , | |
| Matt Gagen | gagen-001mat | 1891 | Bowling Green | Independent | Bowling Green, KY | ||
| Matt Gagen | gagen-001mat | 1891 | Loui.-Deppens | Independent | Louisville, KY | ||
| Galavin | galavi001--- | 1891 | Chicago Brands | Chicago City League | Chicago, IL | ||
| Gale | 1891 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |||
| John Gallagher | gallag005joh | 1891 | 5/5-6/23 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| John Gallagher | gallag005joh | 1891 | 7/4-8/29 | Olean | New York-Pennsylvania League | Olean, NY | |
| Joseph Gallagher | gallag001jos | 1891 | 77 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Joseph Gallagher | gallag001jos | 1891 | Appleton Papermakers | Wisconsin State League | Appleton, WI | ||
| Pete Galligan | gallag002jim | 1891 | Chicago Garden Citys | Chicago City League | Chicago, IL | ||
| Pud Galvin | galvin001pud | 1891 | 33 g. | Pittsburgh | National League | Pittsburgh, PA | |
| Bob Gamble | gamble001bob | 1891 | 5/16-6/11 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Jack Gans | gans--001jac | 1891 | 5/20-6/26 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| Jack Gans | gans--001jac | 1891 | 7/4-7/21 | Erie | New York-Pennsylvania League | Erie, PA | |
| Jack Gans | gans--001jac | 1891 | 40 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Billy Ganss | gans--001bil | 1891 | +5/27+ | Clev.-Rocks | Amat | Cleveland, OH | |
| Charlie Ganzel | ganzel002cha | 1891 | 70 g. | Boston | National League | Boston, MA | |
| George Ganzel | ganzel001geo | 1891 | Roanoke VA | Independent | Roanoke, VA | ||
| Gid Gardner | gardne001gid | 1891 | 4/30 | Worcester | New England League | Worcester, MA | |
| Bill Garfield | garfie001bil | 1891 | 3/28-6/6 | Oakland Colonels | California League | Oakland, CA | |
| Bill Garfield | garfie001bil | 1891 | 7/29-8/15 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Bill Garfield | garfie001bil | 1891 | -9/ | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Jim Garry | garry-001jim | 1891 | 5/6-6/10 | Waterbury | Connecticut State League | Waterbury, CT | |
| Ed Gastfield | gastfi001ed- | 1891 | Chicago Franklins | Chicago City League | Chicago, IL | ||
| Hank Gastright | gastri001han | 1891 | 35 g. | Columbus | American Association | Columbus, OH | |
| George Gates | gates-003geo | 1891 | Galveston ES Levys | Independent | Galveston, TX | ||
| Harry Gatewood | gatewo002har | 1891 | Omaha Lambs | Western Association | Omaha, NE | ||
| Frank Gatins | gatins001fra | 1891 | 6/30-7/18 | Salem | NE | , | |
| Robert Gayle | gayle-001rob | 1891 | 4/30-6/3+ | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Robert Gayle | gayle-001rob | 1891 | 31 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Gaynor | gaynor001--- | 1891 | 5/2- | Southington | Connecticut State League | Southington, CT | |
| J.F. Gazeil | gazeil001j-- | 1891 | Worcester | New England League | Worcester, MA | ||
| Geary | geary-003--- | 1891 | 4/27 | Troy Trojans | Eastern Association | Troy, NY | |
| George Geer | geer--001geo | 1891 | 5/14-6/2 | Olean | New York-Pennsylvania League | Olean, NY | |
| George Geer | geer--001geo | 1891 | 7/?- | Umpire | NY-Pa | , | |
| George Geer | geer--001geo | 1891 | 8/-8/25 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| George Geer | geer--001geo | 1891 | Norwich NY | Independent | Norwich, NY | ||
| Bill Geiss | geiss-001bil | 1891 | 4/30-8/26 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| Bill Geiss | geiss-001bil | 1891 | 9/2-9/8 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Charlie Gelbert | gelber001--- | 1891 | Scranton | Independent | Scranton, PA | ||
| Frank Genins | genins001c-- | 1891 | 4/16-9/13 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Bill George | george001bil | 1891 | 4/15-10/4 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Joe Gerhardt | gerhar001joe | 1891 | -4/29 | 2 g. | Louisville | American Association | Louisville, KY |
| Joe Gerhardt | gerhar001joe | 1891 | 5/13-9/26 | Albany Senators | Eastern Association | Albany, NY | |
| Les German | german001les | 1891 | 4/23-9/26 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Tom Gettinger | gettin001tom | 1891 | 5/14-8/15 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Tom Gettinger | gettin001tom | 1891 | 8/26-9/8 | Erie | New York-Pennsylvania League | Erie, PA | |
| Pretzels Getzien | getzie001pre | 1891 | 14 g. | Boston | National League | Boston, MA | |
| Pretzels Getzien | getzie001pre | 1891 | 1 g. | Cleveland | National League | Cleveland, OH | |
| Charles Gibbs | gibbs-005jam | 1891 | +5/13-5/24+ | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Robert Gibson | gibson006rob | 1891 | 5/18-7/6 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Whitey Gibson | gibson001whi | 1891 | 5/14-8/15 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Whitey Gibson | gibson001whi | 1891 | 8/26-9/3 | Olean | New York-Pennsylvania League | Olean, NY | |
| Gilavin | 1891 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |||
| Pete Gilbert | gilber001pet | 1891 | 139 g. | Baltimore | American Association | Baltimore, MD | |
| Peter Gildea | gildea001pet | 1891 | Bridgewater | Independent | Bridgewater, | ||
| Peter Gildea | gildea001pet | 1891 | New Bedford | Independent | New Bedford, MA | ||
| Bob Gilks | gilks-001rob | 1891 | 4/ | Cincinnati Shamrocks | Independent | Cincinnati, OH | |
| Bob Gilks | gilks-001rob | 1891 | 5/23-8/20 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Bob Gilks | gilks-001rob | 1891 | Oconto Log Drivers | Wisconsin State League | Oconto, WI | ||
| Sam Gillen | gillen001sam | 1891 | 4/30-7/21 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Sam Gillen | gillen001sam | 1891 | 8/1-8/29 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Sam Gillen | gillen001sam | 1891 | Lock Haven PA | Independent | Lock Haven, PA | ||
| Barney Gilligan | gillig001bar | 1891 | 5/1-6/5 | Lynn | New England League | Lynn, MA | |
| Lou Gilliland | gillil001lou | 1891 | 4/28-6/12 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Lou Gilliland | gillil001lou | 1891 | 6/24-9/1 | Denver Mountaineers | Western Association | Denver, CO | |
| Gillis | gillis005--- | 1891 | Calumet Red Jackets | Upper Peninsula League | Calumet, MI | ||
| Charles Gills | 1891 | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |||
| James? Gilman | 1891 | Clev.-Stars | Independent | Cleveland, OH | |||
| Jack Glasscock | glassc001jac | 1891 | 97 g. | New York | National League | New York, NY | |
| Bill Gleason | gleaso002bil | 1891 | 4/8 | MLB Umpire | American Association | , | |
| Bill Gleason | gleaso002bil | 1891 | 4/30-8/13 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Kid Gleason | gleaso002wil | 1891 | 65 g. | Philadelphia | National League | Philadelphia, PA | |
| Larry Gleason | gleaso013--- | 1891 | Butte | Independent | Butte, MT | ||
| Bob Glenalvin | glenal001bob | 1891 | 4/15-10/4 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Jot Goar | goar--001jot | 1891 | Muncie | InSt | Muncie, IN | ||
| John Godar | godar-001joh | 1891 | 4/30-8/29 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| John Godar | godar-001joh | 1891 | 9/17-10/12 | Oakland Colonels | California League | Oakland, CA | |
| Billy Goeckel | goecke001bil | 1891-92 | Canisius Col. | College | , | ||
| Tom Golden | golden001tho | 1891 | 4/30-6/16 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Jake Goldie | goldie001j-- | 1891 | Los Angeles | Calif | Los Angeles, CA | ||
| Herb Goodall | goodal001her | 1891 | 4/27-7/2 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Herb Goodall | goodal001her | 1891 | 7/19-9/25 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Bill Goodenough | gooden001bil | 1891 | 4/17-6/16 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Bill Goodenough | gooden001bil | 1891 | 6/18-8/17 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Bill Goodenough | gooden001bil | 1891 | 8/27-11/20 | Sacramento Senators | California League | Sacramento, CA | |
| George Goodhart | goodha001geo | 1891 | 5/9-8/9+ | Reading | Independent | Reading, PA | |
| George Goodhart | goodha001geo | 1891 | Lancaster PA | Independent | Lancaster, PA | ||
| Frank Goodryder | goodry001fra | 1891 | 6/6-8/26 | Olean | New York-Pennsylvania League | Olean, NY | |
| George Gore | gore--001geo | 1891 | 130 g. | New York | National League | New York, NY | |
| Ed Gorman | gorman002ed- | 1891 | Steubenville OH | Independent | Steubenville, OH | ||
| Richard Gorman | gorman001ric | 1891 | 5/20-7/18 | Salem | New England League | Salem, MA | |
| Joe Gormley | gormle001joe | 1891 | Tamaqua PA | Independent | Tamaqua, PA | ||
| Joe Gormley | gormle001joe | 1891 | 6/16 | 1 g. | Philadelphia | National League | Philadelphia, PA |
| Mike Grady | grady-002mic | 1891 | WC-Brandywines | Independent | West Chester, PA | ||
| Louis Graff | graff-001lou | 1891 | 5/10-10/4 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Ernie Gragg | gragg-001ern | 1891 | 5/4-9/7 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Graham | graham033--- | 1891 | 11/21-11/22 | Sacramento Senators | California League | Sacramento, CA | |
| James Graham | graham001jam | 1891 | 5/14-9/9 | Erie | New York-Pennsylvania League | Erie, PA | |
| Frank Grant | grant-001fra | 1891 | 5/2- | 3 g. | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT |
| Frank Grant | grant-001fra | 1891 | New York Gorhams | Independent | New York, NY | ||
| Frank Grant | grant-001fra | 1891 | Cuban Giants | Independent | Cuban, | ||
| Graulich | 1891 | +5/25+ | Norristown | Independent | Norristown, PA | ||
| Billy Graulich | grauli001lew | 1891 | 5/30-8/18 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Billy Graulich | grauli001lew | 1891 | 9/17-9/23 | 7 g. | Philadelphia | National League | Philadelphia, PA |
| Lew Graulich | grauli001wil | 1891 | , | ||||
| Eddie Graves | 1891 | U. of Pennsylvania | College | , | |||
| Bill Gray | gray--001bil | 1891 | 23 g. | Philadelphia | National League | Philadelphia, PA | |
| Greehan | greeha001--- | 1891 | 7/26-7/27 | Omaha Lambs | Western Association | Omaha, NE | |
| Green | green-022--- | 1891 | 16 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| A.B. Green | green-001a-- | 1891 | Ishpeming | Upper Peninsula League | Ishpeming, MI | ||
| Ed Green | green-002ed- | 1891 | 4/27-4/29 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Ed Green | green-002ed- | 1891 | 5/24-6/3 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Ed Green | green-002ed- | 1891 | 6/? | Bay City | Northwestern League | Bay City, MI | |
| Charles Greenleaf | 1891 | 4/30-8/1 | Worcester | New England League | Worcester, MA | ||
| Bill Greenwood | greenw001bil | 1891 | 5/22-5/29 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Bill Greenwood | greenw001bil | 1891 | 6/20-7/20 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Griffin | griffi001--- | 1891 | Mt. Pleasant | Independent | Mt. Pleasant, NH | ||
| Griffin | griffi001--- | 1891 | +5/30- | West Haven | Connecticut State League | West Haven, CT | |
| Griffin | griffi081--- | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| Mike Griffin | griffi001mik | 1891 | 134 g. | Brooklyn | National League | Brooklyn, NY | |
| Sandy Griffin | griffi001san | 1891 | 4/16-7/12 | Omaha Lambs | Western Association | Omaha, NE | |
| Sandy Griffin | griffi001san | 1891 | 20 g. | Washington | American Association | Washington, DC | |
| Clark Griffith | griffi003cla | 1891 | 4/11- | 27 g. | St. Louis Browns | American Association | St. Louis, MO |
| Clark Griffith | griffi003cla | 1891 | 10 g. | Boston | American Association | Boston, MA | |
| John Grim | grim--002joh | 1891 | 4/16-8/13 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| John Grim | grim--002joh | 1891 | 29 g. | Milwaukee | American Association | Milwaukee, WI | |
| Weir Grissinger | grissi001j-- | 1891 | Mechanicsburg | High School | , | ||
| Henry Gruber | gruber001hen | 1891 | 46 g. | Cleveland | National League | Cleveland, OH | |
| T.J. Gubbins | gubbin001t-- | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| John Guehrer | guehre001joh | 1891 | Oconto Log Drivers | Wisconsin State League | Oconto, WI | ||
| Louis Guinasso | guinas001lou | 1891 | 4/25-4/30 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Louis Guinasso | guinas001lou | 1891 | 6/17 | Woonsocket | New England League | Woonsocket, RI | |
| Louis Guinasso | guinas001lou | 1891 | 7/4-8/4 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Ad Gumbert | gumber001ad- | 1891 | 34 g. | Chicago | National League | Chicago, IL | |
| John Gunshannon | gunsha001joh | 1891 | 4/25-8/29 | Albany Senators | Eastern Association | Albany, NY | |
| Joe Gunson | gunson001joe | 1891 | 4/17-9/13 | Kansas City Blues | Western Association | Kansas City, MO | |
| Gustin | gustin001--- | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Hadden | hadden001--- | 1891 | 1 g. | Detroit Wolverines | Northwestern League | Detroit, MI | |
| George Haddock | haddoc001geo | 1891 | 58 g. | Boston | American Association | Boston, MA | |
| Alf Hagerman | hagerm001alf | 1891 | 40 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Frank Hale | hale--003fra | 1891 | Taun.-Miller & W. | Amat | Taunton, MA | ||
| James Hall | hall--041--- | 1891 | StL- | Independent | St. Louis, MO | ||
| Frank Haller | haller002fra | 1891 | +6/13+ | Mansfield PA | AllegCo | Mansfield, PA | |
| E. Halley | halley000e-- | 1891 | Norwich | Connecticut State League | Norwich, CT | ||
| James Halligan | hallig002jam | 1891 | 6/11 | Lewiston | New England League | Lewiston, ME | |
| Jocko Halligan | hallig001joc | 1891 | 4/16-7/12 | Omaha Lambs | Western Association | Omaha, NE | |
| Jocko Halligan | hallig001joc | 1891 | 61 g. | Cincinnati | National League | Cincinnati, OH | |
| Bill Hallman | hallma002wil | 1891 | 141 g. | Philadelphia | American Association | Philadelphia, PA | |
| Wilmer Hallowell | hallow001wil | 1891 | Pueblo | ColoSt | Pueblo, CO | ||
| Charlie Hallstrom | hallst001cha | 1891 | Chicago Whitings | Chicago City League | Chicago, IL | ||
| John Halpin | halpin002joh | 1891 | Calumet Red Jackets | Upper Peninsula League | Calumet, MI | ||
| Otto Hambacker | 1891 | Pueblo | ColoSt | Pueblo, CO | |||
| Charlie Hamburg | hambur003cha | 1891 | 4/17-6/16 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Charlie Hamburg | hambur003cha | 1891 | 6/18-8/17 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Joseph Hamill | hamill001jos | 1891 | 6/1- | Lowell Lowells | New England League | Lowell, MA | |
| Joseph Hamill | hamill001jos | 1891 | -7/31 | Woonsocket | New England League | Woonsocket, RI | |
| Billy Hamilton | hamilt006wil | 1891 | 133 g. | Philadelphia | National League | Philadelphia, PA | |
| Fatty Hamilton | hamilt001fat | 1891 | Weir City | Southwest League | Weir City, KS | ||
| Robert Hamilton | hamilt006rob | 1891 | 4/25-7/31 | Troy Trojans | Eastern Association | Troy, NY | |
| Sandy Hamilton | hamilt001ale | 1891 | Weir City | Southwest League | Weir City, KS | ||
| Sandy Hamilton | hamilt001ale | 1891 | Weir City | Southwest League | Weir City, KS | ||
| Stewart Hamilton | hamilt002ste | 1891 | Weir City | Southwest League | Weir City, KS | ||
| Jack Handiboe | handib001j-- | 1891 | 5/13-5/24 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Jim Handiboe | handib001jim | 1891 | 5/11-6/3+ | Bay City | Northwestern League | Bay City, MI | |
| Frank Hankinson | hankin001fra | 1891 | 4/30-8/26 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| George Hanley | hanley001geo | 1891 | 3/22- | San Jose Dukes | California League | San Jose, CA | |
| George Hanley | hanley001geo | 1891 | 6/1-6/8 | Oakland Colonels | California League | Oakland, CA | |
| George Hanley | hanley001geo | 1891 | -11/22 | San Jose Dukes | California League | San Jose, CA | |
| Hanlon | hanlon006--- | 1891 | Chicago Whitings | Chicago City League | Chicago, IL | ||
| Ned Hanlon | hanlon001ned | 1891 | 119 g. | Pittsburgh | National League | Pittsburgh, PA | |
| Pat Hannivan | hanniv001pat | 1891 | 5/1-8/11 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| M. Hanrahan | hanrah000m-- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| William Hanrahan | hanrah002wil | 1891 | 4/25-9/26 | Albany Senators | Eastern Association | Albany, NY | |
| M. Hanrahoe | 1891 | , | |||||
| Ray Hansell | hansel001ray | 1891 | 4/30-5/16 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Hanson | hanson030--- | 1891 | Chicago Brands | Chicago City League | Chicago, IL | ||
| Albert Hapeman | hapema001alb | 1891 | 8/23-9/5 | Sacramento Senators | California League | Sacramento, CA | |
| Charles Harder | harder000cha | 1891 | Chicago Garden Citys | Chicago City League | Chicago, IL | ||
| Lou Hardie | hardie001lou | 1891 | 4/30-6/26 | Oakland Colonels | California League | Oakland, CA | |
| Lou Hardie | hardie001lou | 1891 | -8/5 | 15 g. | Baltimore | American Association | Baltimore, MD |
| Charles Harding | 1891 | 5/9-8/8+ | Reading | Independent | Reading, PA | ||
| Harkley | harkle001--- | 1891 | Missoula | Independent | Missoula, MT | ||
| Ray Harkness | harkne001ray | 1891 | 18 g. | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| Ray Harkness | harkne001ray | 1891 | Dayton | Northwestern League | Dayton, OH | ||
| Ray Harkness | harkne001ray | 1891 | Fort Wayne | Northwestern League | Fort Wayne, IN | ||
| Harold Harland | harlan001har | 1891 | 5/1-5/16 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Dick Harley | harley001ric | 1891-92 | Georgetown Univ. | College | , | ||
| George Harper | harper003joh | 1891 | 3/22-11/22 | San Jose Dukes | California League | San Jose, CA | |
| Charles Harpster | 1891 | Missoula | Independent | Missoula, MT | |||
| Ike Harpster | harpst000ike | 1891 | Missoula | Independent | Missoula, MT | ||
| Jerry Harrington | harrin001jer | 1891 | 92 g. | Cincinnati | National League | Cincinnati, OH | |
| Joe Harrington | harrin001joe | 1891 | 7/10-7/31 | Woonsocket | New England League | Woonsocket, RI | |
| William Harrington | harrin001w-- | 1891 | 4/16-8/19 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| William Harrington | harrin005wil | 1891 | 8/2?-9/21 | Oconto Log Drivers | Wisconsin State League | Oconto, WI | |
| Frank Harris | harris005fra | 1891 | 4/30-6/25 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Frank Harris | harris005fra | 1891 | 7/5-9/2 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Hank Harris | harris001hen | 1891 | 3/22-11/22 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Abe Harrison | harris001abr | 1891 | 7/5-7/14 | Cuban Giants | Independent | Cuban, | |
| Abe? Harrison | 1891 | +5/28-6/4+ | New Britain Brass City | Connecticut State League | New Britain, CT | ||
| Garret Harrison | harris006gar | 1891 | Deadwood | Deadwood, SD | |||
| Marty Harrison | harris002mar | 1891 | Deadwood | Deadwood, SD | |||
| Hart | hart--001--- | 1891 | -9/20 | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Bill Hart | hart--004wil | 1891 | 4/16-9/11 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Billy Hart | hart--002bil | 1891 | 4/17-6/13 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Billy Hart | hart--002bil | 1891 | 6/18-8/17 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Billy Hart | hart--002bil | 1891 | 8/23-8/29 | Omaha Lambs | Western Association | Omaha, NE | |
| Tom Hart | hart--001tom | 1891 | 4/15-5/7 | 8 g. | Washington | American Association | Washington, DC |
| Tom Hart | hart--004tho | 1891 | 5/18-7/31 | Lowell Lowells | New England League | Lowell, MA | |
| George Harter | harter001geo | 1891 | 4/30-7/29 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Fred Hartman | hartma003fre | 1891 | 5/21-8/19 | Erie | New York-Pennsylvania League | Erie, PA | |
| Pat Hartnett | hartne001pat | 1891 | 4/25-8/8 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Bill Hassamaer | hassam001bil | 1891 | 3/22-8/13 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Bill Hassamaer | hassam001bil | 1891 | 8/14-11/20 | Sacramento Senators | California League | Sacramento, CA | |
| Hassett | hasset005--- | 1891 | Chicago Brands | Chicago City League | Chicago, IL | ||
| Gil Hatfield | hatfie001gil | 1891 | 134 g. | Washington | American Association | Washington, DC | |
| Perry Havens | havens001per | 1891 | Webb City | Southwest League | Webb City, MO | ||
| W.E. Havstock | havsto001w-- | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Bill Hawes | hawes-001bil | 1891 | 5/28 | Lowell Lowells | New England League | Lowell, MA | |
| Bill Hawke | hawke-001bil | 1891 | Elkton MD | Independent | Elkton, MD | ||
| Bill Hawke | hawke-001bil | 1891 | 7/ | Baltimore | American League | Baltimore, MD | |
| Bill Hawke | hawke-001bil | 1891 | +8/12-8/19+ | Potomoke City | Independent | Potomoke City, | |
| Thorny Hawkes | hawkes001tho | 1891 | Umpire | NE | , | ||
| Hawkins | hawkin029--- | 1891 | Chicago Brands | Chicago City League | Chicago, IL | ||
| Pink Hawley | hawley001eme | 1891 | Wisc.-Amateur | Amat | , | ||
| John Hayden | hayden005joh | 1891 | Winston | Winston, NC | |||
| Jackie Hayes | hayes-001jac | 1891 | Newa.-Star | Independent | Newark, NJ | ||
| Jackie Hayes | hayes-001jac | 1891 | 5/24-10/4 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| John Hayes | hayes-006joh | 1891 | 5/12-7/30 | Salem | New England League | Salem, MA | |
| Ned Hayes | hayes-001ned | 1891 | 5/1-8/1 | Worcester | New England League | Worcester, MA | |
| Hays | 1891 | 6/12-7/9 | Umpire | NW | , | ||
| Charles Hazen | hazen-001cha | 1891 | 5/14-8/22 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Egyptian Healy | healy-001egy | 1891 | 23 g. | Baltimore | American Association | Baltimore, MD | |
| James Healy | 1891 | no g. | Milwaukee Brewers | Western Association | Milwaukee, WI | ||
| Heard | heard-001--- | 1891 | 6/30 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| W. Heberling | heberl001w-- | 1891 | 7/2 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Guy Hecker | hecker001guy | 1891 | 55 g. | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Bill Heine | heine-001wil | 1891 | 5/14-9/9 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| George Hemming | hemmin002geo | 1891 | 27 g. | Brooklyn | National League | Brooklyn, NY | |
| Ducky Hemp | hemp--001duc | 1891 | 5/9-7/16 | Peoria Distillers | Northwestern League | Peoria, IL | |
| Ducky Hemp | hemp--001duc | 1891 | 7/19-7/29 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Ducky Hemp | hemp--001duc | 1891 | 31 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Ed Hengel | hengle001edw | 1891 | 4/15-6/ | Umpire | PacNW | , | |
| Moxie Hengel | hengle001mox | 1891 | 4/16-8/19 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Hengle | hengle001--- | 1891 | Calumet Red Jackets | Upper Peninsula League | Calumet, MI | ||
| Bill Hennessey | 1891 | Hoosic Falls | Independent | Hoosic Falls, NY | |||
| Joseph Hennessey | hennes003jos | 1891 | Tx | , | |||
| George Henry | henry-002geo | 1891 | 5/2-7/31 | Salem | New England League | Salem, MA | |
| John Henry | henry-007joh | 1891 | 4/25 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| John Henry | henry-007joh | 1891 | 5/11-9/2 | Troy Trojans | Eastern Association | Troy, NY | |
| Herbert | 1891 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |||
| Herman | herman015--- | 1891 | 5/1-5/6 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Joseph Herndon | herndo001jos | 1891 | 5/23-7/20 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Tom Hernon | hernon001tom | 1891 | 4/15-10/4 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Jack Hess | hess--003joh | 1891 | 5/14-8/15 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Jack Hess | hess--003joh | 1891 | 8/22-9/9 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Tom Hess | hess--001tho | 1891 | 5/4-9/26 | Albany Senators | Eastern Association | Albany, NY | |
| Hewes | hewes-001--- | 1891 | +5/6- | New Britain Brass City | Connecticut State League | New Britain, CT | |
| Mike Hickey | hickey001mik | 1891 | 5/2-6/10 | Waterbury | Connecticut State League | Waterbury, CT | |
| Higgins | higgin004--- | 1891 | 17 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Higgins | higgin008--- | 1891 | 6/3-7/30 | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| Bill Higgins | higgin001bil | 1891 | 5/1-6/9 | Lowell Lowells | New England League | Lowell, MA | |
| Bill Higgins | higgin001bil | 1891 | 6/10-8/11 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| C. Higgins | 1891 | no g. | Syracuse Stars | Eastern Association | Syracuse, NY | ||
| Belden Hill | hill--003bel | 1891 | 5/6-6/3 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Belden Hill | hill--003bel | 1891 | 7/4-7/11+ | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Belden Hill | hill--003bel | 1891 | 39 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Bill Hill | hill--002bil | 1891 | Chattanooga | Chattanooga, TN | |||
| Frank Hill | 1891 | Douglass OH | Independent | Douglass, OH | |||
| Frank Hill | hill--002fra | 1891 | Atlanta | Independent | Atlanta, GA | ||
| George Hill | hill--004geo | 1891 | Omaha NB | Independent | Omaha, NE | ||
| Sam Hill | hill--004sam | 1891 | 4 g. | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| James Hillery | hiller002jam | 1891 | 5/13-7/13 | Umpire | NW | , | |
| Hillock | hilloc002--- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| G.A. Hines | hines-001g-- | 1891 | 23 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Hunkey Hines | hines-001hun | 1891 | 3/22-11/22 | Oakland Colonels | California League | Oakland, CA | |
| Mike Hines | hines-001mik | 1891 | 4/30-6/1 | Lynn | New England League | Lynn, MA | |
| Mike Hines | hines-001mik | 1891 | 6/9-7/14 | Salem | New England League | Salem, MA | |
| Mike Hines | hines-001mik | 1891 | Evansville Hoosiers | Independent | Evansville, IN | ||
| Paul Hines | hines-001pau | 1891 | 54 g. | Washington | American Association | Washington, DC | |
| William Hoagland | 1891 | 5/16-7/8 | Umpire | NW | , | ||
| William Hoagland | 1891 | Umpire | NY-Pa | , | |||
| Mike Hobrecht | hobrig001mic | 1891 | 6/1-8/13 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| E. G. Hocking | 1891 | UppPenin | , | ||||
| George Hodson | hodson002geo | 1891 | 5/14-9/8 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| P.J. Hoff | hoff--000pj- | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| Bill Hoffer | hoffer003wil | 1891 | 5/4-8/29 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Frank Hoffman | hoffma001fra | 1891 | 3/22-11/22 | Sacramento Senators | California League | Sacramento, CA | |
| Red Hoffmaster | hoffma000red | 1891 | 5/9-8/8+ | Reading | Independent | Reading, PA | |
| Hoffner | hoffne002--- | 1891 | Danville | Independent | Danville, PA | ||
| Chick Hofford | hoffor001jos | 1891 | 4/28-5/7 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Chick Hofford | hoffor001jos | 1891 | 6/8-7/29 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Chick Hofford | hoffor001jos | 1891 | 8/7-8/14 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| George Hogreiver | hogrie001geo | 1891 | 4/17-5/9 | Kansas City Blues | Western Association | Kansas City, MO | |
| George Hogreiver | hogrie001geo | 1891 | 60 g. | Appleton Papermakers | Wisconsin State League | Appleton, WI | |
| Will Holland | hollan007wil | 1891 | 64 g. | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Bug Holliday | hollid001bug | 1891 | 111 g. | Cincinnati | National League | Cincinnati, OH | |
| Edward Holliday | hollid001edw | 1891 | 5/8 | San Jose Dukes | California League | San Jose, CA | |
| Edward Holliday | hollid001edw | 1891 | 5/17 | Oakland Colonels | California League | Oakland, CA | |
| Edward Holliday | hollid001edw | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Edward Holliday | hollid001edw | 1891 | 9/4 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Wallace Hollingsworth | hollin001wal | 1891 | OhSt | , | |||
| Charles Hollister | 1891 | Williams Col. | College | , | |||
| Curt Hollopeter | 1891 | Oconto Log Drivers | Wisconsin State League | Oconto, WI | |||
| Cornelius Holohan | holoha001cor | 1891 | Atchison | Independent | Atchison, KS | ||
| Honan | honan-002--- | 1891 | Calumet Red Jackets | Upper Peninsula League | Calumet, MI | ||
| Marty Honan | honan-001mar | 1891 | 4/16-5/14 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Marty Honan | honan-001mar | 1891 | -6/15 | 5 g. | Chicago | National League | Chicago, IL |
| Charlie Hoover | hoover001cha | 1891 | 3/22-5/9 | Sacramento Senators | California League | Sacramento, CA | |
| William Hoover | hoover001bus | 1891 | 4/17-9/13 | Kansas City Blues | Western Association | Kansas City, MO | |
| William Hoover | 1891 | 6/20-6/30 | Umpire | EastA | , | ||
| George Hopkins | 1891 | Chicago Unions | Independent | Chicago, IL | |||
| James Hopkins | 1891 | 4/30-6/14 | Salem | New England League | Salem, MA | ||
| Jack Horner | horner002jac | 1891 | 4/25-8/11 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Jack Horner | horner002jac | 1891 | no g. | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Joe Hornung | hornun001mik | 1891 | 4/25-9/26 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Charles Hoskins | hoskin002cha | 1891 | 5/1-8/26 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| Charlie Householder | househ002cha | 1891 | 6/25-7/3 | Erie | New York-Pennsylvania League | Erie, PA | |
| Ed Householder | househ001edw | 1891 | Charleroi PA | Independent | Charleroi, PA | ||
| Houseman | 1891 | UppPenin | , | ||||
| Houseman | housem001--- | 1891 | Chicago Brands | Chicago City League | Chicago, IL | ||
| John Houseman | housem002joh | 1891 | 5/9-5/18 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Bert Howard | howard002ber | 1891 | Williams Col. | College | , | ||
| Henry Howe | howe--001hen | 1891 | IA | semi-pro | , IA | ||
| Dummy Howell | howell001dum | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| Billy Hoy | hoy---001wil | 1891 | 139 g. | St. Louis Browns | American Association | St. Louis, MO | |
| Hoyt | hoyt--002--- | 1891 | 6/22-6/27 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| W. Hubbard | hubbar001w-- | 1891 | 7/24-7/30 | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Hudson | hudson001--- | 1891 | Calumet Red Jackets | Upper Peninsula League | Calumet, MI | ||
| Hughes | hughes055--- | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| Edward Hughes | hughes008edw | 1891 | 9 g. | Sacramento Senators | California League | Sacramento, CA | |
| J.J. Hughes | hughes004j-- | 1891 | Marquette Undertakers | Upper Peninsula League | Marquette, WI | ||
| Jack Hughes | hughes001jac | 1891 | 5/16 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| William Hughes | hughes009wil | 1891 | Philipsburg MT | Independent | Phillipsburg, MT | ||
| Jim Hughey | hughey001jim | 1891 | 33 g. | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI | |
| Jim Hughey | hughey001jim | 1891 | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | ||
| Jim Hughey | hughey001jim | 1891 | Peru | Peru, IN | |||
| Jim Hughey | hughey001jim | 1891 | 9/29- | 2 g. | Milwaukee | American Association | Milwaukee, WI |
| Harry Hulin | hulin-001har | 1891 | 5/9-5/16 | Oakland Colonels | California League | Oakland, CA | |
| Harry Hulin | hulin-001har | 1891 | 8/8-8/13 | Sacramento Senators | California League | Sacramento, CA | |
| Bill Hunter | hunter001bil | 1891 | Hegewisch | ChicCity | Chicago, IL | ||
| Hurch | 1891 | Tacoma | Pacific Northwestern League | Tacoma, WA | |||
| Hurd | hurd--005--- | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| Barney Hurley | hurley001bar | 1891 | NbSt | , | |||
| Jerry Hurley | hurley002jer | 1891 | -7/13 | 24 g. | Cincinnati | American Association | Cincinnati, OH |
| Jerry Hurley | hurley002jer | 1891 | Ilion NY? | Ilion, NY | |||
| Jerry Hurley | hurley002jer | 1891 | 8/8-9/16 | Oakland Colonels | California League | Oakland, CA | |
| Jerry Hurley | hurley002jer | 1891 | 9/18-9/19 | San Jose Dukes | California League | San Jose, CA | |
| Tim Hurst | hurst-001tim | 1891-97 | 4/22- | MLB Umpire | National League | , | |
| Bill Husted | husted001bil | 1891 | 5/22-7/8 | Kansas City Blues | Western Association | Kansas City, MO | |
| Jack Huston | huston001jac | 1891 | 3/22-5/24 | Sacramento Senators | California League | Sacramento, CA | |
| Jack Huston | huston001jac | 1891 | 5/24-10/4 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Jack Huston | huston001jac | 1891 | 10/22-11/22 | Sacramento Senators | California League | Sacramento, CA | |
| Ed Hutchinson | hutchi002ed- | 1891 | 73 g. | Sacramento Senators | California League | Sacramento, CA | |
| Ed Hutchinson | hutchi002ed- | 1891 | 8/22-10/4 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Bill Hutchison | hutchi001bil | 1891 | 67 g. | Chicago | National League | Chicago, IL | |
| E. H. Hutchison | 1891 | 8/22-10/4 | Tacoma | Pacific Northwestern League | Tacoma, WA | ||
| Albert Ike | ike---001alb | 1891 | 40 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Bert Inks | inks--001ber | 1891 | 5/10-6/27? | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Bert Inks | inks--001ber | 1891 | 7/2-8/17 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Bert Inks | inks--001ber | 1891 | 9/2- | 13 g. | Brooklyn | National League | Brooklyn, NY |
| Will Inks | inks--001wil | 1891 | 5/9-6/30 | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Ben Ireland | irelan001ben | 1891 | 4/30-6/5+ | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Ben Ireland | irelan001ben | 1891 | 52 g. | Appleton Papermakers | Wisconsin State League | Appleton, WI | |
| Ben Ireland | irelan001ben | 1891 | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI | ||
| Irwin | irwin-015--- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| Arthur Irwin | irwin-001art | 1891 | 6 g. | Boston | American Association | Boston, MA | |
| Charlie Irwin | irwin-001cha | 1891 | 101 g. | Seattle | Pacific Northwestern League | Seattle, WA | |
| John Irwin | irwin-001joh | 1891 | 4/16-5/1 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| John Irwin | irwin-001joh | 1891 | 19 g. | Boston | American Association | Boston, MA | |
| John Irwin | irwin-001joh | 1891 | 14 g. | Louisville | American Association | Louisville, KY | |
| Nick Ivory | ivory-001nic | 1891 | Peru | Independent | Peru, IN | ||
| Nick Ivory | ivory-001nic | 1891 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | ||
| Jackson | jackso051--- | 1891 | 7/19 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Jackson | jackso009--- | 1891 | 8/16-8/21 | Sacramento Senators | California League | Sacramento, CA | |
| Jackson | jackso031--- | 1891 | 10/4 | Oakland Colonels | California League | Oakland, CA | |
| Andy Jackson | jackso005and | 1891 | New York Big Gorhams | Independent | New York, NY | ||
| Bill Jackson | jackso001bil | 1891 | 5/5-6/4 | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT | |
| Bill Jackson | jackso001bil | 1891 | 4/21-9/6 | Cuban Giants | Independent | Cuban, | |
| Bob Jackson | jackso001bob | 1891 | 5/2-6/4 | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT | |
| Oscar Jackson | jackso001osc | 1891 | New York Big Gorhams | Independent | New York, NY | ||
| Jack Jamieson | jamies001jac | 1891 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | ||
| Duke Jantzen | jantze001a-- | 1891 | Calumet Red Jackets | Upper Peninsula League | Calumet, MI | ||
| Duke Jantzen | jantze001a-- | 1891 | 5/12-5/23 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Duke Jantzen | jantze001a-- | 1891 | 16 g. | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI | |
| Andrew Jennings | 1891 | 1 g. | MLB Umpire | American Association | , | ||
| Hughie Jennings | jennin001hug | 1891 | Lehighton PA | Independent | Lehighton, PA | ||
| Hughie Jennings | jennin001hug | 1891 | 6/1- | 88 g. | Louisville | American Association | Louisville, KY |
| Fred Jevne | jevne-001fre | 1891 | 5/9-7/26+ | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| Ralph Joanes | joanes001ral | 1891 | 4/30-9/2 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Johns | johns-003--- | 1891 | +5/6- | New Britain Brass City | Connecticut State League | New Britain, CT | |
| Johnson | johnso073--- | 1891 | +6/5- | Meriden | Connecticut State League | Meriden, CT | |
| Johnson | johnso172--- | 1891 | Mt. Pleasant | Independent | Mt. Pleasant, NH | ||
| Johnson | johnso172--- | 1891 | +5/30- | West Haven | Connecticut State League | West Haven, CT | |
| Abbie Johnson | johnso002abb | 1891 | London | Independent | London, ON | ||
| Abbie Johnson | johnso002abb | 1891 | London | Independent | London, ON | ||
| Lefty Johnson | johnso001bil | 1891 | 129 g. | Baltimore | American Association | Baltimore, MD | |
| Lou Johnson | johnso026joh | 1891 | Weir City | Southwest League | Weir City, KS | ||
| Lou Johnson | johnso026joh | 1891 | 5/1-7/19 | Kansas City Blues | Western Association | Kansas City, MO | |
| Lou Johnson | johnso026joh | 1891 | 8/14-8/25 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Spud Johnson | johnso001spu | 1891 | -8/8 | 80 g. | Cleveland | National League | Cleveland, OH |
| Youngy Johnson | johnso002you | 1891 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | ||
| Johnston | johnst027--- | 1891 | +6/21+ | Chicago Brands | Chicago City League | Chicago, IL | |
| Johnston | johnst027--- | 1891 | Pullman IL YMCA | Independent | Pullman, IL | ||
| Johnston | johnst027--- | 1891-92 | Pullman AC | Independent | Pullman, IL | ||
| Dick Johnston | johnst001dic | 1891 | 99 g. | Cincinnati | American Association | Cincinnati, OH | |
| Jones | jones-110--- | 1891 | 4/30-5/11 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Jones | jones-110--- | 1891 | Tacoma | Pacific Northwestern League | Tacoma, WA | ||
| Abe Jones | 1891 | Chicago Unions | Independent | Chicago, IL | |||
| Alex Jones | jones-002ale | 1891 | 5/14-8/15 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Alex Jones | jones-002ale | 1891 | 8/22-9/9 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Bumpus Jones | jones-011cha | 1891 | 4/30-5/20 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Bumpus Jones | jones-011cha | 1891 | 5/30-6/16 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Bumpus Jones | jones-011cha | 1891 | 6/19-7/8 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Bumpus Jones | jones-011cha | 1891 | 7/18-8/3 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Bumpus Jones | jones-011cha | 1891 | 8/10-10/4 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Charles Jones | jones-022cha | 1891 | FtWayne-E.Fs | CityLeag | Fort Wayne, IN | ||
| Charley Jones | jones-018cha | 1891 | -7/21 | 76 g. | MLB Umpire | American Association | , |
| Charlie Jones | jones-019cha | 1891 | 4/25-6/11 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Charlie Jones | jones-019cha | 1891 | 6/23-8/29 | Troy Trojans | Eastern Association | Troy, NY | |
| Henry Jones | jones-007hen | 1891 | 5/14-9/9 | Erie | New York-Pennsylvania League | Erie, PA | |
| J. D. E. Jones | 1891 | Brown Univ. | College | , | |||
| J. D. E. Jones | 1891 | Northampton | Independent | Northampton, MA | |||
| Joseph Jones | jones-010jos | 1891 | 7/16-8/7 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Mike Jones | jones-002mik | 1891 | Hami.-WalkerHouse | Amateur | Hamilton, ON | ||
| Jordan | jordan012--- | 1891 | Calumet Red Jackets | Upper Peninsula League | Calumet, MI | ||
| Mike Jordan | jordan001mik | 1891 | 5/14-5/16 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Mike Jordan | jordan001mik | 1891 | 6/2-7/21 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Bill Joyce | joyce-001bil | 1891 | 65 g. | Boston | American Association | Boston, MA | |
| James Judd | judd--001jam | 1891 | 5/6-8/1 | Worcester | New England League | Worcester, MA | |
| Charles Justi | justi-000cha | 1891 | Chicago Franklins | Chicago City League | Chicago, IL | ||
| E. J. Kagan | 1891 | no g. | Syracuse Stars | Eastern Association | Syracuse, NY | ||
| Jerry Kane | kane--004jer | 1891 | 4/30-6/12 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Jerry Kane | kane--004jer | 1891 | 6/25-7/20 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Henry Kappel | kappel001hei | 1891 | 4/25-9/26 | Albany Senators | Eastern Association | Albany, NY | |
| Joe Kappel | kappel001joe | 1891 | 5/9-7/16 | Peoria Distillers | Northwestern League | Peoria, IL | |
| Joe Kappel | kappel001joe | 1891 | 7/19-7/29 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Joe Kappel | kappel001joe | 1891 | 31 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Joe Kappel | kappel001joe | 1891 | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | ||
| Joe Katz | katz--002jos | 1891 | 70 g. | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Joe Katz | katz--002jos | 1891 | 8/11-9/7 | Kansas City Blues | Western Association | Kansas City, MO | |
| Tom Kearns | kearns001tom | 1891 | 4/25-8/11 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Ed Keas | keas--001ed- | 1891 | 4/30-6/10 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| Forest Keay | keay--002for | 1891 | 4/30-8/1 | Portland | New England League | Portland, ME | |
| George Keefe | keefe-002geo | 1891 | 5 g. | Washington | American Association | Washington, DC | |
| George Keefe | keefe-002geo | 1891 | 5/30-6/13 | Peoria Distillers | Northwestern League | Peoria, IL | |
| John Keefe | keefe-001joh | 1891 | 4/18-6/19 | Denver Mountaineers | Western Association | Denver, CO | |
| John Keefe | keefe-001joh | 1891 | 7/20 | Kansas City Blues | Western Association | Kansas City, MO | |
| John Keefe | keefe-001joh | 1891 | 7/29-8/18 | Omaha Lambs | Western Association | Omaha, NE | |
| Tim Keefe | keefe-002tim | 1891 | 8 g. | New York | National League | New York, NY | |
| Tim Keefe | keefe-002tim | 1891 | 11 g. | Philadelphia | National League | Philadelphia, PA | |
| Harry Keefer | keefer001har | 1891 | Winston | Independent | Winston, NC | ||
| Willie Keeler | keeler001wil | 1891 | Plainfield NJ | Independent | Plainfield, NJ | ||
| Jack Keenan | keenan001kid | 1891 | 36 g. | Dayton | Northwestern League | Dayton, OH | |
| Jack Keenan | keenan001kid | 1891 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | ||
| Jack Keenan | keenan001kid | 1891 | 8/11 | 1 g. | Cincinnati | American Association | Cincinnati, OH |
| Jack Keenan | keenan001jac | 1891 | 4/16-6/17 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Jack Keenan | keenan001jac | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Jim Keenan | keenan001jim | 1891 | 75 g. | Cincinnati | National League | Cincinnati, OH | |
| Adam Keifer | keifer001ada | 1891 | 64 g. | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Billy Keim | keim--001bil | 1891 | Deadwood | Deadwood, SD | |||
| Edward Kelley | kelley001edw | 1891 | 6/25-7/30 | Portland | New England League | Portland, ME | |
| James Kelley | 1891 | 4/25-6/26 | Umpire | EastA | , | ||
| Joe Kelley | kelley002jos | 1891 | 5/1-7/23 | Lowell Lowells | New England League | Lowell, MA | |
| Joe Kelley | kelley002jos | 1891 | 7/27- | 12 g. | Boston | National League | Boston, MA |
| Richard Kelley | kelley003ric | 1891 | 5/14-9/9 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Nate Kellogg | kellog001nat | 1891 | 6/30-7/25 | Lewiston | New England League | Lewiston, ME | |
| George Kelly | kelly-005geo | 1891 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | ||
| J. J. Kelly | 1891 | no g. | New Haven Nutmegs | Eastern Association | New Haven, CT | ||
| King Kelly | kelly-002kin | 1891 | 82 g. | Cincinnati | American Association | Cincinnati, OH | |
| King Kelly | kelly-002kin | 1891 | 4 g. | Boston | American Association | Boston, MA | |
| King Kelly | kelly-002kin | 1891 | 16 g. | Boston | National League | Boston, MA | |
| John Kelty | kelty-001joh | 1891 | 5/13-6/9 | Hartford | Connecticut State League | Hartford, CT | |
| Kennedy | kenned051--- | 1891 | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | ||
| Brickyard Kennedy | kenned005wil | 1891 | 4/17-9/12 | Denver Mountaineers | Western Association | Denver, CO | |
| Doc Kennedy | kenned001doc | 1891 | 4/25-9/26 | Albany Senators | Eastern Association | Albany, NY | |
| Kennelly | kennel000--- | 1891 | Chicago Brands | Chicago City League | Chicago, IL | ||
| Matt Keogan | keogan001mat | 1891 | Houghton | Upper Peninsula League | Houghton, MI | ||
| John Kerins | kerins001joh | 1891 | 137 g. | MLB Umpire | American Association | , | |
| Kerken | 1891 | 4/30-6/2 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | ||
| J. J. Kerrigan | 1891 | no g. | Albany Senators | Eastern Association | Albany, NY | ||
| Kerstein | 1891 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |||
| Larry Ketrick | ketric001lar | 1891 | Scranton | Independent | Scranton, PA | ||
| Keys | 1891 | 29 g. | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | ||
| Wm. Kidd | kidd--001wm- | 1891 | +5/6- | New Britain Brass City | Connecticut State League | New Britain, CT | |
| George Kihm | kihm--001geo | 1891 | Delphos OH | Independent | Delphos, OH | ||
| John Kiley | kiley-001joh | 1891 | 5/7 | 1 g. | Boston | National League | Boston, MA |
| John Kiley | kiley-001joh | 1891 | 5/15-7/3 | Salem | New England League | Salem, MA | |
| John Kiley | kiley-001joh | 1891 | 7/15-7/18 | Lewiston | New England League | Lewiston, ME | |
| Henry Killeen | killee002hen | 1891 | 5/1-8/26 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| Henry Killeen | killee002hen | 1891 | 9/11 | 1 g. | Cleveland | National League | Cleveland, OH |
| Frank Killen | killen002fra | 1891 | 4/17-8/19 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Frank Killen | killen002fra | 1891 | 8/27- | 11 g. | Milwaukee | American Association | Milwaukee, WI |
| Charles Kilpatrick | 1891 | Umpire | UppPenin | , | |||
| Charles Kilpatrick | 1891 | Umpire | WiSt | , | |||
| Matt Kilroy | kilroy001mat | 1891 | 8 g. | Cincinnati | American Association | Cincinnati, OH | |
| Mike Kilroy | kilroy001mik | 1891 | -5/8 | 3 g. | Philadelphia | National League | Philadelphia, PA |
| Mike Kilroy | kilroy001mik | 1891 | 6/29-8/25 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Mike Kilroy | kilroy001mik | 1891 | 9/3-9/24 | Albany Senators | Eastern Association | Albany, NY | |
| H. L. Kimball | 1891 | Salt Lake City | Salt Lake City, UT | ||||
| Kinery | kinery001--- | 1891 | +5/13- | Southington | Connecticut State League | Southington, CT | |
| Silver King | king--001sil | 1891 | 49 g. | Pittsburgh | National League | Pittsburgh, PA | |
| William King | 1891 | Chicago Unions | Independent | Chicago, IL | |||
| Ed Kinnare | kinnar000ed- | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| John Kinney | kinney002joh | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| William Kinsler | kinsle001wil | 1891 | Manhattan Col. | College | , | ||
| Tom Kinslow | kinslo001tom | 1891 | 61 g. | Brooklyn | National League | Brooklyn, NY | |
| F. Kinzie | kinzie000f-- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| Walt Kinzie | kinzie001wal | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| Lee Kipp | kipp--002lee | 1891 | 8/21-8/29 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| John Kirby | kirby-002joh | 1891 | 5/9-7/16 | Peoria Distillers | Northwestern League | Peoria, IL | |
| John Kirby | kirby-002joh | 1891 | 26 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI | |
| Albert Kirmes | kirmes001alb | 1891 | 5/2-7/13 | Salem | New England League | Salem, MA | |
| Lewis Kirstein | 1891 | 7/3-7/10 | Rochester Hop Bitters | Eastern Association | Rochester, NY | ||
| Malachi Kittridge | kittri001mal | 1891 | 79 g. | Chicago | National League | Chicago, IL | |
| Klevney | klevne001--- | 1891 | 5/2-5/5 | Waterbury | Connecticut State League | Waterbury, CT | |
| Bill Kling | kling-001bil | 1891 | 4/30-8/6 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Bill Kling | kling-001bil | 1891 | 8/13- | 13 g. | Philadelphia | National League | Philadelphia, PA |
| Gus Klopf | klopf-001gus | 1891 | 4/15-10/4 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Billy Klusman | klusma001bil | 1891 | 5/14-9/9 | Olean | New York-Pennsylvania League | Olean, NY | |
| Frank Knauss | knauss001fra | 1891 | 3 g. | Cleveland | National League | Cleveland, OH | |
| Russell Kneisley | kneisl001rus | 1891 | College | College | , | ||
| Phil Knell | knell-001phi | 1891 | 66 g. | Columbus | American Association | Columbus, OH | |
| Joe Knight | knight002jos | 1891 | 4/25-8/22 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Lon Knight | knight001lon | 1891 | 4/16-9/12 | Umpire | WestA | , | |
| Ed Knouff | knouff001ed- | 1891 | 6/1-6/25 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Jimmy Knowles | knowle001jim | 1891 | 4/25-9/26 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Andy Knox | knox--001and | 1891 | 4/30-7/21 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Dick Knox | knox--002ric | 1891 | 34 g. | Dayton | Northwestern League | Dayton, OH | |
| Dick Knox | knox--002ric | 1891 | 6/25-8/22 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| Dick Knox | knox--002ric | 1891 | 9/7-9/26 | Troy Trojans | Eastern Association | Troy, NY | |
| Lola Kolb | kolb--001lol | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Harry Koons | koons-001har | 1891 | 6/19-6/26 | Erie | New York-Pennsylvania League | Erie, PA | |
| Charlie Krehmeyer | krehme001cha | 1891 | Houston | Independent | Houston, TX | ||
| Charlie Krehmeyer | krehme001cha | 1891 | 53 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Bill Krieg | krieg-001bil | 1891 | no g. | Peoria Distillers | Northwestern League | Peoria, IL | |
| Gus Krock | krock-001gus | 1891 | 6/9 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Gus Krock | krock-001gus | 1891 | 7/25-7/27 | Omaha Lambs | Western Association | Omaha, NE | |
| Bill Kuehne | kuehne001bil | 1891 | 68 g. | Columbus | American Association | Columbus, OH | |
| Bill Kuehne | kuehne001bil | 1891 | 39 g. | Louisville | American Association | Louisville, KY | |
| George Kurtz | kurtz-001geo | 1891 | 5/4-6/12 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| M.J. Kurtz | kurtz-001m-- | 1891 | 7/27-9/8 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| A.D. Kynar | kynar-001a-- | 1891 | 54 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| George LaChance | lachan001geo | 1891 | 5/2-6/10 | Waterbury | Connecticut State League | Waterbury, CT | |
| Lachner | lachne001--- | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| Steve Ladew | ladew-001ste | 1891 | 5/27-6/29 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Fred Lake | lake--001fre | 1891 | 5/7- | 5 g. | Boston | National League | Boston, MA |
| Dan Lally | lally-001dan | 1891 | 4/27-8/14 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Dan Lally | lally-001dan | 1891 | 8/19- | 41 g. | Pittsburgh | National League | Pittsburgh, PA |
| Gus Land | land--001gus | 1891 | 5/15-8/15 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Gus Land | land--001gus | 1891 | Umpire | NY-Pa | , | ||
| Franklin Lang | lang--002fra | 1891 | 6/19-8/14 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Franklin Lang | lang--002fra | 1891 | 8/19-8/25 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Bill Lange | lange-001bil | 1891 | Santa Rosa CA | Santa Rosa, CA | |||
| Bill Lange | lange-001bil | 1891 | Port Townsend | PugetSound | Port Townsend, WA | ||
| Bill Lange | lange-001bil | 1891 | 6/3-10/4 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Bob Langsford | langsf001bob | 1891 | 5/9-7/15 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Bob Langsford | langsf001bob | 1891 | 7/30 | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| Henry Lanser | lanser001hen | 1891 | 5/14-8/29 | Erie | New York-Pennsylvania League | Erie, PA | |
| Henry Lanser | lanser001hen | 1891 | 9/3-9/9 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Addison Lansing | 1891 | U. of Pennsylvania | College | , | |||
| Henry Larkin | larkin001hen | 1891 | 133 g. | Philadelphia | American Association | Philadelphia, PA | |
| Sam LaRocque | larocq001sam | 1891 | - 5/31 | 1 g. | Pittsburgh | National League | Pittsburgh, PA |
| Sam LaRocque | larocq001sam | 1891 | 10 g. | Louisville | American Association | Louisville, KY | |
| Sam LaRocque | larocq001sam | 1891 | 6/6-6/16 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Sam LaRocque | larocq001sam | 1891 | 6/18-8/16 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Sam LaRocque | larocq001sam | 1891 | 16 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Arlie Latham | latham002wal | 1891 | 135 g. | Cincinnati | National League | Cincinnati, OH | |
| Chuck Lauer | lauer-001chu | 1891 | 63 g. | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| J. Lauer | 1891 | Chicago Garden Citys | Chicago City League | Chicago, IL | |||
| Lautenback | lauten001--- | 1891 | 6/17-6/25 | Lynn | New England League | Lynn, MA | |
| Jack Lawlor | lawlor001joh | 1891 | Middletown NY | Independent | Middletown, NY | ||
| John Lawlor | 1891 | , | |||||
| Lawrence | lawren039--- | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| Edgar Lawrence | lawren001edg | 1891 | 5/14-5/16 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Mike Lawrence | lawren001wal | 1891 | 5/4-5/28 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Mike Lawrence | lawren016--- | 1891 | 51 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI | |
| Mike Lawrence | lawren001mic | 1891 | Sanford FL | Independent | Sanford, FL | ||
| Walter? Lawrence | 1891 | Appleton Papermakers | Wisconsin State League | Appleton, WI | |||
| Lawson | lawson001--- | 1891 | +5/19- | Bristol-Plainville | Connecticut State League | Bristol, CT | |
| Al Lawson | lawson001al- | 1891 | Jan. | Barnstorming Cuba | , | ||
| Al Lawson | lawson001al- | 1891 | 1/1- | Ocala FL | Independent | Ocala, FL | |
| Al Lawson | lawson001al- | 1891 | 3/ | Gainesville FL | Independent | Gainsville, FL | |
| Al Lawson | lawson001al- | 1891 | 4/25-5/6 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Al Lawson | lawson001al- | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Al Lawson | lawson001al- | 1891 | 7/4-7/19 | Oakland Colonels | California League | Oakland, CA | |
| Al Lawson | lawson001al- | 1891 | 8/13-8/15 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| Eddie Leach | leach-001edg | 1891 | Wash.-CAC | Independent | Washington, DC | ||
| Eddie Leach | leach-001edg | 1891 | Jersey City NJ | Amat | Jersey City, NJ | ||
| Bob Leadley | leadle001rob | 1891 | -7/10 | g. | Cleveland | National League | Cleveland, OH |
| Bob Leadley | leadle001rob | 1891 | 7/25-9/13 | Omaha Lambs | Western Association | Omaha, NE | |
| Tom Leahy | leahy-002tho | 1891 | Holy Cross Col. | College | , | ||
| Tom Leahy | leahy-002tho | 1891 | 5/2-6/10 | Waterbury | Connecticut State League | Waterbury, CT | |
| William Leamon | leamon001wil | 1891 | 5/9-7/16 | Dayton | Northwestern League | Dayton, OH | |
| William Leamon | leamon001wil | 1891 | 7/24-7/30 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| Thomas Leary | leary-001tho | 1891 | 6/10-6/16 | Woonsocket | New England League | Woonsocket, RI | |
| H. Lee | lee---002h-- | 1891 | Chicago Whitings | Chicago City League | Chicago, IL | ||
| Martin Lee | lee---007mar | 1891 | Wausen WI | Independent | Wausen, WI | ||
| Llewellyn Legg | legg--001lle | 1891 | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | ||
| Jack Legrande | legran001jac | 1891 | West Haven | Connecticut State League | West Haven, CT | ||
| Jack Legrande | legran001jac | 1891 | +5/27- | Portland | New England League | Portland, ME | |
| Jack Legrande | legran001jac | 1891 | NH-Reserves | Independent | , NH | ||
| Jack Legrande | legran001jac | 1891 | Southington | Connecticut State League | Southington, CT | ||
| Jack Legrande | legran001jac | 1891 | Portland | Connecticut State League | Portland, CT | ||
| Mike Lehane | lehane001mik | 1891 | -10/4 | 137 g. | Columbus | American Association | Columbus, OH |
| John Leighton | leight002joh | 1891 | 4/25 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| John Leighton | leight002joh | 1891 | 4/30-8/1 | Manchester Amskoegs | New England League | Manchester, NH | |
| John Leighton | leight002joh | 1891 | Manchester Amskoegs | Independent | Manchester, NH | ||
| Jack Leiper | leiper001jac | 1891 | Cape May | Independent | Cape May, NJ | ||
| Jack Leiper | leiper001jac | 1891 | 9/4-10/4 | 6 g. | Columbus | American Association | Columbus, OH |
| Harry Lemons | lemons001har | 1891 | 6/30 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Frank Leonard | leonar001fra | 1891 | 4/30-8/1 | Portland | New England League | Portland, ME | |
| Mike Lestrange | lestra001mik | 1891 | +6/10- | Southington | Connecticut State League | Southington, CT | |
| Tom Letcher | letche001tom | 1891 | 84 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Tom Letcher | letche001tom | 1891 | 9/27-10/4 | 6 g. | Milwaukee | American Association | Milwaukee, WI |
| Charlie Levis | levis-001cha | 1891 | 5/14-8/15 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| David Levy | levy--001dav | 1891 | 5/10 | Sacramento Senators | California League | Sacramento, CA | |
| Rube Levy | levy--001reu | 1891 | 3/22-11/22 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Fred Link | link--002fre | 1891 | 5/15-8/15 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Fred Link | link--002fre | 1891 | 8/28-9/7 | Olean | New York-Pennsylvania League | Olean, NY | |
| Abel Lizotte | lizott001abe | 1891 | 6/10-8/1 | Lewiston | New England League | Lewiston, ME | |
| Joseph Lizotte | lizott001jos | 1891 | 5/1-6/4 | Worcester | New England League | Worcester, MA | |
| Joseph Lizotte | lizott001jos | 1891 | 6/10-8/1 | Lewiston | New England League | Lewiston, ME | |
| Edward Lockwood | lockwo001edw | 1891 | 5/9-6/2 | Hartford | Connecticut State League | Hartford, CT | |
| Martin Loftus | loftus001mar | 1891 | Allentown | Allentown, PA | |||
| Tom Loftus | loftus002tom | 1891 | Cincinnati | National League | Cincinnati, OH | ||
| Joe Lohbeck | lohbec001jos | 1891 | 4/16-9/10 | Denver Mountaineers | Western Association | Denver, CO | |
| Pete Lohman | lohman001geo | 1891 | 3/22-4/30 | Oakland Colonels | California League | Oakland, CA | |
| Pete Lohman | lohman001geo | 1891 | 5/11-7/20 | 32 g. | Washington | American Association | Washington, DC |
| Thomas Lollard | 1891 | St.Jo.-Browns | s-p | St. Joseph, MO | |||
| Long | 1891 | 5/6 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | ||
| Billy Long | long--001bil | 1891 | 5/2-5/9 | Lynn | New England League | Lynn, MA | |
| Billy Long | long--001bil | 1891 | 5/13-5/15 | Salem | New England League | Salem, MA | |
| Dan Long | long--003dan | 1891 | 3/22-9/5 | Oakland Colonels | California League | Oakland, CA | |
| Denny Long | long--002den | 1891 | Birmingham | So | Birmingham, AL | ||
| F.M. Long | long--001f-- | 1891 | ChicCity | , | |||
| F.M. Long | long--001f-- | 1891 | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | ||
| Herman Long | long--001her | 1891 | 139 g. | Boston | National League | Boston, MA | |
| Jim Long | long--002jim | 1891 | 8/9- | 6 g. | Louisville | American Association | Louisville, KY |
| Longworth | 1891 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |||
| Jacob Lookabaugh | lookab001jac | 1891 | 3/28-11/22 | San Jose Dukes | California League | San Jose, CA | |
| Frank Loughran | loughr001fra | 1891 | 9/10-9/13 | Oakland Colonels | California League | Oakland, CA | |
| Luther Louser | lauser001hen | 1891 | +7/29+ | Leba.-Annville | Independent | Lebanon, PA | |
| Love | 1891 | Roch.-Athletics | Independent | Rochester, NY | |||
| E. T. Love | 1891 | New Albany IN | Independent | New Albany, IN | |||
| Tom Lovett | lovett001tom | 1891 | 44 g. | Brooklyn | National League | Brooklyn, NY | |
| Bobby Lowe | lowe--002rob | 1891 | 125 g. | Boston | National League | Boston, MA | |
| Luby | 1891 | 5/17- | Umpire | ChicCity | , | ||
| Pat Luby | luby--001pat | 1891 | 32 g. | Chicago | National League | Chicago, IL | |
| Con Lucid | lucid-001con | 1891 | Webb City | Southwest League | Webb City, MO | ||
| Puss Luck | luck--001pus | 1891 | +9/25+ | Richmond VA | Independent | Richmond, VA | |
| Luckey | luckey002--- | 1891 | 8 g. | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Luebka | luebke001--- | 1891 | Reading Pasttimes | Independent | Reading, PA | ||
| Lufkin | lufkin001--- | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Al Lukens | lukens001al- | 1891 | Jeansville | CoalLeague | Jeansville, PA | ||
| Al Lukens | lukens001al- | 1891 | Riverton NJ | Independent | Riverton, NJ | ||
| Will Lund | lund--001wil | 1891 | 4 g. | Bay City | Northwestern League | Bay City, MI | |
| Luke Lutenberg | lutenb001luk | 1891 | 40 g. | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| Luke Lutenberg | lutenb001luk | 1891 | 7/30-9/8 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Lynch | lynch-049--- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| Lynch | lynch-050--- | 1891 | Chicago Garden Citys | Chicago City League | Chicago, IL | ||
| Henry Lynch | lynch-003hen | 1891 | 4/30-8/1 | Worcester | New England League | Worcester, MA | |
| Henry Lynch | lynch-003hen | 1891 | 8/7-9/26 | Troy Trojans | Eastern Association | Troy, NY | |
| Patrick Lynch | lynch-002pat | 1891 | 4/30-9/2 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Timothy Lynch | lynch-002tim | 1891 | 6/10-7/29 | Woonsocket | New England League | Woonsocket, RI | |
| Tom Lynch | lynch-002tom | 1891 | 5/29-6/7 | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Tom Lynch | lynch-002tom | 1891 | 11 g. | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Lyons | lyons-033--- | 1891 | Mt. Pleasant | Independent | Mt. Pleasant, NH | ||
| Lyons | lyons-033--- | 1891 | +5/30- | West Haven | Connecticut State League | West Haven, CT | |
| Lyons | lyons-053--- | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| Denny Lyons | lyons-002den | 1891 | 120 g. | St. Louis Browns | American Association | St. Louis, MO | |
| Harry Lyons | lyons-001har | 1891 | 4/2-5/9 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Pat Lyons | lyons-003pat | 1891 | 5/14-8/15 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| Toby Lyons | lyons-001tob | 1891 | 3/22-4/24 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Toby Lyons | lyons-001tob | 1891 | 5/9-5/13 | Salem | New England League | Salem, MA | |
| Toby Lyons | lyons-001tob | 1891 | 7/20 | MLB Umpire | American Association | , | |
| Lyston | 1891 | 4/27 | Baltimore Monumentals | Independent | Baltimore, MD | ||
| John Lyston | lyston001joh | 1891 | 5/ | St. Louis Browns | American Association | St. Louis, MO | |
| John Lyston | lyston001joh | 1891 | +5/21 | Winston | Independent | Winston, NC | |
| John Lyston | lyston001joh | 1891 | 6/16 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| John Lyston | lyston001joh | 1891 | 6/27-8/1 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| John Lyston | lyston001joh | 1891 | 8/29 | 1 g. | Columbus | American Association | Columbus, OH |
| Mortimer Lyston | lyston001mor | 1891 | +5/21-9/26+ | Winston | Independent | Winston, NC | |
| Dad Lytle | lytle-001dad | 1891 | 4/15-10/4 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Harry Mace | mace--002har | 1891 | 5/5-5/13 | 3 g. | Washington | American Association | Washington, DC |
| Harry Mace | mace--002har | 1891 | 3 g. | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Mack | 1891 | 6/10-6/13 | Detroit Wolverines | Northwestern League | Detroit, MI | ||
| Mack | mack--002--- | 1891 | Denver Mountaineers | Western Association | Denver, CO | ||
| Connie Mack | mack--001con | 1891 | 75 g. | Pittsburgh | National League | Pittsburgh, PA | |
| Reddy Mack | mack--001red | 1891 | 4/25-9/26 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Gus Mackey | mackey001c-- | 1891 | Lawrence KS | Independent | Lawrence, KS | ||
| John Mackey | mackey002joh | 1891 | 37 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Jimmy Macullar | macull001jim | 1891-92 | -9/28 | MLB Umpire | American Association | , | |
| Kid Madden | madden001kid | 1891 | 1 g. | Boston | American Association | Boston, MA | |
| Kid Madden | madden001kid | 1891 | 38 g. | Baltimore | American Association | Baltimore, MD | |
| Billy Magee | magee-002bil | 1891 | 4/30-7/19 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| William Magill | magill001w-- | 1891 | Brown Univ. | College | , | ||
| William Magill | magill001w-- | 1891 | 6/20 | Woonsocket | New England League | Woonsocket, RI | |
| William Magill | magill001w-- | 1891 | Northampton | Independent | Northampton, MA | ||
| George Magoon | magoon001geo | 1891 | Milford MA | s-p | Milford, MA | ||
| Henry Maguire | maguir001hen | 1891 | 7/20-7/23 | Lowell Lowells | New England League | Lowell, MA | |
| James Maguire | maguir003jam | 1891 | 4/25-8/1 | Troy Trojans | Eastern Association | Troy, NY | |
| James Maguire | maguir003jam | 1891 | 8/7-8/9 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Tom Maguire | maguir001tho | 1891 | Vallejo | CentCalif | Vallejo, CA | ||
| Henry Mahler | mahler001--- | 1891 | 5/30-Â | Lanc.-Active | Independent | Lancaster, PA | |
| Dan Mahoney | mahone003dan | 1891 | no g. | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Dan Mahoney | mahone003dan | 1891 | Northampton | Independent | Northampton, MA | ||
| David Mahoney | mahone001j-- | 1891 | 4/25-6/ | Troy Trojans | Eastern Association | Troy, NY | |
| Ed Mahoney | mahone001ed- | 1891 | 6/13 | Woonsocket | New England League | Woonsocket, RI | |
| Ed Mahoney | mahone001ed- | 1891 | 6/20 | Portland | New England League | Portland, ME | |
| Michael Mahoney | mahone002mic | 1891 | Umpire | NE | , | ||
| Michael Mahoney | mahone002mic | 1891 | 7/22- | 49 g. | MLB Umpire | American Association | , |
| Willard Mains | mains-001wil | 1891 | 31 g. | Cincinnati | American Association | Cincinnati, OH | |
| Willard Mains | mains-001wil | 1891 | 2 g. | Milwaukee | American Association | Milwaukee, WI | |
| William Mains | 1891 | no g. | Kansas City Blues | Western Association | Kansas City, MO | ||
| Will Mair | mair--001wil | 1891 | 4/30-6/16 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Will Mair | mair--001wil | 1891 | 6/19-7/25+ | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Will Mair | mair--001wil | 1891 | 8/8-9/2 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Frank Mallott | mallot001fra | 1891 | Scranton | Independent | Scranton, PA | ||
| William Malone | malone008wil | 1891 | New York Big Gorhams | Independent | New York, NY | ||
| Fred Mann | mann--001fre | 1891 | no g. | Salem | New England League | Salem, MA | |
| Al Mannassau | mannas001al- | 1891 | 4/15-10/4 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Manning | mannin007--- | 1891 | 5/14 | Lowell Lowells | New England League | Lowell, MA | |
| Jim Manning | mannin001jim | 1891 | 4/17-9/13 | Kansas City Blues | Western Association | Kansas City, MO | |
| Tim Manning | mannin001tim | 1891 | +5/20+ | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Tim Manning | mannin001tim | 1891 | 5/30-9/8 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Mike Mansell | mansel001mik | 1891 | 4/28-8/11 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Frank March | march-001fra | 1891 | 4/15-10/4 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Claude Marcum | marcum001cla | 1891 | Fort Scott | Southwest League | Fort Scott, KS | ||
| Marker | marker001--- | 1891 | 7 g. | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Maroney | marone004--- | 1891 | 6/12 | Lewiston | New England League | Lewiston, ME | |
| Lefty Marr | marr--001lef | 1891 | 72 g. | Cincinnati | National League | Cincinnati, OH | |
| Lefty Marr | marr--001lef | 1891 | 14 g. | Cincinnati | American Association | Cincinnati, OH | |
| Ed Mars | mars--001ed- | 1891 | FL | , | |||
| Ed Mars | mars--001ed- | 1891 | 4/17-5/24 | Oakland Colonels | California League | Oakland, CA | |
| Ed Mars | mars--001ed- | 1891 | +6/14-6/27+ | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| Martin | martin022--- | 1891 | 35 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| G.H. Martin | martin002g-- | 1891 | 35 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Leech Maskrey | maskre001lee | 1891 | 4/30-10/1 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| William Mather | mather002wil | 1891 | 6/23-7/31 | Woonsocket | New England League | Woonsocket, RI | |
| Bobby Mathews | mathew001bob | 1891 | -6/16 | 37 g. | MLB Umpire | American Association | , |
| Charles Matthews | matthe001cha | 1891 | -9/ | Camden | Independent | Camden, NJ | |
| Charles Matthews | matthe001cha | 1891 | 9/25 | 1 g. | Philadelphia | American Association | Philadelphia, PA |
| Charles Matthews | matthe001cha | 1891 | 10/- | Camden | Independent | Camden, NJ | |
| Wilson Matthews | matthe004wil | 1891-94 | Princeton Univ. | College | , | ||
| Mike Mattimore | mattim001mik | 1891 | 6/27-7/21 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Mike Mattimore | mattim001mik | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Hal Mauck | mauck-001hal | 1891 | 5/- | 36 g. | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI |
| Fred Mauer | brooks001hen | 1891 | Honesdale PA | Independent | Honesdale, PA | ||
| Al Maul | maul--001alb | 1891 | 47 g. | Pittsburgh | National League | Pittsburgh, PA | |
| George Maurer | maurer003geo | 1891 | no g. | Olean | New York-Pennsylvania League | Olean, NY | |
| George Maurer | maurer003geo | 1891 | 15 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Patrick May | may---001pat | 1891 | 5/27-6/5 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Patrick May | may---001pat | 1891 | 6/29 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Mayer | mayer-001--- | 1891 | 5/20 | Olean | New York-Pennsylvania League | Olean, NY | |
| Ed Mayer | mayer-001ed- | 1891 | 68 g. | Philadelphia | National League | Philadelphia, PA | |
| John Mayer | mayer-001joh | 1891 | 5/14-6/1 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Al Mays | mays--001al- | 1891 | 5/23-9/9 | Erie | New York-Pennsylvania League | Erie, PA | |
| Patrick Mays | mays--001pat | 1891 | 5/29 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| John McAdams | mcadam002joh | 1891 | Chicago Garden Citys | Chicago City League | Chicago, IL | ||
| Jimmy McAleer | mcalee001jam | 1891 | 136 g. | Cleveland | National League | Cleveland, OH | |
| Joseph McAllister | mcalli001jos | 1891 | Lebanon Cedars | Eastern Association | Lebanon, PA | ||
| McBride | 1891 | Chester-Kurtz | Independent | Chester, PA | |||
| Algie McBride | mcbrid001alg | 1891 | , | ||||
| J.E. McCabe | mccabe000je- | 1891 | Chicago Brands | Chicago City League | Chicago, IL | ||
| Sparrow McCaffrey | mccaff001spa | 1891 | 4/25-9/22 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Jack McCann | mccann001jac | 1891 | 52 g. | Dayton | Northwestern League | Dayton, OH | |
| James McCann | mccann001jam | 1891 | 7/23-9/9 | Erie | New York-Pennsylvania League | Erie, PA | |
| McCarthy | mccart057--- | 1891 | 5/25 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| McCarthy | mccart023--- | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| McCarthy | mccart023--- | 1891 | Wardner ID | Independent | Wardner, ID | ||
| McCarthy | mccart038--- | 1891 | 5/9-5/17 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Jack McCarthy | mccart003joh | 1891 | Holy Cross Col. | College | , | ||
| Jack McCarthy | mccart003joh | 1891 | 4/30-5/4 | Lynn | New England League | Lynn, MA | |
| Jack McCarthy | mccart003joh | 1891 | 6/19-8/1 | Manchester Amskoegs | New England League | Manchester, NH | |
| Jack McCarthy | mccart004jac | 1891 | SF Will & Fincks | CentCal | San Francisco, CA | ||
| Jack McCarthy | mccart004jac | 1891 | SRosa/SF/Napa | CentCal | Santa Rosa, CA | ||
| Tommy McCarthy | mccart001tom | 1891 | 134 g. | St. Louis Browns | American Association | St. Louis, MO | |
| John McCarty | mccart014joh | 1891 | 4/28 | Kansas City Blues | Western Association | Kansas City, MO | |
| Al McCauley | mccaul001al- | 1891 | 4/16-7/12 | Omaha Lambs | Western Association | Omaha, NE | |
| Al McCauley | mccaul001al- | 1891 | -10/6 | 59 g. | Washington | American Association | Washington, DC |
| Bill McClellan | mcclel001bil | 1891 | 4/16-7/12 | Denver Mountaineers | Western Association | Denver, CO | |
| Bill McClellan | mcclel001bil | 1891 | 7/29-9/13 | Omaha Lambs | Western Association | Omaha, NE | |
| John McCloskey | mcclos001joh | 1891 | 3/22-11/22 | Sacramento Senators | California League | Sacramento, CA | |
| McConnell | mcconn016--- | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| McConnell | mcconn004--- | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| McCormick | mccorm020--- | 1891 | 8/13 | Sacramento Senators | California League | Sacramento, CA | |
| Jerry McCormick | mccorm001jer | 1891 | 4/25-5/23 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Jerry McCormick | mccorm001jer | 1891 | 8/15-8/17 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Jim McCormick | mccorm002jim | 1891 | 5/14-5/20 | Erie | New York-Pennsylvania League | Erie, PA | |
| Joe McCormick | mccorm000joe | 1891 | Chicago Garden Citys | Chicago City League | Chicago, IL | ||
| William McCormick | mccorm003wil | 1891 | Seattle | Independent | Seattle, WA | ||
| Pete McCoy | mccoy-001pet | 1891 | 5/18-5/29 | Peoria Distillers | Northwestern League | Peoria, IL | |
| McCullough | 1891 | 7/9-8/11 | Umpire | EastA | , | ||
| Charlie McCullough | mccull002cha | 1891 | 5/1-7/2 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Charlie McCullough | mccull002cha | 1891 | 8/1-9/9 | Olean | New York-Pennsylvania League | Olean, NY | |
| McCurdy | mccurd002--- | 1891 | Chicago Garden Citys | Chicago City League | Chicago, IL | ||
| McDermott | mcderm015--- | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| Michael McDermott | mcderm003mic | 1891 | 5/22- | Portland | New England League | Portland, ME | |
| Michael McDermott | mcderm003mic | 1891 | -7/15 | Woonsocket | New England League | Woonsocket, RI | |
| Sandy McDermott | mcderm001san | 1891 | 4/15-10/4 | Umpire | PacNW | , | |
| Tom McDermott | mcderm005tho | 1891 | 4/25-5/23 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Tom McDermott | mcderm005tho | 1891 | 5/28-6/16 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Tom McDermott | mcderm005tho | 1891 | 6/17-7/31 | Woonsocket | New England League | Woonsocket, RI | |
| McDonald | mcdona062--- | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| Edward McDonald | mcdona003edw | 1891 | 6/26-7/6 | Lynn | New England League | Lynn, MA | |
| Edward McDonald | mcdona003edw | 1891 | 7/8-8/25 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Jim McDonald | mcdona003jim | 1891 | Port Townsend | PugetSound | Port Townsend, WA | ||
| Jim McDonald | mcdona003jim | 1891 | 6/10-7/16 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Jim McDonald | mcdona003jim | 1891 | 8/9 | Sacramento Senators | California League | Sacramento, CA | |
| Jim McDonald | mcdona003jim | 1891 | 11/21-11/22 | Sacramento Senators | California League | Sacramento, CA | |
| Guy McFadden | mcfadd001guy | 1891 | Parsons | Southwest League | Parsons, KS | ||
| Alex McFarlan | mcfarl002ale | 1891 | WiSt | , | |||
| Alex McFarlan | mcfarl002ale | 1891 | 4/30-5/5 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Alex McFarlan | mcfarl002ale | 1891 | Youngstown | Youngstown, OH | |||
| Horace McFarlan | mcfarl001hor | 1891 | Jerseyville | Jerseyville, | |||
| Ambrose McGann | mcgann001amb | 1891 | Baltimore | Independent | Baltimore, MD | ||
| Ambrose McGann | mcgann001amb | 1891 | 8/-Â | Winston | Independent | Winston, NC | |
| Andrew McGann | mcgann001and | 1891 | +8/11+ | Winston | Independent | Winston, NC | |
| Dan McGann | mcgann001den | 1891 | Shelbyville | BlueGrass | Shelbyville, IL | ||
| Chippy McGarr | mcgarr001chi | 1891 | 4/16-9/13 | Denver Mountaineers | Western Association | Denver, CO | |
| Mcgarrity | mcgarr002--- | 1891 | 5/2-6/9 | Hartford | Connecticut State League | Hartford, CT | |
| Jack McGeachey | mcgeac001jac | 1891 | 50 g. | Philadelphia | American Association | Philadelphia, PA | |
| Jack McGeachey | mcgeac001jac | 1891 | 41 g. | Boston | American Association | Boston, MA | |
| McGee | mcgee-012--- | 1891 | 8/1-8/25 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Willie McGill | mcgill005wil | 1891 | 8 g. | Cincinnati | American Association | Cincinnati, OH | |
| Willie McGill | mcgill005wil | 1891 | 33 g. | St. Louis Browns | American Association | St. Louis, MO | |
| McGilligen | 1891 | Hartford | Connecticut State League | Hartford, CT | |||
| Billy McGinley | mcginl001--- | 1891 | Sheboygan | Independent | Sheboygan, WI | ||
| Dennis McGinley | mcginl001den | 1891 | Sheboygan | Independent | Sheboygan, WI | ||
| Ed Mcginn | mcginn001ed- | 1891 | 5/11-5/18 | Lynn | New England League | Lynn, MA | |
| C.J. McGinnis | mcginn000cj- | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| Gus McGinnis | mcginn001gus | 1891 | 34 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| McGivern | mcgive002--- | 1891 | Roch.-Hudson | Independent | Rochester, NY | ||
| John McGlone | mcglon001joh | 1891 | 4/16-5/17 | Detroit Wolverines | Northwestern League | Detroit, MI | |
| John McGlone | mcglon001joh | 1891 | 5/20-8/19 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| John McGlone | mcglon001joh | 1891 | 8/22-9/13 | Omaha Lambs | Western Association | Omaha, NE | |
| John McGlone | mcglon001joh | 1891 | Denver Mountaineers | Western Association | Denver, CO | ||
| James Mcgovern | mcgove001jam | 1891 | 4/30- | Portland | New England League | Portland, ME | |
| James Mcgovern | mcgove001jam | 1891 | -5/28 | Lynn | New England League | Lynn, MA | |
| McGrath | mcgrat016--- | 1891 | 5/17-10/25 | Chicago Brands | Chicago City League | Chicago, IL | |
| James Mcgrath | mcgrat001jam | 1891 | 5/1- | Worcester | New England League | Worcester, MA | |
| James Mcgrath | mcgrat001jam | 1891 | -7/23 | Lowell Lowells | New England League | Lowell, MA | |
| J. M. McGraw | 1891 | no g. | Fort Wayne | Northwestern League | Fort Wayne, IN | ||
| John McGraw | mcgraw003joh | 1891 | , | ||||
| John McGraw | mcgraw003joh | 1891 | Gainesville FL | Independent | Gainsville, FL | ||
| John McGraw | mcgraw003joh | 1891 | Ocala FL | Independent | Ocala, FL | ||
| John McGraw | mcgraw003joh | 1891 | 4/30-8/20 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| John McGraw | mcgraw003joh | 1891 | 8/26- | 33 g. | Baltimore | American Association | Baltimore, MD |
| Patrick McGreevy | mcgree001pat | 1891 | Middletown NY | Independent | Middletown, NY | ||
| Mark McGrillis | mcgril001mar | 1891-92 | U. of Pennsylvania | College | , | ||
| Joe McGuckin | mcguck001joe | 1891 | 3/28-11/22 | San Jose Dukes | California League | San Jose, CA | |
| Deacon McGuire | mcguir006jam | 1891 | 114 g. | Washington | American Association | Washington, DC | |
| James Mcguire | mcguir008jam | 1891 | 5/2-6/9 | Hartford | Connecticut State League | Hartford, CT | |
| Thomas McGuirk | mcguir004tho | 1891 | 3/22-11/22 | Sacramento Senators | California League | Sacramento, CA | |
| Bill McGunnigle | mcgunn001bil | 1891 | 5/29 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Bill McGunnigle | mcgunn001bil | 1891 | 7/- | g. | Pittsburgh | National League | Pittsburgh, PA |
| McHale | mchale001--- | 1891 | 5/29 | Erie | New York-Pennsylvania League | Erie, PA | |
| Bob McHale | mchale001bob | 1891 | 6/13 | San Jose Dukes | California League | San Jose, CA | |
| Bob McHale | mchale001bob | 1891 | 7/17 | Oakland Colonels | California League | Oakland, CA | |
| Bob McHale | mchale001bob | 1891 | 7/23-7/31 | San Jose Dukes | California League | San Jose, CA | |
| Bob McHale | mchale001bob | 1891 | 8/6 | Oakland Colonels | California League | Oakland, CA | |
| Bob McHale | mchale001bob | 1891 | 8/8-11/22 | Sacramento Senators | California League | Sacramento, CA | |
| G.H. McHale | mchale001g-- | 1891 | 5/16-6/16 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| G.H. McHale | mchale001g-- | 1891 | 6/19-8/17 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| G.H. McHale | mchale001g-- | 1891 | 8/- | Oconto Log Drivers | Wisconsin State League | Oconto, WI | |
| John McHale | mchale002joh | 1891 | 5/14-8/1 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Hook Mcilhaney | mcilha001hoo | 1891 | Weir City | Southwest League | Weir City, KS | ||
| Butch McIntyre | mcinty001cha | 1891 | 43 g. | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI | |
| Ed McKean | mckean001edw | 1891 | 141 g. | Cleveland | National League | Cleveland, OH | |
| James McKenna | mckenn006jam | 1891 | Oconto Log Drivers | Wisconsin State League | Oconto, WI | ||
| Dave McKeough | mckeou001dav | 1891 | -6/12 | 15 g. | Philadelphia | American Association | Philadelphia, PA |
| Dave McKeough | mckeou001dav | 1891 | 7/8-9/19 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Byron McKibben | mckibb001byr | 1891 | Hastings NB | Independent | Hastings, NE | ||
| McLaughlin | mclaug048--- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| Barney McLaughlin | mclaug001bar | 1891 | 4/30-8/1 | Portland | New England League | Portland, ME | |
| Frank McLaughlin | mclaug001fra | 1891 | 6/8-6/11 | Lynn | New England League | Lynn, MA | |
| Michael McLaughlin | mclaug004mic | 1891 | NJ | , | |||
| Michael McLaughlin | 1891 | 4/30-9/4 | Umpire | Il-Ia | , | ||
| Thomas McLaughlin | 1891 | 9/12-10/4 | MLB Umpire | American Association | , | ||
| Tom McLaughlin | mclaug001tom | 1891 | 4/27-8/25 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Tom McLaughlin | mclaug001tom | 1891 | -10/3 | 14 g. | Washington | American Association | Washington, DC |
| Andrew McMahon | mcmaho001and | 1891 | 6/10-7/8 | Woonsocket | New England League | Woonsocket, RI | |
| Jack McMahon | mcmaho001jac | 1891 | 4/19-6/15 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Jack McMahon | mcmaho001jac | 1891 | 6/28-8/16 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Jack McMahon | mcmaho006joh | 1891 | 84 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Sadie McMahon | mcmaho003joh | 1891 | 61 g. | Baltimore | American Association | Baltimore, MD | |
| McManus | mcmanu004--- | 1891 | 4 g. | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Michael Mcmanus | mcmanu002mic | 1891 | 6/10-6/27 | Woonsocket | New England League | Woonsocket, RI | |
| McMillan | mcmill019--- | 1891 | Chicago Whitings | Chicago City League | Chicago, IL | ||
| George McMillan | mcmill001geo | 1891 | 59 g. | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| George McMillan | mcmill001geo | 1891 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | ||
| George McMillan | mcmill001geo | 1891 | 15 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Peter McNabb | mcnabb001edg | 1891 | 6/19-8/13 | Denver Mountaineers | Western Association | Denver, CO | |
| Peter McNabb | mcnabb001edg | 1891 | 8/22-9/10 | Omaha Lambs | Western Association | Omaha, NE | |
| Peter McNabb | mcnabb001edg | 1891 | 9/20-10/4 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Jim Mcneilly | mcneil001jim | 1891 | 8/11 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Bid McPhee | mcphee001bid | 1891 | 138 g. | Cincinnati | National League | Cincinnati, OH | |
| McQuaid | mcquai007--- | 1891 | Chicago Garden Citys | Chicago City League | Chicago, IL | ||
| Mart McQuaid | mcquai001mor | 1891 | 3/22-4/26 | Oakland Colonels | California League | Oakland, CA | |
| Mart McQuaid | mcquai001mor | 1891 | 5/3-8/9 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Mart McQuaid | mcquai001mor | 1891 | 8/15- | 4 g. | St. Louis Browns | American Association | St. Louis, MO |
| Mox McQuery | mcquer001mox | 1891 | -7/25 | 68 g. | Washington | American Association | Washington, DC |
| Mox McQuery | mcquer001mox | 1891 | 8/2-9/26 | Troy Trojans | Eastern Association | Troy, NY | |
| Paul McSweeney | mcswee001pau | 1891 | 9/20-9/22 | 3 g. | St. Louis Browns | American Association | St. Louis, MO |
| Jim McTamany | mctama001jim | 1891 | 81 g. | Columbus | American Association | Columbus, OH | |
| Jim McTamany | mctama001jim | 1891 | 58 g. | Philadelphia | American Association | Philadelphia, PA | |
| Carl McVey | mcvey-001car | 1891 | 3/22-11/22 | San Jose Dukes | California League | San Jose, CA | |
| George McVey | mcvey-001geo | 1891 | 4/15-6/18 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| George McVey | mcvey-001geo | 1891 | -9/9 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | |
| Mattie McVicker | mcvick001mat | 1891 | 4/30-9/8 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| James Meade | meade-001jam | 1891 | 6/24- 7/18 | Salem | New England League | Salem, MA | |
| George Meakim | meakim001geo | 1891 | 6 g. | Philadelphia | American Association | Philadelphia, PA | |
| George Meakim | meakim001geo | 1891 | 6/8-9/13 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Jack Meara | meara-001jac | 1891 | 5/1-7/18 | Lowell Lowells | New England League | Lowell, MA | |
| Jack Meara | meara-001jac | 1891 | 7/24-9/9 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Pete Meegan | meegan001pet | 1891 | 8/29-9/4 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Meehan | meehan015--- | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| Jouett Meekin | meekin002jou | 1891 | 4/19-6/4 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Jouett Meekin | meekin002jou | 1891 | 6/13- | 32 g. | Louisville | American Association | Louisville, KY |
| George Meister | meiste001geo | 1891 | 55 g. | Dayton | Northwestern League | Dayton, OH | |
| John Meister | meiste002joh | 1891 | 5/4-7/14 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| John Menefee | menefe001joh | 1891 | 5/16-9/9 | Erie | New York-Pennsylvania League | Erie, PA | |
| Tom Menefee | menefe001tho | 1891 | Great Falls MT | Independent | Great Falls, MT | ||
| Claude Meredyth | meredy001cla | 1891 | Eminence | Eminence, | |||
| Merlock | 1891 | Hartford | Connecticut State League | Hartford, CT | |||
| Bill Merritt | merrit001bil | 1891 | 6/11-7/31 | Woonsocket | New England League | Woonsocket, RI | |
| Bill Merritt | merrit001bil | 1891 | 8/8- | 11 g. | Chicago | National League | Chicago, IL |
| Jack Messitt | messit001jac | 1891 | 4/25-9/16 | Troy Trojans | Eastern Association | Troy, NY | |
| F. Mienke | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | |||
| F. Mienke | mienke000f-- | 1891 | Chicago Brands | Chicago City League | Chicago, IL | ||
| Jake Milbee | milbee001jos | 1891 | 5/14-8/17 | Erie | New York-Pennsylvania League | Erie, PA | |
| Miller | miller129--- | 1891 | Marquette Undertakers | Upper Peninsula League | Marquette, WI | ||
| Miller | miller171--- | 1891 | 5/1-5/15 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Miller | miller139--- | 1891 | 8/15 | Omaha Lambs | Western Association | Omaha, NE | |
| A. Miller | miller006a-- | 1891 | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | ||
| Bob Miller | miller001bob | 1891 | 5/3 | Troy Trojans | Eastern Association | Troy, NY | |
| Bob Miller | miller001bob | 1891 | -7/14 | 7 g. | Washington | American Association | Washington, DC |
| Frederick Miller | miller006fre | 1891 | 5/4-9/8 | Erie | New York-Pennsylvania League | Erie, PA | |
| George Miller | miller005geo | 1891 | 135 g. | Pittsburgh | National League | Pittsburgh, PA | |
| Joe Miller | miller005joe | 1891 | 4/25-5/18 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Joe Miller | miller005joe | 1891 | 6/19-6/22 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Joe Miller | miller005joe | 1891 | Duluth | Independent | Duluth, MN | ||
| Kohly Miller | miller001koh | 1891 | 5/9-8/8+ | Reading | Independent | Reading, PA | |
| Tommy Miller | miller002tom | 1891 | 4/25-8/24 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Tommy Miller | miller002tom | 1891 | 9/21 | Albany Senators | Eastern Association | Albany, NY | |
| John Milligan | millig001joc | 1891 | 118 g. | Philadelphia | American Association | Philadelphia, PA | |
| Jack Millman | millma001jac | 1891 | +6/4-7/10+ | Norristown | Independent | Norristown, PA | |
| Lynn Mills | mills-001lyn | 1891 | 48 g. | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Sam Mills | mills-001sam | 1891 | 4/30-7/22 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Sam Mills | mills-001sam | 1891 | -9/ | 34 g. | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI |
| Dan Minnehan | minneh001dan | 1891 | 4/16-8/16 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Dan Minnehan | minneh001dan | 1891 | 22 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI | |
| Mishler | mishle001--- | 1891 | Lancaster | Independent | Lancaster, PA | ||
| John Mitchell | mitche019joh | 1891 | 4/16-8/19 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Mohler | 1891 | Washburn Col. | College | , | |||
| Kid Mohler | mohler001kid | 1891 | 4/30-6/13 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Kid Mohler | mohler001kid | 1891 | Pittsburg | Independent | Pittsburg, KS | ||
| Kid Mohler | mohler001kid | 1891 | Beatrice | Independent | Beatrice, NE | ||
| Timothy Montague | montag001tim | 1891 | 5/1-6/13 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Hiram Montel | montel001hir | 1891 | 5/14-6/6 | Olean | New York-Pennsylvania League | Olean, NY | |
| Hiram Montel | montel001hir | 1891 | 6/13-6/30 | Lewiston | New England League | Lewiston, ME | |
| J.C. Moody | moody-000jc- | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| Harry Mooney | mooney001har | 1891 | 6/9-6/10 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Harry Mooney | mooney001har | 1891 | Braddock Browns | Independent | Braddock, PA | ||
| Harry Mooney | mooney001har | 1891 | 8/5 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| William Mooney | mooney002wil | 1891 | 4/25-6/1 | Troy Trojans | Eastern Association | Troy, NY | |
| William Mooney | mooney002wil | 1891 | 6/5-8/25 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Moore | moore-010--- | 1891 | 11 g. | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Moore | moore-008--- | 1891 | 6/30 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Alfred Moore | moore-001alf | 1891 | 4/30-8/1 | Worcester | New England League | Worcester, MA | |
| Charlie Moore | moore-016cha | 1891 | 5/14-5/30 | Erie | New York-Pennsylvania League | Erie, PA | |
| Dutch Moore | moore-003c-- | 1891 | 5/14-8/15 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| John Moore | moore-020joh | 1891 | 4/15-4/30 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Zeke Moore | moore-001zek | 1891 | Camden | Independent | Camden, NJ | ||
| Andrew Moran | moran-001and | 1891 | 5/2-6/29 | Salem | New England League | Salem, MA | |
| Andrew Moran | moran-001and | 1891 | 7/3-7/23 | Lowell Lowells | New England League | Lowell, MA | |
| Augie Moran | moran-002aug | 1891 | Waterbury | Connecticut State League | Waterbury, CT | ||
| Bill Moran | moran-001bil | 1891 | 4/30-9/8 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Harry Morelock | morelo001har | 1891 | 8/21- | 4 g. | Philadelphia | National League | Philadelphia, PA |
| Morgan | morgan015--- | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| Morgan | morgan008--- | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Gene Moriarty | moriar001gen | 1891 | 4/30-9/1 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Johnny Morin | morin-000joh | 1891 | Missoula | Independent | Missoula, MT | ||
| John Morrill | morril003joh | 1891 | 5/2-5/12 | Salem | New England League | Salem, MA | |
| John Morrill | morril003joh | 1891 | 6/2- | 11 g. | MLB Umpire | National League | , |
| Morrison | morris072--- | 1891 | 6/3-6/17 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| J. A. Morrison | 1891 | no g. | Lowell Lowells | New England League | Lowell, MA | ||
| Mike Morrison | morris001mik | 1891 | 5/9-6/7 | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Mike Morrison | morris001mik | 1891 | 6/14-7/30 | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| Mike Morrison | morris001mik | 1891 | 8/3 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Mike Morrison | morris001mik | 1891 | 8/23-8/24 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Tom Morrison | morris002tom | 1891 | StL-J. D. Hudson | Independent | St. Louis, MO | ||
| Tom Morrissey | morris003tom | 1891 | 4/16-8/24 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Charles Morse | morse-001cha | 1891 | 4/30-5/19 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Charles Morse | morse-001cha | 1891 | 7/20-8/1 | Lewiston | New England League | Lewiston, ME | |
| S.J. Mortland | mortla001s-- | 1891 | Burlington | Independent | Burlington, IA | ||
| Charlie Morton | morton002cha | 1891 | 5/19-6/24 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Charlie Morton | morton002cha | 1891 | 8/25 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Harry Morton | morton003har | 1891 | +9/20+ | Chicago Brands | Chicago City League | Chicago, IL | |
| Sam Morton | morton001sam | 1891 | Minneapolis Millers | Western Association | Minneapolis, MN | ||
| Mott | mott--002--- | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| Frank Motz | motz--001fra | 1891 | 4/15-10/4 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| William Motz | motz--002wil | 1891 | Shelbyville IL | Independent | Shelbyville, IL | ||
| Mueller | muelle004--- | 1891 | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | ||
| Thomas Mulderig | mulder000tho | 1891 | Scranton | Independent | Scranton, PA | ||
| Ed Mulhearn | mulhea001edw | 1891 | 5/18-5/27 | Detroit Wolverines | Northwestern League | Detroit, MI | |
| E.J. Mullally | mullal001e-- | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Tony Mullane | mullan001ton | 1891 | 64 g. | Cincinnati | National League | Cincinnati, OH | |
| Jim Mullee | mullee001jam | 1891 | 4/7-5/23 | Bellingham Bay | PugetSound | Bellingham Bay, WA | |
| Peter Mullen | 1891 | 10/1 | MLB Umpire | American Association | , | ||
| Joe Mulvey | mulvey001joe | 1891 | 113 g. | Philadelphia | American Association | Philadelphia, PA | |
| J.G. Munday | munday001j-- | 1891 | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | ||
| John Munyan | munyan001joh | 1891 | 60 g. | St. Louis Browns | American Association | St. Louis, MO | |
| J. Murnane | murnan001j-- | 1891 | StL-Reachmans | Independent | St. Louis, MO | ||
| Bob Murphy | murphy001bob | 1891 | 4/25-6/19 | Albany Senators | Eastern Association | Albany, NY | |
| Con Murphy | murphy001con | 1891 | 4/30-6/11 | Worcester | New England League | Worcester, MA | |
| Connie Murphy | murphy002con | 1891 | 4/30-9/8 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Connie Murphy | murphy002con | 1891 | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | ||
| Danny Murphy | murphy013dan | 1891 | 4/25-8/11 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Danny Murphy | murphy013dan | 1891 | 8/18-9/26 | Troy Trojans | Eastern Association | Troy, NY | |
| Joe Murphy | murphy003joe | 1891 | -10/25 | Chicago Whitings | Chicago City League | Chicago, IL | |
| John Murphy | murphy025joh | 1891 | 36 g. | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Larry Murphy | murphy001lar | 1891 | 4/16-5/18 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Larry Murphy | murphy001lar | 1891 | 5/30-10/6 | 101 g. | Washington | American Association | Washington, DC |
| Morgan Murphy | murphy001mor | 1891 | 106 g. | Boston | American Association | Boston, MA | |
| Pat Murphy | murphy007pat | 1891 | 4/25-7/17 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| William Murphy | murphy015wil | 1891 | 5/26- | 28 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI |
| Willie Murphy | murphy013wil | 1891 | Norwich | Connecticut State League | Norwich, CT | ||
| Billy Murray | murray007wil | 1891 | 4/30-9/8 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Miah Murray | murray001mia | 1891 | - 10/3 | 2 g. | Washington | American Association | Washington, DC |
| Tom Murray | murray008tho | 1891 | 43 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Tom Murray | murray001tom | 1891 | Rahways | Independent | , | ||
| Jim Mutrie | mutrie001jam | 1891 | New York | National League | New York, NY | ||
| Al Myers | myers-001al- | 1891 | 135 g. | Philadelphia | National League | Philadelphia, PA | |
| Billy Myers | myers-002bil | 1891 | Lincoln Rustlers | Western Association | Lincoln, NE | ||
| George Myers | myers-002geo | 1891 | 4/25-8/25 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Tom Nagle | nagle-001tom | 1891 | 8 g. | Chicago | National League | Chicago, IL | |
| Nash | nash--004--- | 1891 | 5/8-5/16 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Billy Nash | nash--001bil | 1891 | 140 g. | Boston | National League | Boston, MA | |
| Joe Neale | neale-001joe | 1891 | -6/29 | 15 g. | St. Louis Browns | American Association | St. Louis, MO |
| Joe Neale | neale-001joe | 1891 | 7/14-8/25 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Joe Neale | neale-001joe | 1891 | 8/28-9/26 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| M. Neevne | 1891 | no g. | Denver Mountaineers | Western Association | Denver, CO | ||
| John Nelson | nelson008joh | 1891 | 5/2-6/4 | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT | |
| John Nelson | nelson008joh | 1891 | 4/21-10/11 | Cuban Giants | Independent | Cuban, | |
| Mont Neves | neves-001mon | 1891 | no g. | Denver Mountaineers | Western Association | Denver, CO | |
| Mont Neves | neves-001mon | 1891 | no g. | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Mont Neves | neves-001mon | 1891 | +5/30+ | Bridgeville | AllegCo | Bridgeville, PA | |
| Jack Newell | newell001jac | 1891 | 18 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| John Newell | newell002joh | 1891 | 5/2-7/18 | Portland | New England League | Portland, ME | |
| John Newell | newell002joh | 1891 | 7/22-8/1 | 5 g. | Pittsburgh | National League | Pittsburgh, PA |
| Charlie Newman | newman003cha | 1891 | 4/15-10/4 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Jack Newman | newman002jac | 1891 | 4/27-5/8 | Omaha Lambs | Western Association | Omaha, NE | |
| Jack Newman | newman002jac | 1891 | 5/29-7/12 | Denver Mountaineers | Western Association | Denver, CO | |
| Jack Newman | newman002jac | 1891 | 7/26-9/8 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Newton | newton029--- | 1891 | Chicago Franklins | Chicago City League | Chicago, IL | ||
| Frank Nicholas | nichol002fra | 1891 | 4/30-8/1 | Manchester Amskoegs | New England League | Manchester, NH | |
| Sam Nicholl | nichol002sam | 1891 | 6/4-9/9 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Kid Nichols | nichol006cha | 1891 | 52 g. | Boston | National League | Boston, MA | |
| M. Herbert Nichols | 1891 | 6/8-6/17 | Lynn | New England League | Lynn, MA | ||
| Parson Nicholson | nichol001par | 1891 | 4/16-9/13 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| George Nicol | nicol-001geo | 1891 | 4/30-7/19 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| George Nicol | nicol-001geo | 1891 | -8/14 | 3 g. | Chicago | National League | Chicago, IL |
| George Nicol | nicol-001geo | 1891 | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | ||
| Hugh Nicol | nicol-001hug | 1891 | 4/30-9/2 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Tom Niland | niland001tom | 1891 | 4/30-7/20 | Lynn | New England League | Lynn, MA | |
| Bill Niles | niles-001bil | 1891 | 5/14-8/15 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| Nolan | nolan-022--- | 1891 | 4/28-5/16 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Nolan | nolan-007--- | 1891 | 9/2 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| William Noll | noll--001wil | 1891 | Chicago Garden Citys | Chicago City League | Chicago, IL | ||
| George Nulton | nulton001geo | 1891 | 4/15-9/14 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| O'Brien | obrien047--- | 1891 | Ishpeming | Upper Peninsula League | Ishpeming, MI | ||
| Billy O'Brien | obrien001bil | 1891 | 4/16-6/11 | Denver Mountaineers | Western Association | Denver, CO | |
| Billy O'Brien | obrien001bil | 1891 | Danville | Independent | Danville, PA | ||
| Billy O'Brien | obrien001bil | 1891 | 8/27-9/13 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Cinders O'Brien | obrien001cin | 1891 | 4/14-10/2 | 41 g. | Boston | American Association | Boston, MA |
| Darby O'Brien | obrien002dar | 1891 | 103 g. | Brooklyn | National League | Brooklyn, NY | |
| George O'Brien | obrien005geo | 1891 | 36 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Jack O'Brien | obrien002jac | 1891 | 4/17-6/16 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Jack O'Brien | obrien002jac | 1891 | 6/18-8/17 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| James O'Brien | obrien010jam | 1891 | Altoona | Independent | Altoona, PA | ||
| James O'Brien | obrien010jam | 1891 | 6/5-8/1 | Worcester | New England League | Worcester, MA | |
| Jerry O'Brien | obrien001jer | 1891 | 6/24-9/3 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Joe O'Brien | obrien002joe | 1891 | 5/29-6/25 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| John O'Brien | obrien009joh | 1891 | 4/30-7/23 | Portland | New England League | Portland, ME | |
| John O'Brien | obrien009joh | 1891 | 7/25- | 43 g. | Brooklyn | National League | Brooklyn, NY |
| John O'Brien | obrien019joh | 1891 | 5/9-5/25 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| John O'Brien | obrien020joh | 1891 | 5/4-5/14 | Salem | New England League | Salem, MA | |
| Pete O'Brien | obrien003pet | 1891 | Chicago Whitings | Chicago City League | Chicago, IL | ||
| Thomas O'Brien | obrien012tho | 1891 | 5/2-6/9 | Hartford | Connecticut State League | Hartford, CT | |
| Tom O'Brien | obrien001tom | 1891 | 4/30-8/1 | Worcester | New England League | Worcester, MA | |
| Tom O'Brien | obrien001tom | 1891 | 8/6-9/26 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| John O'Connell | oconne003joh | 1891 | 4/30-7/20 | Lynn | New England League | Lynn, MA | |
| John O'Connell | oconne003joh | 1891 | 8/22- | 8 g. | Baltimore | American Association | Baltimore, MD |
| Charles O'Connor | oconno002cha | 1891 | -10/25 | Chicago Garden Citys | Chicago City League | Chicago, IL | |
| Dan O'Connor | oconno001dan | 1891 | 5/9-7/18 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Jack O'Connor | oconno006joh | 1891 | 56 g. | Columbus | American Association | Columbus, OH | |
| Jack O'Connor | oconno006joh | 1891 | 7/17-9/13 | Denver Mountaineers | Western Association | Denver, CO | |
| Jack O'Connor | oconno002jac | 1891 | 4/30-7/20 | Lynn | New England League | Lynn, MA | |
| Mike O'Connor | oconno003mik | 1891 | 5/14-8/15 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Mike O'Connor | oconno003mik | 1891 | 9/1-9/9 | Olean | New York-Pennsylvania League | Olean, NY | |
| Roger O'Connor | oconno001rog | 1891 | 5/11-7/28 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Timothy O'Connor | oconno001tim | 1891 | 4/30-7/30 | Lynn | New England League | Lynn, MA | |
| Hank O'Day | oday--001han | 1891 | 4/20-8/21 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Harry O'Day | oday--001har | 1891 | 5/26-6/21 | Sacramento Senators | California League | Sacramento, CA | |
| Harry O'Day | oday--001har | 1891 | 7/23-7/26 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Harry O'Day | oday--001har | 1891 | 8/1-8/23 | Sacramento Senators | California League | Sacramento, CA | |
| Eddie O'Meara | omeara001tom | 1891 | -10/25 | Chicago Rivals | Chicago City League | Chicago, IL | |
| J. O'Meara | omeara000j-- | 1891 | -10/25 | Chicago Garden Citys | Chicago City League | Chicago, IL | |
| Ed O'Neil | oneil-001ed- | 1891 | 5/2-6/6 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Ed O'Neil | oneil-001ed- | 1891 | 10/23-11/22 | Oakland Colonels | California League | Oakland, CA | |
| Ed O'Neil | oneil-001ed- | 1891 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | ||
| Edward O'Neil | oneil-002edw | 1891 | 6/13 | Woonsocket | New England League | Woonsocket, RI | |
| William O'Neil | oneil-003wil | 1891 | 5/4-7/23 | Manchester Amskoegs | New England League | Manchester, NH | |
| William O'Neil | oneil-003wil | 1891 | 8/9 | Omaha Lambs | Western Association | Omaha, NE | |
| O'Neill | oneill002--- | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| O'Neill | oneill002--- | 1891 | Bellingham Bay | PugetSound | Bellingham Bay, WA | ||
| Dennis O'Neill | oneill001den | 1891 | Brattleboro MA | Independent | Brattleboro, MA | ||
| Fred O'Neill | oneill001fre | 1891 | 5/9-6/4+ | 20 g. | Detroit Wolverines | Northwestern League | Detroit, MI |
| Tip O'Neill | oneill001tip | 1891 | 127 g. | St. Louis Browns | American Association | St. Louis, MO | |
| Tip O'Neill | oneill001nor | 1891 | 3/22-11/22 | Oakland Colonels | California League | Oakland, CA | |
| Frank O'Rourke | orourk001fra | 1891 | 5/9-7/30 | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Jim O'Rourke | orourk003jam | 1891 | 136 g. | New York | National League | New York, NY | |
| Joseph O'Rourke | orourk004jos | 1891 | 5/14-8/15 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| Mike O'Rourke | orourk001mik | 1891 | 6/10-6/24 | Troy Trojans | Eastern Association | Troy, NY | |
| Mike O'Rourke | orourk001mik | 1891 | 7/11-7/27 | Albany Senators | Eastern Association | Albany, NY | |
| Tim O'Rourke | orourk003tim | 1891 | 4/17-6/16 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Tim O'Rourke | orourk003tim | 1891 | 6/18-8/17 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Tim O'Rourke | orourk003tim | 1891 | 34 g. | Columbus | American Association | Columbus, OH | |
| Tom O'Rourke | orourk001tom | 1891 | 5/5-5/12 | Denver Mountaineers | Western Association | Denver, CO | |
| Doc Oberlander | oberla001doc | 1891 | 5/20-7/11 | Olean | New York-Pennsylvania League | Olean, NY | |
| Kid Ogden | ogden-001lou | 1891 | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | ||
| Kid Ogden | ogden-001lou | 1891 | 5/9-7/30 | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Fred Orelup | orelup001fre | 1891 | 5/4-8/25 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Henry Ormsbee | ormsbe001hen | 1891 | 7/2?- | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Dave Orr | orr---002dav | 1891 | 9/28 | MLB Umpire | National League | , | |
| Al Orth | orth--001alb | 1891 | DePauw Univ. | College | , | ||
| Al Orth | orth--001alb | 1891 | Brazil | Independent | Brazil, IL | ||
| George Ortman | ortman001geo | 1891 | Chicago Franklins | Chicago City League | Chicago, IL | ||
| Otto Ortman | ortman001ott | 1891 | -10/25 | Chicago Franklins | Chicago City League | Chicago, IL | |
| Fred Osborne | osborn003fre | 1891 | 4/18-5/17 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Fred Osborne | osborn003fre | 1891 | 6/?-9/3 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Fred Osborne | osborn003fre | 1891 | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | ||
| Fred Osborne | osborn003fre | 1891 | -9/2 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Fred Osborne | osborn003fre | 1891 | 9/? | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | |
| Billy Otterson | otters001bil | 1891 | Altoona | Independent | Altoona, PA | ||
| Billy Otterson | otters001bil | 1891 | 2 g. | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| Ed Pabst | pabst-001ed- | 1891 | 5/16-7/29 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Ed Pabst | pabst-001ed- | 1891 | 32 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Ed Pabst | pabst-001ed- | 1891 | -9/ | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| George Page | page--003geo | 1891 | Galveston ES Levys | Independent | Galveston, TX | ||
| Parker | 1891 | Chicago Unions | Independent | Chicago, IL | |||
| Parker | parker074--- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| Harry Parker | parker004har | 1891 | 5/26 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Billy Parks | parks-002bil | 1891 | 4/30-8/1 | Worcester | New England League | Worcester, MA | |
| Billy Parks | parks-002bil | 1891 | 9/22 | Troy Trojans | Eastern Association | Troy, NY | |
| Jiggs Parrott | parrot001jig | 1891 | 4/15-10/4 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Tom Parrott | parrot002tho | 1891 | 4/17-9/14 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Tom Parrott | parrot002tho | 1891 | 10/17-11/22 | Sacramento Senators | California League | Sacramento, CA | |
| David Parsons | parson001dav | 1891 | Colby | College | , | ||
| David Parsons | parson001dav | 1891 | 6/15-7/25 | Lewiston | New England League | Lewiston, ME | |
| Bones Parvin | parvin001fra | 1891 | St. Joseph | St. Joseph, MO | |||
| John Patterson | patter007joh | 1891 | Freemont | Freemont, | |||
| Owen Patton | patton001owe | 1891 | 4/16-6/30 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Owen Patton | patton001owe | 1891 | 7/16-10/4 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Harley Payne | payne-005har | 1891 | 31 g. | Peoria Distillers | Northwestern League | Peoria, IL | |
| Harley Payne | payne-005har | 1891 | 7/28-7/30 | Kansas City Blues | Western Association | Kansas City, MO | |
| Harley Payne | payne-005har | 1891 | -9/21 | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Frank Pears | pears-002fra | 1891 | 4/18-9/13 | Kansas City Blues | Western Association | Kansas City, MO | |
| Chick Pedroes | pedro-001cha | 1891 | Marquette Undertakers | Upper Peninsula League | Marquette, WI | ||
| Chick Pedroes | pedro-001cha | 1891 | -10/25 | Chicago Franklins | Chicago City League | Chicago, IL | |
| William Peeples | peeple001wil | 1891 | 3/22-8/9 | Sacramento Senators | California League | Sacramento, CA | |
| William Peeples | peeple001wil | 1891 | 8/16-11/22 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Heinie Peitz | peitz-001hen | 1891 | Hillsboro IL | Independent | Hillsboro, IL | ||
| John Peltz | peltz-001joh | 1891 | 5/31-7/29 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| John Peltz | peltz-001joh | 1891 | -8/10 | Lebanon Cedars | Independent | Lebanon, PA | |
| John Peltz | peltz-001joh | 1891 | 8/11-9/26 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Harrison Peppers | pepper001har | 1891 | Webb City | Southwest League | Webb City, MO | ||
| Perkins | perkin021--- | 1891 | Chicago Whitings | Chicago City League | Chicago, IL | ||
| Sherman Perry | perry-001she | 1891 | WiSt | , | |||
| G. Peters | peters002g-- | 1891 | Chicago Brands | Chicago City League | Chicago, IL | ||
| Palmer Peterson | peters001pal | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| John Petrie | petrie001joh | 1891 | 4/25-7/11 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Pat Pettee | pettee001pat | 1891 | 4/8-4/14 | 2 g. | Louisville | American Association | Louisville, KY |
| Pat Pettee | pettee001pat | 1891 | 4/25-8/14 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Jack Pettiford | pettif002jac | 1891 | Carthage | Southwest League | Carthage, MO | ||
| Bob Pettit | pettit001bob | 1891 | 4/16-8/13 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| Bob Pettit | pettit001bob | 1891 | - 10/4 | 21 g. | Milwaukee | American Association | Milwaukee, WI |
| Charlie Petty | petty-002cha | 1891 | 5/9-7/15 | Dayton | Northwestern League | Dayton, OH | |
| Charlie Petty | petty-002cha | 1891 | 8/1-10/4 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Fred Pfeffer | pfeffe001fre | 1891 | 137 g. | Chicago | National League | Chicago, IL | |
| Phelan | phelan016--- | 1891 | Chicago Franklins | Chicago City League | Chicago, IL | ||
| Dick Phelan | phelan001dic | 1891 | 7/18-10/4 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Bill Phillips | philli005wil | 1891 | 7/31-8/15 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| Horace Phillips | philli001hor | 1891 | , | ||||
| Ira Phillips | philli001ira | 1891 | 3/28-9/13 | Oakland Colonels | California League | Oakland, CA | |
| Marr Phillips | philli003mar | 1891 | 4/25-9/21 | Troy Trojans | Eastern Association | Troy, NY | |
| Pickett | picket005--- | 1891 | Pittsburg | Southwest League | Pittsburg, KS | ||
| John Pickett | picket001joh | 1891 | 4/17-9/13 | Kansas City Blues | Western Association | Kansas City, MO | |
| Gracie Pierce | pierce001gra | 1891 | 7/2-7/6 | Umpire | EastA | , | |
| Pike | 1891 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |||
| Charles Pike | pike--002cha | 1891 | 4/30-9/2 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| George Pinkney | pinkne001geo | 1891 | 135 g. | Brooklyn | National League | Brooklyn, NY | |
| Pinney | pinney001--- | 1891 | +5/19- | Bristol-Plainville | Connecticut State League | Bristol, CT | |
| Herman Pitz | pitz--001her | 1891 | 5/14-9/9 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Walter Plock | plock-001wal | 1891 | 8/21-8/22 | 2 g. | Philadelphia | National League | Philadelphia, PA |
| James Plumb | 1891 | 4/30-6/28 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | ||
| Mark Polhemus | polhem001mar | 1891 | 4/15-9/26 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Arlie Pond | pond--001arl | 1891 | U. of Vermont | College | , | ||
| Lee Pond | pond--001lee | 1891 | Sheboygan | Independent | Sheboygan, WI | ||
| Tom Poorman | poorma001tom | 1891 | 4/16-6/23 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Tom Poorman | poorma001tom | 1891 | 7/12 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Tom Poorman | poorma001tom | 1891 | 7/25-7/30 | Omaha Lambs | Western Association | Omaha, NE | |
| Fred Popkay | popkay001fre | 1891 | 71 g. | Bay City | Northwestern League | Bay City, MI | |
| Fred Popkay | popkay001fre | 1891 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | ||
| Andy Porter | porter003and | 1891 | 88 g. | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI | |
| Fred Porter | porter001fre | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Fred Porter | porter001fre | 1891 | Salem OR | s-p | Salem, OR | ||
| Louis Porter | porter001lou | 1891 | 5/14-8/15 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| P. Possehl | posseh001--- | 1891 | -10/25 | Chicago Rivals | Chicago City League | Chicago, IL | |
| Vivian Potts | potts-001dan | 1891 | Norristown | Independent | Norristown, PA | ||
| Abner Powell | powell001abn | 1891 | 4/15-10/4 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Jim Powell | powell002jim | 1891 | 8/9 | Omaha Lambs | Western Association | Omaha, NE | |
| Tom Power | power-001tom | 1891 | 4/25-8/24 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Tom Power | power-001tom | 1891 | 9/6-11/22 | Oakland Colonels | California League | Oakland, CA | |
| Pat Powers | powers001pat | 1891 | 4/25-9/26 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Phil Powers | powers001phi | 1891 | -8/18 | 74 g. | MLB Umpire | National League | , |
| Thomas Powers | powers003tho | 1891 | Rochester Hop Bitters | Eastern Association | Rochester, NY | ||
| William Prescott | presco001wil | 1891 | 78 g. | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI | |
| Walt Preston | presto002wal | 1891 | Aspen Sandens | Independent | Aspen, CO | ||
| George Pritchard | 1891 | Aberdeen Nonpareil | Independent | Aberdeen, SD | |||
| George Proeser | proese001geo | 1891 | 40 g. | Dayton | Northwestern League | Dayton, OH | |
| James Purvis | purvis002jam | 1891 | 43 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Harry Putnam | putnam001har | 1891 | 7/27-7/31 | Lynn | New England League | Lynn, MA | |
| William Putnam | putnam002wil | 1891 | 7/1-7/15 | Lewiston | New England League | Lewiston, ME | |
| Harry Pyle | pyle--001sha | 1891 | +8/9+ | Reading Actives | Independent | Reading, PA | |
| Bill Quarles | quarle001bil | 1891 | 5/21- | 3 g. | Washington | American Association | Washington, DC |
| James Quarmby | quarmb001jam | 1891 | 5/4-7/20 | Lynn | New England League | Lynn, MA | |
| Joe Quest | quest-001joe | 1891 | 4/30-7/22 | Umpire | Il-Ia | , | |
| Joe Quest | quest-001joe | 1891 | 7/27-8/17 | Umpire | WestA | , | |
| Joe Quest | quest-001joe | 1891 | -9/21 | Umpire | WiSt | , | |
| J. Quigley | quigle002j-- | 1891 | -10/25 | Chicago Brands | Chicago City League | Chicago, IL | |
| Frank Quinlan | quinla001fra | 1891 | 10/05 | 2 g. | Boston | American Association | Boston, MA |
| Joe Quinn | quinn-003jos | 1891 | 124 g. | Boston | National League | Boston, MA | |
| Mike Quinn | quinn-001mik | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Tom Quinn | quinn-001tom | 1891 | 4/25-8/25 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Maurice Quirk | quirk-001mau | 1891 | 5/14-6/23 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| M. Quitsow | quitzo001--- | 1891 | 5/17-Â | Chicago Brands | Chicago City League | Chicago, IL | |
| William Quivey | quivey000wil | 1891 | +7/19+ | Philipsburg MT | Independent | Phillipsburg, MT | |
| Old Hoss Radbourn | radbou001old | 1891 | 29 g. | Cincinnati | National League | Cincinnati, OH | |
| John Rademacher | rodema002joh | 1891 | Carthage | Southwest League | Carthage, MO | ||
| Paul Radford | radfor002pau | 1891 | 133 g. | Boston | American Association | Boston, MA | |
| Bill Raffert | raffer001wil | 1891 | 5/9-7/30 | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Jack Rafferty | raffer001joh | 1891 | Houghton | Upper Peninsula League | Houghton, MI | ||
| John Rainey | rainey001joh | 1891 | 5/9-6/7 | Detroit Wolverines | Northwestern League | Detroit, MI | |
| John Rainey | rainey001joh | 1891 | 6/16-8/1 | Manchester Amskoegs | New England League | Manchester, NH | |
| John Rainey | rainey001joh | 1891 | 8/15-9/9 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Robert Rainey | rainey001rob | 1891 | Bedford | Independent | Bedford, VA | ||
| Hank Ramsey | ramsey001hen | 1891 | Paterson NJ | Semi-pro | Paterson, NJ | ||
| Joseph Ramsey | 1891 | 6/27-7/7 | Umpire | EastA | , | ||
| Toad Ramsey | ramsey001toa | 1891 | 4/18 | Denver Mountaineers | Western Association | Denver, CO | |
| Dud Randall | randal001dud | 1891 | 5/19-5/22 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Dud Randall | randal001dud | 1891 | 54 g. | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI | |
| Jim Randall | randal004jam | 1891 | 4/25-9/26 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| John Rappold | rappol001jos | 1891 | 4/7-5/23 | Bellingham Bay | PugetSound | Bellingham Bay, WA | |
| John Rappold | rappol001jos | 1891 | Seattle Maroons | PugetSound | Seattle, WA | ||
| John Rappold | rappol001jos | 1891 | Port Townsend | Independent | Port Townsend, WA | ||
| John Rappold | rappol001jos | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Arthur Rathburn | rathbu001art | 1891 | 4/15-4/19 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Arthur Rathburn | rathbu001art | 1891 | 5/9-6/8 | Bay City | Northwestern League | Bay City, MI | |
| Ray | ray---023--- | 1891 | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | ||
| Irv Ray | ray---001irv | 1891 | -9/2 | 103 g. | Baltimore | American Association | Baltimore, MD |
| Harry Raymond | raymon002har | 1891 | 4/16-6/14 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Harry Raymond | raymon002har | 1891 | 14 g. | Louisville | American Association | Louisville, KY | |
| Harry Raymond | raymon002har | 1891 | 7/4-8/21 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Harry Raymond | raymon002har | 1891 | 8/27-9/13 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Hugh Reddy | 1891 | 5/2-6/9 | Norwich | Connecticut State League | Norwich, CT | ||
| Reed | 1891 | 8/1 | Lewiston | New England League | Lewiston, ME | ||
| Nick Reeder | reeder001nic | 1891 | 4/11 | 1 g. | Louisville | American Association | Louisville, KY |
| Nick Reeder | reeder001nic | 1891 | 33 g. | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Nick Reeder | reeder001nic | 1891 | 66 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Regan | regan-002--- | 1891 | +5/9- | Hartford | Connecticut State League | Hartford, CT | |
| Regan | regan-003--- | 1891 | +5/13- | Southington | Connecticut State League | Southington, CT | |
| John Reidy | reidy-002joh | 1891 | no g. | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Charlie Reilly | reilly003cha | 1891 | 114 g. | Pittsburgh | National League | Pittsburgh, PA | |
| James Reilly | 1891 | Rahways | Independent | , | |||
| Jim Reilly | reilly001joe | 1891 | Rahways | Independent | , | ||
| John Reilly | reilly004joh | 1891 | 135 g. | Cincinnati | National League | Cincinnati, OH | |
| Josh Reilly | reilly002wil | 1891 | Santa Rosa CA | Independent | Santa Rosa, CA | ||
| Josh Reilly | reilly002wil | 1891 | 10/5 | Oakland Colonels | California League | Oakland, CA | |
| Henry Reitz | reitz-001hen | 1891 | 3/22-3/27 | Oakland Colonels | California League | Oakland, CA | |
| Henry Reitz | reitz-001hen | 1891 | 4/25-6/27Â | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Henry Reitz | reitz-001hen | 1891 | 7/5-9/? | Oakland Colonels | California League | Oakland, CA | |
| Henry Reitz | reitz-001hen | 1891 | 9/20-11/22 | Sacramento Senators | California League | Sacramento, CA | |
| Jack Remsen | remsen001jac | 1891 | 4/30-8/26 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| James Renwick | renwic001jam | 1891 | Calumet Red Jackets | Upper Peninsula League | Calumet, MI | ||
| George Rettger | rettge002geo | 1891 | 31 g. | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| George Rettger | rettge002geo | 1891 | 8/6-8/9 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| George Rettger | rettge002geo | 1891 | 8/13 - | 15 g. | St. Louis Browns | American Association | St. Louis, MO |
| Charlie Reynolds | reynol006cha | 1891 | 4/18-6/27 | Denver Mountaineers | Western Association | Denver, CO | |
| Charlie Reynolds | reynol006cha | 1891 | 8/15-10/12 | Sacramento Senators | California League | Sacramento, CA | |
| Ernest Reynolds | reynol001ern | 1891 | 5/1-7/20 | Lynn | New England League | Lynn, MA | |
| Frank Rheims | rheims001fra | 1891 | Chicago Whitings | Chicago City League | Chicago, IL | ||
| Billy Rhines | rhines001wil | 1891 | 48 g. | Cincinnati | National League | Cincinnati, OH | |
| George Rhue | rhue--001geo | 1891 | 5/9-6/8 | Bay City | Northwestern League | Bay City, MI | |
| George Rhue | rhue--001geo | 1891 | 6/14-6/23 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| George Rhue | rhue--001geo | 1891 | 6/26-6/27 | Dayton | Northwestern League | Dayton, OH | |
| George Rhue | rhue--001geo | 1891 | 6/28-6/30 | Umpire | NW | , | |
| George Rhue | rhue--001geo | 1891 | 7/18-7/29 | Umpire | NW | , | |
| Alfred Richards | richar002alf | 1891 | 6/10-6/13 | Woonsocket | New England League | Woonsocket, RI | |
| Danny Richardson | richar002dan | 1891 | 123 g. | New York | National League | New York, NY | |
| Hardy Richardson | richar001har | 1891 | 74 g. | Boston | American Association | Boston, MA | |
| John Ricks | ricks-001joh | 1891 | 9/21 - | 5 g. | St. Louis Browns | American Association | St. Louis, MO |
| F. Riedenbach | 1891 | Port Townsend | PugetSound | Port Townsend, WA | |||
| John Riedenbach | 1891 | Port Townsend | PugetSound | Port Townsend, WA | |||
| Robert Rigby | rigby-001rob | 1891 | 5/11-5/29 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Josh? Riley | 1891 | 5/9-9/14 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| John Roach | roach-003joh | 1891 | 4/18-7/12 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| John Roach | roach-003joh | 1891 | 8/4-9/13 | Kansas City Blues | Western Association | Kansas City, MO | |
| Fred Roat | roat--001fre | 1891 | 4/30-6/25 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Fred Roat | roat--001fre | 1891 | 6/27-8/21 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Vince Robbins | robbin003--- | 1891 | 7/23 | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Roberts | robert004--- | 1891 | 5/14-5/16 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Carroll Roberts | robert002car | 1891 | Ishpeming | Upper Peninsula League | Ishpeming, MI | ||
| Fred Roberts | robert004fre | 1891 | 4/25-6/27 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Fred Roberts | robert004fre | 1891 | 7/10-7/26 | Oakland Colonels | California League | Oakland, CA | |
| Fred Roberts | robert004fre | 1891 | 8/20-11/14 | Sacramento Senators | California League | Sacramento, CA | |
| Thomas Robinson | 1891 | 3/22-11/22 | Oakland Colonels | California League | Oakland, CA | ||
| Wilbert Robinson | robins001wil | 1891 | 93 g. | Baltimore | American Association | Baltimore, MD | |
| William Robinson | robins001yan | 1891 | 97 g. | Cincinnati | American Association | Cincinnati, OH | |
| William Robinson | robins001yan | 1891 | 1 g. | St. Louis Browns | American Association | St. Louis, MO | |
| Daniel Roche | roche-002dan | 1891 | 4/27-8/25 | Albany Senators | Eastern Association | Albany, NY | |
| J. F. Roche | 1891 | Lincoln Rustlers | Western Association | Lincoln, NE | |||
| Billy Rockwell | rockwe001elm | 1891 | Secretary/Trea | PacNW | , | ||
| E. Rogers | rogers004e-- | 1891 | 37 g. | Appleton Papermakers | Wisconsin State League | Appleton, WI | |
| Emmett Rogers | rogers002emm | 1891 | 4/20-7/14 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Emmett Rogers | rogers002emm | 1891 | 7/29-8/19 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Emmett Rogers | rogers002emm | 1891 | -9/22 | 21 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI |
| Jim Rogers | rogers001jim | 1891 | +5/22 | Norwich | Connecticut State League | Norwich, CT | |
| Jim Rogers | rogers001jim | 1891 | 6/3-7/16 | Lynn | New England League | Lynn, MA | |
| Pat Rollins | rollin001hen | 1891 | Harrisburg | Harrisburg, PA | |||
| Rooks | rooks-001--- | 1891 | Chicago Garden Citys | Chicago City League | Chicago, IL | ||
| George Rooks | rooks-001geo | 1891 | 5/12-5/16 | 5 g. | Boston | National League | Boston, MA |
| George Rooks | rooks-001geo | 1891 | 24 g. | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Rose | 1891 | Southington | Connecticut State League | Southington, CT | |||
| Bobby Rothermel | rother001bob | 1891 | +7/4+ | Lafayette Col. | College | , | |
| Bobby Rothermel | rother001bob | 1891 | no g. | Pittsburgh | National League | Pittsburgh, PA | |
| Bobby Rothermel | rother001bob | 1891 | Easton PA | Independent | Easton, PA | ||
| John Roushkolb | roushk001joh | 1891 | 5/26-6/ | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Elmer Roussey | rousse002elm | 1891 | 29 g. | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | |
| Elmer Roussey | rousse002elm | 1891 | 7/13-9/9 | Olean | New York-Pennsylvania League | Olean, NY | |
| Phil Routcliffe | routcl001phi | 1891 | 4/15-10/4 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Rev. Rowan | 1891 | E. Stroudsburg | Independent | East Stroudsburg, | |||
| Dave Rowe | rowe--001dav | 1891 | 4/18-8/16 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Jack Rowe | rowe--001jac | 1891 | 4/16-8/21 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Jack Rowe | rowe--002jac | 1891 | 5/14-5/30 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| William Rowe | rowe--003wil | 1891 | Woonsocket | New England League | Woonsocket, RI | ||
| William Rowe | rowe--003wil | 1891 | 6/10-7/ | Woonsocket | New England League | Woonsocket, RI | |
| Roxbury | roxbur000--- | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| Frank Rudderham | rudder001fra | 1891 | 7/9-7/18 | Portland | New England League | Portland, ME | |
| John Rudderham | rudder001joh | 1891 | 6/10-7/25 | Lewiston | New England League | Lewiston, ME | |
| John Rudderham | rudder001joh | 1891 | 8/8-8/11 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| William Rudolph | rudolp001wil | 1891 | 5/13-5/14 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Amos Rusie | rusie-001amo | 1891 | 62 g. | New York | National League | New York, NY | |
| Russell | russel035--- | 1891 | +6/5- | Meriden | Connecticut State League | Meriden, CT | |
| J. F. Russell | 1891 | Olneyville | RI | Olneyville, | |||
| J. F. Russell | 1891 | Woonsocket | New England League | Woonsocket, RI | |||
| Charles Rutter | rutter001cha | 1891 | Ishpeming | Upper Peninsula League | Ishpeming, MI | ||
| Ryan | ryan--054--- | 1891 | 7/14 | Lewiston | New England League | Lewiston, ME | |
| Ryan | ryan--057--- | 1891 | Calumet Red Jackets | Upper Peninsula League | Calumet, MI | ||
| Cyclone Ryan | ryan--001cyc | 1891 | 5/8 | 1 g. | Boston | National League | Boston, MA |
| Cyclone Ryan | ryan--001cyc | 1891 | 6/9-7/19 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Jack Ryan | ryan--004joh | 1891 | 75 g. | Louisville | American Association | Louisville, KY | |
| Jimmy Ryan | ryan--003jam | 1891 | 118 g. | Chicago | National League | Chicago, IL | |
| Mike Ryan | ryan--001mik | 1891 | Fort Worth | Fort Worth, TX | |||
| Dummy Ryn | ryn---001joh | 1891 | 4/16-7/16 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Harry Sage | sage--001har | 1891 | 3/ | Ocala FL | Independent | Ocala, FL | |
| Harry Sage | sage--001har | 1891 | 4/30-6/25 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Harry Sage | sage--001har | 1891 | 8/3-8/25 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Harry Sage | sage--001har | 1891 | 8/27-9/26 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Ed Sales | sales-001ed- | 1891 | 4/25-8/14 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Ed Sales | sales-001ed- | 1891 | 8/20-8/25 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Ed Sales | sales-001ed- | 1891 | 9/2-9/26 | Troy Trojans | Eastern Association | Troy, NY | |
| Salliard | 1891 | no g. | Sioux City Corn Huskers | Western Association | Sioux City, IA | ||
| Ben Sanders | sander002ben | 1891 | 40 g. | Philadelphia | American Association | Philadelphia, PA | |
| George Sanford | sanfor003geo | 1891 | 4/30-7/4 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Stuart Sanford | sanfor001stu | 1891-93 | WashDC-YMCA | Amat | Washington, DC | ||
| Edward Santry | santry001edw | 1891 | Chicago West Ends | Chicago City League | Chicago, IL | ||
| Al Sauter | sauter001al- | 1891 | Phil.-Davis | Independent | Philadelphia, PA | ||
| E. Sauter | sauter000e-- | 1891 | 5/17-10/25 | Chicago Brands | Chicago City League | Chicago, IL | |
| George Sayer | sayer-001geo | 1891 | -10/25 | Chicago West Ends | Chicago City League | Chicago, IL | |
| Phil Saylor | saylor001phi | 1891 | 7/11 | 1 g. | Philadelphia | National League | Philadelphia, PA |
| Scally | scally001--- | 1891 | Mt. Pleasant | Independent | Mt. Pleasant, NH | ||
| Scally | scally001--- | 1891 | +5/30- | West Haven | Connecticut State League | West Haven, CT | |
| Mort Scanlan | scanla001mor | 1891 | -10/25 | Chicago Whitings | Chicago City League | Chicago, IL | |
| Scanlon | scanlo009--- | 1891 | Calumet Red Jackets | Upper Peninsula League | Calumet, MI | ||
| Miah Scannell | scanne001jer | 1891 | 5/2- | Salem | New England League | Salem, MA | |
| Miah Scannell | scanne001jer | 1891 | -6/25 | Lewiston | New England League | Lewiston, ME | |
| Joseph Schachern | schach003jos | 1891 | no g. | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Otto Schaffer | schaff000ott | 1891 | -10/25 | Chicago West Ends | Chicago City League | Chicago, IL | |
| Bob Schaub | schaub001rob | 1891 | 5/26-9/ | 90g. | Appleton Papermakers | Wisconsin State League | Appleton, WI |
| Fred Schaub | schaub001fre | 1891 | 5/26-9/22 | Appleton Papermakers | Wisconsin State League | Appleton, WI | |
| Ted Scheffler | scheff001ted | 1891 | 4/25-9/26 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Frank Scheibeck | scheib001fra | 1891 | 4/16-9/13 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| William Schellerman | schell002wil | 1891 | 5/21 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| William Schellerman | schell002wil | 1891 | 9/24-9/26 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Al Schellhase | schell001al- | 1891 | 66 g. | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| Al Schellhase | schell001al- | 1891 | 7/9-9/30 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Al Schellhase | schell001al- | 1891 | -10/4 | 6 g. | Louisville | American Association | Louisville, KY |
| Gus Schmelz | schmel001gus | 1891 | Columbus | American Association | Columbus, OH | ||
| Schmidt | schmid002--- | 1891 | 15 g. | Appleton Papermakers | Wisconsin State League | Appleton, WI | |
| Crazy Schmit | schmit001fre | 1891 | 4/20-5/12 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Crazy Schmit | schmit001fre | 1891 | 5/18-5/29 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Crazy Schmit | schmit001fre | 1891 | 6/12-6/15 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Crazy Schmit | schmit001fre | 1891 | +6/25-7/12 | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| Crazy Schmit | schmit001fre | 1891 | -9/ | 15 g. | Appleton Papermakers | Wisconsin State League | Appleton, WI |
| Schmitt | schmit006--- | 1891 | Chicago Franklins | Chicago City League | Chicago, IL | ||
| Jake Schnur | schnur000jak | 1891 | -10/25 | Chicago Whitings | Chicago City League | Chicago, IL | |
| Nic Schnur | schnur000n-- | 1891 | -10/25 | Chicago Whitings | Chicago City League | Chicago, IL | |
| Jumbo Schoeneck | schoen001jum | 1891 | 4/15-10/4 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Otto Schomberg | schomb001ott | 1891 | 5/17 | Umpire | WestA | , | |
| Pop Schriver | schriv001wil | 1891 | 4/16-8/13 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| Pop Schriver | schriv001wil | 1891 | 27 g. | Chicago | National League | Chicago, IL | |
| Bert Schultz | schult002ber | 1891 | TH-Crescents | Independent | , | ||
| Bert Schultz | schult002ber | 1891 | 5/9-5/11 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| John Schultz | schult007joh | 1891 | 5/6-6/11 | 6 g. | Philadelphia | National League | Philadelphia, PA |
| John Schultz | schult007joh | 1891 | 7/6-7/25 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| John Schulze | schulz001joh | 1891 | 8/7 | 1 g. | St. Louis Browns | American Association | St. Louis, MO |
| Scott | scott-043--- | 1891 | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | ||
| Scott | scott-062--- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| Searle | searle001--- | 1891 | 7/17 | Salem | New England League | Salem, MA | |
| Emmett Seery | seery-001emm | 1891 | 97 g. | Cincinnati | American Association | Cincinnati, OH | |
| William Selden | seldon001wil | 1891 | Cuban Giants | Independent | Cuban, | ||
| William Selden | seldon001wil | 1891 | New York Gorhams | Independent | New York, NY | ||
| Frank Selee | selee-001fra | 1891 | Boston | National League | Boston, MA | ||
| Charles Selna | selna-001cha | 1891 | 6/13 | Denver Mountaineers | Western Association | Denver, CO | |
| Billy Serad | serad-001bil | 1891 | 5/16-6/28 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Ed Seward | seward001ed- | 1891 | 7 g. | Cleveland | National League | Cleveland, OH | |
| Frank Sexton | sexton001fra | 1891 | Wauskuck | RI | Wauskuck, | ||
| Frank Sexton | sexton001fra | 1891 | 7/6-7/17 | Woonsocket | New England League | Woonsocket, RI | |
| Socks Seybold | seybol001ral | 1891 | Jeannett-Grays | Independent | Jeannette, PA | ||
| Charlie Shaffer | shaffe001cha | 1891 | WillaimsportPA | Independent | Williamsport, PA | ||
| John Shaffer | shaffe001joh | 1891 | Williamsport Demorest | Independent | Williamsport, PA | ||
| James Shamus | shamus001jam | 1891 | 6/30-7/21 | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Tim Shanahan | shanah001tim | 1891 | 8/14 | Sacramento Senators | California League | Sacramento, CA | |
| Dan Shannon | shanno004dan | 1891 | 4/16-7/12 | Omaha Lambs | Western Association | Omaha, NE | |
| Dan Shannon | shanno004dan | 1891 | -9/16 | 19 g. | Washington | American Association | Washington, DC |
| Joseph Shannon | shanno003jos | 1891 | U.ofPennsylvania | College | , | ||
| George Sharp | sharp-001geo | 1891 | 5/14-9/7 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| George Sharp | sharp-002geo | 1891 | 5/7-5/14 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| George Sharp | sharp-002geo | 1891 | 6/19-11/22 | San Jose Dukes | California League | San Jose, CA | |
| Peck Sharp | sharp-001jim | 1891 | 3/22-11/22 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Jack Sharrott | sharro001jac | 1891 | 10 g. | New York | National League | New York, NY | |
| Bill Sharsig | sharsi001bil | 1891 | Philadelphia | American Association | Philadelphia, PA | ||
| Sam Shaw | shaw--002sam | 1891 | 4 g. | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Sam Shaw | shaw--002sam | 1891 | 6/2-6/15 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Shea | shea--017--- | 1891 | 7/21-7/22 | Lowell Lowells | New England League | Lowell, MA | |
| Shea | shea--010--- | 1891 | 7/29 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Joseph Shea | shea--001jos | 1891 | 4/15-10/4 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Joseph Shea | shea--001jos | 1891 | 10/15-11/22 | Oakland Colonels | California League | Oakland, CA | |
| Mike Shea | shea--001mik | 1891 | New Orleans LA | Independent | New Orleans, LA | ||
| Patr. Shea | shea--002pat | 1891 | 4/27-8/10 | Troy Trojans | Eastern Association | Troy, NY | |
| John Shearon | shearo002joh | 1891 | 5/15-7/27 | Bradford | New York-Pennsylvania League | Bradford, PA | |
| John Shearon | shearo002joh | 1891 | 7/28- | 30 g. | Cleveland | National League | Cleveland, OH |
| Owen Sheehan | sheeha001owe | 1891 | 23 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Timothy Sheehan | sheeha001bif | 1891 | 5/2-6/9 | Hartford | Connecticut State League | Hartford, CT | |
| Sheets | sheets002--- | 1891 | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | ||
| Joe Sheets | sheets001joe | 1891 | 5/7 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Joe Sheets | sheets001joe | 1891 | 6/17 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Alfred Sheppard/erd | sheppa001alf | 1891 | 4 g. | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Lonnie Sherbocker | sherbo001lon | 1891 | 4/19-Â | KC-Stars | Independent | Kansas City, MO | |
| Lonnie Sherbocker | sherbo001lon | 1891 | 6/-Â | Webb City | Southwest League | Webb City, MO | |
| Lonnie Sherbocker | sherbo001lon | 1891 | +9/6+ | Mets | , | ||
| Jack Sheridan | sherid001jac | 1891 | Umpire | Calif | , | ||
| Charles Sherwood | sherwo002jam | 1891 | Memphis | Memphis, TN | |||
| Daniel Shields | shield002dan | 1891 | 5/14-9/9 | Erie | New York-Pennsylvania League | Erie, PA | |
| Shilling | 1891 | Beatrice Indians | NBSt | Beatrice, NE | |||
| Billy Shindle | shindl001wil | 1891 | 103 g. | Philadelphia | National League | Philadelphia, PA | |
| Michael Shine | shine-001mic | 1891 | 5/2-8/1 | Portland | New England League | Portland, ME | |
| Shinehouse | shineh001--- | 1891 | Pottstown PA | Independent | Pottstown, PA | ||
| Charles Shinehouse | 1891 | Pottstown PA | Independent | Pottstown, PA | |||
| Tim Shinnick | shinni002tim | 1891 | -10/4 | 126 g. | Louisville | American Association | Louisville, KY |
| George Shoch | shoch-001geo | 1891 | 4/16-8/13 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| George Shoch | shoch-001geo | 1891 | -10/2 | 34 g. | Milwaukee | American Association | Milwaukee, WI |
| Lev Shreve | shreve001lev | 1891 | 5/13-7/22 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Frank Shugart | shugar001fra | 1891 | 4/16-7/8 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Frank Shugart | shugar001fra | 1891 | 75 g. | Pittsburgh | National League | Pittsburgh, PA | |
| Rush Shumway | shumwa001rus | 1891 | 5/26-9/ | 88 g. | Appleton Papermakers | Wisconsin State League | Appleton, WI |
| Henry Siebel | siebel001hen | 1891 | 4/17-5/8 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Henry Siebel | siebel001hen | 1891 | 5/17 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Fred Siefke | siefke001fre | 1891 | 6/20-7/20 | Lynn | New England League | Lynn, MA | |
| Hank Simon | simon-001hen | 1891 | 4/25-8/25 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Henry Sinclair | sincla002--- | 1891 | Galveston | Independent | Galveston, TX | ||
| Arthur Sippi | sippi-001art | 1891 | 4/15-10/4 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| John Slagle | slagle002joh | 1891 | 4/30 | 1 g. | Cincinnati | American Association | Cincinnati, OH |
| John Slagle | slagle002joh | 1891 | 5/11-5/30 | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| John Slagle | slagle002joh | 1891 | 29 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI | |
| Ed Slater | slater001hen | 1891 | 4/30-8/1 | Portland | New England League | Portland, ME | |
| Mike Slattery | slatte001mik | 1891 | 41 g. | Cincinnati | National League | Cincinnati, OH | |
| Mike Slattery | slatte001mik | 1891 | 15 g. | Washington | American Association | Washington, DC | |
| J. Sledge | 1891 | no g. | Denver Mountaineers | Western Association | Denver, CO | ||
| Will Smalley | smalle001wil | 1891 | -4/30 | 11 g. | Washington | American Association | Washington, DC |
| Will Smalley | smalle001wil | 1891 | 5/4-5/15 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Bill Smink | smink-001wil | 1891 | McKeesport PA | Independent | McKeesport, PA | ||
| Bill Smink | smink-001wil | 1891 | +5/30+ | Brigeville | AllegCo | Brigeville, PA | |
| Bill Smink | smink-001wil | 1891 | 7/4 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| Smith | smith-058--- | 1891 | +5/22- | Norwich | Connecticut State League | Norwich, CT | |
| Smith | smith-113--- | 1891 | +5/13- | Southington | Connecticut State League | Southington, CT | |
| Smith | smith-250--- | 1891 | 8/17 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Smith | smith-021--- | 1891 | 8/19 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Smith | 1891 | Tope.-CapitalCity | Independent | Topeka, KS | |||
| Smith | smith-344--- | 1891 | Chicago Rivals | Chicago City League | Chicago, IL | ||
| Big Bill Smith | smith-000big | 1891 | Chicago Unions | Independent | Chicago, IL | ||
| Billy Smith | smith-244--- | 1891 | Knoxville | Independent | Knoxville, TN | ||
| Billy Smith | smith-011wil | 1891 | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | ||
| Charles Smith | smith-040cha | 1891 | 7/9 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Elmer Smith | smith-004elm | 1891 | 4/17-9/13 | Kansas City Blues | Western Association | Kansas City, MO | |
| Fred Smith | smith-016fre | 1891 | 4/17-7/26 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| Germany Smith | smith-013geo | 1891 | 138 g. | Cincinnati | National League | Cincinnati, OH | |
| Hank Smith | smith-002han | 1891 | 6/2 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Hank Smith | smith-002han | 1891 | 6/23-8/18+ | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Hank Smith | smith-002han | 1891 | 6/23-8/18+ | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Harry Smith | smith-024har | 1891 | New Haven Nutmegs | Eastern Association | New Haven, CT | ||
| Harry Smith | smith-052joh | 1891 | Hartford | Connecticut State League | Hartford, CT | ||
| Harry Smith | smith-028har | 1891 | 4/30-5/5 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Harry Smith | 1891 | Northampton | Independent | Northampton, MA | |||
| Harvey Smith | smith-020har | 1891-94 | Bucknell | College | , | ||
| Henry Smith | smith-005hen | 1891 | Northampton MA | Independent | , | ||
| John Smith | smith-052joh | 1891 | 5/2-6/9 | Hartford | Connecticut State League | Hartford, CT | |
| John Smith | smith-053joh | 1891 | +4/ | Loui.-Deppens | Independent | Louisville, KY | |
| John Smith | smith-053joh | 1891 | 5/11-6/3 | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| Jud Smith | smith-001jud | 1891 | Ohio State U. | College | , | ||
| Jud Smith | smith-001jud | 1891 | 16 g. | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | |
| Lee Smith | smith-002lee | 1891 | Guilford College | College | , | ||
| Leo Smith | smith-007leo | 1891 | 4/25-9/26 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| Nicholas Smith | smith-002nic | 1891 | 5/22-11/22 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Ollie Smith | smith-002oll | 1891 | Aspen Sandens | Independent | Aspen, CO | ||
| Pacer Smith | smith-041cha | 1891 | Shreveport IL | Independent | Shreveport, IL | ||
| Phenomenal Smith | smith-013joh | 1891 | 3 g. | Philadelphia | National League | Philadelphia, PA | |
| Phenomenal Smith | smith-013joh | 1891 | 7/9-8/11 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| Pop Smith | smith-001pop | 1891 | -6/9 | 27 g. | Washington | American Association | Washington, DC |
| Pop Smith | smith-001pop | 1891 | 8/2-9/7 | Omaha Lambs | Western Association | Omaha, NE | |
| Richard Smith | 1891 | WaSt | , | ||||
| Richard Smith | 1891 | 5/14-7/17 | Helena | MontSt | Helena, MT | ||
| Skyrocket Smith | smith-001sky | 1891 | Seattle | PugetSound | Seattle, WA | ||
| Skyrocket Smith | smith-001sky | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Tom Smith | smith-006tom | 1891-92 | Fordham College | College | , | ||
| John Sneed | sneed-002joh | 1891 | 99 g. | Columbus | American Association | Columbus, OH | |
| James Sneeden | sneede001jam | 1891 | 5/16-9/8 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Benjamin Snyder | snyder003ben | 1891 | 4/15-6/25 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Benjamin Snyder | snyder003ben | 1891 | 7/10-9/26 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Pop Snyder | snyder001pop | 1891 | 8 g. | Washington | American Association | Washington, DC | |
| Enoch Somers | 1891 | Holt MI | Independent | Holt, MI | |||
| Joe Sommer | sommer001joe | 1891 | 4/25-8/14 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Andy Sommers | sommer001pet | 1891 | 66 g. | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| Andy Sommers | sommer001pet | 1891 | 8/6-8/19 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Andy Sommers | sommer001pet | 1891 | Oconto Log Drivers | Wisconsin State League | Oconto, WI | ||
| Andy Sommers | sommer001pet | 1891 | 18 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Pete Sommers | sommer001jos | 1891 | 5/-6/7+ | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Pete Sommers | sommer001jos | 1891 | 6/- | Oakland Colonels | California League | Oakland, CA | |
| Pete Sommers | sommer001jos | 1891 | 10- | Sacramento Senators | California League | Sacramento, CA | |
| Pete Sommers | sommer002pet | 1891 | 5/1-9/2 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Soper | soper-001--- | 1891 | Hartford | Connecticut State League | Hartford, CT | ||
| Bill Sowders | sowder001bil | 1891 | 5/9-7/20 | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Bill Sowders | sowder001bil | 1891 | 8/10-8/14 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Dave Sowders | sowder001dav | 1891 | 5/26- | 36 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI |
| John Sowders | sowder001joh | 1891 | 4/17-9/5 | Kansas City Blues | Western Association | Kansas City, MO | |
| Tim Spalding | 1891 | 7/4- | Hoosic Falls | Independent | Hoosic Falls, NY | ||
| Spaulding | spauld003--- | 1891 | Chicago Brands | Chicago City League | Chicago, IL | ||
| James Spear | spear-001jam | 1891 | 8/5-8/6 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Chick Speer | speer-003geo | 1891 | 3/22-9/3 | San Jose Dukes | California League | San Jose, CA | |
| Chick Speer | speer-003geo | 1891 | 9/6-11/22 | Oakland Colonels | California League | Oakland, CA | |
| Wirt Spencer | spence001wir | 1891 | Denison HS | HighSchool | , | ||
| O. Spielman | 1891 | Chicago Franklins | Chicago City League | Chicago, IL | |||
| Harry Spies | spies-001hen | 1891 | 3/28-11/1 | Sacramento Senators | California League | Sacramento, CA | |
| Frank Spill | spill-001fra | 1891 | 5/9-7/16 | Peoria Distillers | Northwestern League | Peoria, IL | |
| Frank Spill | spill-001fra | 1891 | 7/19-7/29 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Frank Spill | spill-001fra | 1891 | 25 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| George Spore | spore-001geo | 1891 | 19 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Charlie Sprague | spragu001cha | 1891 | 5/22-5/30 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Charlie Sprague | spragu001cha | 1891 | 6/11-6/17 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Charlie Sprague | spragu001cha | 1891 | 8/13-9/13 | Denver Mountaineers | Western Association | Denver, CO | |
| Oliver Sprogell | sproge001oli | 1891 | 5/4-5/28 | Albany Senators | Eastern Association | Albany, NY | |
| Oliver Sprogell | sproge001oli | 1891 | Troy Trojans | Eastern Association | Troy, NY | ||
| Ed Spurney | spurne001ed- | 1891 | 5/9-6/2 | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| Ed Spurney | spurne001ed- | 1891 | 6/26- | 3 g. | Pittsburgh | National League | Pittsburgh, PA |
| Ed Spurney | spurne001ed- | 1891 | 7/6-9/2 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| T.J. Stack | stack-000tj- | 1891 | NY-Pa | , | |||
| James Stafford | staffo001gen | 1891 | 4/18-8/4 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| James Stafford | staffo001--- | 1891 | 16 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| John Stafford | staffo001joh | 1891 | Holy Cross Col. | College | , | ||
| John Stafford | staffo001joh | 1891 | 6/13-7/31 | Woonsocket | New England League | Woonsocket, RI | |
| Amos Stagg | 1891 | Titusville PA | Independent | Titusville, PA | |||
| John Staib | staib-001joh | 1891 | 6/1-8/11 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| John Staib | staib-001joh | 1891 | 8/19-9/26 | Troy Trojans | Eastern Association | Troy, NY | |
| Harry Staley | staley001har | 1891 | 9 g. | Pittsburgh | National League | Pittsburgh, PA | |
| Harry Staley | staley001har | 1891 | 31 g. | Boston | National League | Boston, MA | |
| George Stallings | stalli002geo | 1891 | 3/22-11/22 | San Jose Dukes | California League | San Jose, CA | |
| George Stalze | stalze001geo | 1891 | 4/25-9/26 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Matt Stanley | stanle001mat | 1891 | Stockton | Independent | Stockton, CA | ||
| Matt Stanley | stanle001mat | 1891 | 9/1 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Frank Stapleton | staple003fra | 1891 | +4/19+ | Fresno | Independent | Fresno, CA | |
| Frank Stapleton | staple003fra | 1891 | 5/30-8/9 | Sacramento Senators | California League | Sacramento, CA | |
| Dan Stearns | stearn002dan | 1891 | 4/17-9/13 | Kansas City Blues | Western Association | Kansas City, MO | |
| Steemer | steeme001--- | 1891 | 7/4-7/9 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Steen | steen-003--- | 1891 | Chicago Brands | Chicago City League | Chicago, IL | ||
| Gene Steere | steere001gen | 1891-93 | Brown University | College | , | ||
| Stein | stein-001--- | 1891 | 5/20-6/6 | Hartford | Connecticut State League | Hartford, CT | |
| Stein | stein-017--- | 1891 | Chicago Franklins | Chicago City League | Chicago, IL | ||
| Ed Stein | stein-001ed- | 1891 | 14 g. | Chicago | National League | Chicago, IL | |
| Ed Stein | stein-001ed- | 1891 | 8/15-9/12 | Omaha Lambs | Western Association | Omaha, NE | |
| Stellwagon | stellw001--- | 1891 | Ishpeming | Upper Peninsula League | Ishpeming, MI | ||
| Jake Stenzel | stenze001jak | 1891 | 4/15-10/4 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Ben Stephens | stephe001ben | 1891 | 3/22-6/7 | Oakland Colonels | California League | Oakland, CA | |
| Ben Stephens | stephe001ben | 1891 | +6/23-7/13+ | Peoria Distillers | Northwestern League | Peoria, IL | |
| Ben Stephens | stephe001ben | 1891 | 7/19-7/29 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Ben Stephens | stephe001ben | 1891 | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | ||
| Benjamin Stephens | stephe002ben | 1891 | 5/14-8/15 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| Clarence Stephens | stephe001cla | 1891 | 9/23 | 1 g. | Cincinnati | National League | Cincinnati, OH |
| Charles Sterling | 1891 | Camden Cooling Club | Independent | Camden, NJ | |||
| Robert Sterling | sterli003rob | 1891 | Camden Cooling Club | Independent | Camden, NJ | ||
| Frank Stetson | stetso001fra | 1891 | 7/17-7/31 | Woonsocket | New England League | Woonsocket, RI | |
| Henry Stevens | steven001hen | 1891 | 6/11-7/2 | Woonsocket | New England League | Woonsocket, RI | |
| William Stevens | steven010wil | 1891 | 5/2-5/10 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| William Stevens | steven010wil | 1891 | 5/21-7/5 | Oakland Colonels | California League | Oakland, CA | |
| William Stevens | steven010wil | 1891 | 8/13-8/16 | Sacramento Senators | California League | Sacramento, CA | |
| Sam Stevenson | steven001sam | 1891 | 21 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Ace Stewart | stewar001ace | 1891 | 5/26- | 83 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI |
| Ace Stewart | stewar001ace | 1891 | -9/ | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI | |
| Will Stickney | stickn001wil | 1891 | Stockton | Independent | Stockton, CA | ||
| Horace Stillman | stillm001hor | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Jack Stivetts | stivet001jac | 1891 | 85 g. | St. Louis Browns | American Association | St. Louis, MO | |
| Len Stockwell | stockw001len | 1891 | 6/17-9/2 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| James Stokes | stokes008--- | 1891 | 19 g. | Appleton Papermakers | Wisconsin State League | Appleton, WI | |
| Stoltz/Stroltz | stoltz002--- | 1891 | 7/19 | Oakland Colonels | California League | Oakland, CA | |
| George Stovey | stovey001geo | 1891 | 5/2- | 3 g. | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT |
| George Stovey | stovey001geo | 1891 | New York Gorhams | Independent | New York, NY | ||
| Harry Stovey | stovey001har | 1891 | 134 g. | Boston | National League | Boston, MA | |
| Denny Strand | strand001den | 1891 | 9/28-10/10 | Oakland Colonels | California League | Oakland, CA | |
| Frank Stratton | stratt001s-- | 1891 | Ocala FL | Independent | Ocala, FL | ||
| Frank Stratton | stratt001s-- | 1891 | 4/30-5/1 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Frank Stratton | stratt001s-- | 1891 | 5/9-5/22 | Dayton | Northwestern League | Dayton, OH | |
| Frank Stratton | stratt001s-- | 1891 | Marquette Undertakers | Upper Peninsula League | Marquette, WI | ||
| Scott Stratton | stratt001sco | 1891 | 2 g. | Pittsburgh | National League | Pittsburgh, PA | |
| Scott Stratton | stratt001sco | 1891 | 34 g. | Louisville | American Association | Louisville, KY | |
| Robert Straub | 1891 | Appleton Papermakers | Wisconsin State League | Appleton, WI | |||
| Joe Strauss | straus001joe | 1891 | 4/17-9/5 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Cub Stricker | strick001cub | 1891 | 139 g. | Boston | American Association | Boston, MA | |
| Frank Striffler | striff000fra | 1891 | 5/14-? | Meadville | New York-Pennsylvania League | Meadville, NY | |
| Con Strothers | stroth001joh | 1891 | 6/- | Umpire | PacNW | , | |
| Tony Suck | suck--001ton | 1891 | 5/17-10/25 | Umpire | ChicCity | , | |
| Harry Suggs | suggs-001har | 1891 | 8/21-9/2 | Umpire | Il-Ia | , | |
| Sullivan | sulliv028--- | 1891 | 7/4 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Sullivan | sulliv125--- | 1891 | Chicago Franklins | Chicago City League | Chicago, IL | ||
| Bill Sullivan | sulliv002bil | 1891 | 5/2-5/11 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Dennis Sullivan | sulliv003den | 1891 | 4/30-7/18 | Lynn | New England League | Lynn, MA | |
| Edward Sullivan | sulliv004edw | 1891 | 5/7-7/18 | Salem | New England League | Salem, MA | |
| Jim Sullivan | sulliv006jam | 1891 | Petaluma | Independent | Petaluma, CA | ||
| Jim Sullivan | sulliv001jim | 1891 | 4/22- | 1 g. | Boston | National League | Boston, MA |
| Jim Sullivan | sulliv001jim | 1891 | 1 g. | Columbus | American Association | Columbus, OH | |
| Jim Sullivan | sulliv001jim | 1891 | 5/7-5/23 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Marty Sullivan | sulliv003mar | 1891 | 17 g. | Boston | National League | Boston, MA | |
| Marty Sullivan | sulliv003mar | 1891 | 1 g. | Cleveland | National League | Cleveland, OH | |
| Mike Sullivan | sulliv002mik | 1891 | 4/27-7/25 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Mike Sullivan | sulliv002mik | 1891 | 8/8-8/14 | Troy Trojans | Eastern Association | Troy, NY | |
| Mike Sullivan | sulliv002mik | 1891 | 2 g. | Philadelphia | American Association | Philadelphia, PA | |
| Mike Sullivan | sulliv002mik | 1891 | 3 g. | New York | National League | New York, NY | |
| Sleeper Sullivan | sulliv001sle | 1891 | 5/6-6/8 | Lynn | New England League | Lynn, MA | |
| William Sullivan | sulliv009wil | 1891 | 4/30-8/1 | Worcester | New England League | Worcester, MA | |
| Kid Summers | summer001kid | 1891 | 5/16-7/16 | Dayton | Northwestern League | Dayton, OH | |
| Kid Summers | summer001kid | 1891 | 7/28-8/29 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Kid Summers | summer001kid | 1891 | -9/21 | 18 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI |
| Art Sunday | sunday001art | 1891 | 3/22-8/9 | Sacramento Senators | California League | Sacramento, CA | |
| Art Sunday | sunday001art | 1891 | 8/19-10/4 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Elmer Sutcliffe | sutcli001sy- | 1891 | 4/16-7/12 | Omaha Lambs | Western Association | Omaha, NE | |
| Elmer Sutcliffe | sutcli001sy- | 1891 | 53 g. | Washington | American Association | Washington, DC | |
| Ed Swartwood | swartw001ed- | 1891 | 4/16-9/13 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Park Swartzel | swartz001par | 1891 | 4/21-8/21 | Kansas City Blues | Western Association | Kansas City, MO | |
| Dan Sweeney | sweene001dan | 1891 | 3/22-11/22 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Dan Sweeney | sweene004dan | 1891 | 59 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| Frank Sweeney | sweene001fra | 1891 | 6/10-7/31 | Woonsocket | New England League | Woonsocket, RI | |
| Pete Sweeney | sweene001pet | 1891 | 4/25-8/22 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Pete Sweeney | sweene001pet | 1891 | 9/6-11/22 | Oakland Colonels | California League | Oakland, CA | |
| Pop Swett | swett-001pop | 1891 | 3/22-11/22 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Mart Swift | swift-002mar | 1891 | 5/16-6/20 | Dayton | Northwestern League | Dayton, OH | |
| Mart Swift | swift-002mar | 1891 | Reading | Independent | Reading, PA | ||
| John Taber | taber-001joh | 1891 | 5/8-7/17 | Worcester | New England League | Worcester, MA | |
| Tart | tart--001--- | 1891 | 5/9-6/8 | Bay City | Northwestern League | Bay City, MI | |
| Tart | tart--001--- | 1891 | Oconto Log Drivers | Wisconsin State League | Oconto, WI | ||
| Edward Tate | tate--001pop | 1891 | 4/25-7/3 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Harry Taylor | taylor006har | 1891 | 91 g. | Louisville | American Association | Louisville, KY | |
| Jack Taylor | taylor004jac | 1891 | Manhattan Col.? | College | , | ||
| Jack Taylor | taylor004jac | 1891 | 4/26-7/11 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Jack Taylor | taylor004jac | 1891 | 7/17-8/7 | Troy Trojans | Eastern Association | Troy, NY | |
| Jack Taylor | taylor004jac | 1891 | 9/16 | 1 g. | New York | National League | New York, NY |
| Jack Taylor | taylor004jac | 1891 | 9/19- | WNBrig-Corinthian | Independent | , | |
| Rudd Taylor | taylor001rud | 1891 | 5/15-7/14 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| Wally Taylor | taylor001wal | 1891 | 4/30-8/29 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Wally Taylor | taylor001wal | 1891 | 9/8 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Al Tebeau | tebeau002al- | 1891 | 4/30-9/8 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| George Tebeau | tebeau002geo | 1891 | 4/16-9/16 | Denver Mountaineers | Western Association | Denver, CO | |
| Patsy Tebeau | tebeau001pat | 1891 | 61 g. | Cleveland | National League | Cleveland, OH | |
| Pussy Tebeau | tebeau001pus | 1891 | 6/10-8/1 | Lewiston | New England League | Lewiston, ME | |
| Tebo | tebo--001--- | 1891 | 6/10 | Woonsocket | New England League | Woonsocket, RI | |
| Fred Tenney | tenney001fre | 1891 | Wauskuck | RI | Wauskuck, | ||
| P. Tenney | 1891 | no g. | Denver Mountaineers | Western Association | Denver, CO | ||
| Edmund Terrien | terrie001edm | 1891 | 68 g. | Peoria Distillers | Northwestern League | Peoria, IL | |
| Edmund Terrien | terrie001edm | 1891 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | ||
| Edmund Terrien | terrie001edm | 1891 | 27 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Winslow Terrill | terril001win | 1891 | +6/4 | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT | |
| Winslow Terrill | terril001win | 1891 | Cuban Giants | Independent | Cuban, | ||
| Adonis Terry | terry-001ado | 1891 | 30 g. | Brooklyn | National League | Brooklyn, NY | |
| Joseph Theisen | theise001jos | 1891 | 5/2- | Meriden | Connecticut State League | Meriden, CT | |
| Joseph Theisen | theise001jos | 1891 | 6/19-8/14 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Thomas | thomas081--- | 1891 | Mt. Pleasant | Independent | Mt. Pleasant, NH | ||
| Thomas | thomas081--- | 1891 | +5/30- | West Haven | Connecticut State League | West Haven, CT | |
| Thomas | thomas045--- | 1891 | 2 g. | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Thomas | 1891 | Joplin | Southwest League | Joplin, MO | |||
| Arthur Thomas | thomas005art | 1891 | New York Gorhams | Independent | New York, NY | ||
| Sam Thompson | thomps002sam | 1891 | 133 g. | Philadelphia | National League | Philadelphia, PA | |
| John Thornton | thornt003joh | 1891 | 39 g. | Philadelphia | National League | Philadelphia, PA | |
| William Thornton | thornt002wil | 1891 | Dover NH | Independent | Dover, NH | ||
| Thorpe | thorpe004--- | 1891 | Marquette Undertakers | Upper Peninsula League | Marquette, WI | ||
| Charles Thorpe | thorpe002cha | 1891 | 23 g. | Appleton Papermakers | Wisconsin State League | Appleton, WI | |
| Frank Thyne | thyne-001fra | 1891 | Lowe.-Burke | Independent | Lowell, MA | ||
| Mike Tiernan | tierna001mik | 1891 | 134 g. | New York | National League | New York, NY | |
| Tierney | tierne002--- | 1891 | 4/25-4/30 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Tierney | tierne002--- | 1891 | +5/22 | Norwich | Connecticut State League | Norwich, CT | |
| Jack Tighe | tighe-001joh | 1891 | Scranton | Independent | Scranton, PA | ||
| Colonel Tillman | tillma001col | 1891 | 9/13-9/20 | Oakland Colonels | California League | Oakland, CA | |
| Ledell Titcomb | titcom001can | 1891 | 4/27-5/2 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Ledell Titcomb | titcom001can | 1891 | 5/27 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Pole Titter | titter001pol | 1891 | Weir City | Southwest League | Weir City, KS | ||
| Tommy Titter | titter001tom | 1891 | Weir City | Southwest League | Weir City, KS | ||
| Tobin | tobin-015--- | 1891 | +5/27- | Portland | New England League | Portland, ME | |
| Tobin | tobin-007--- | 1891 | Portland | Connecticut State League | Portland, CT | ||
| Frank Todd | todd--002fra | 1891 | Aberdeen Nonpareil | Independent | Aberdeen, SD | ||
| C. Tolivar | 1891 | Rock Island IL | Independent | Rock Island, IL | |||
| Phil Tomney | tomney001phi | 1891 | 4/16-7/4 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| James Toohey | twohey001jam | 1891 | 4/27-5/7 | Troy Trojans | Eastern Association | Troy, NY | |
| James Toohey | twohey001jam | 1891 | 5/18-8/8 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Frank Torreyson | torrey001fra | 1891 | Erie | New York-Pennsylvania League | Erie, PA | ||
| Thayer Torreyson | torrey001tha | 1891 | 5/14-6/24 | Erie | New York-Pennsylvania League | Erie, PA | |
| George Townsend | townse002geo | 1891 | -10/8 | 61 g. | Baltimore | American Association | Baltimore, MD |
| Ike Toy | toy---001isa | 1891 | Camden | Independent | Camden, NJ | ||
| Tracy | tracy-009--- | 1891 | Mt. Pleasant | Independent | Mt. Pleasant, NH | ||
| Tracy | tracy-009--- | 1891 | 5/30- | West Haven | Connecticut State League | West Haven, CT | |
| Bill Traffley | traffl001bil | 1891 | 4/18-4/30 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Bill Traffley | traffl001bil | 1891 | 5/13-9/8 | Omaha Lambs | Western Association | Omaha, NE | |
| Trainer | traine003--- | 1891 | Houghton | Upper Peninsula League | Houghton, MI | ||
| Charles Trask | trask-001cha | 1891 | 5/2-5/21 | Salem | New England League | Salem, MA | |
| Grant Travis | travis001gra | 1891 | Webb City | Southwest League | Webb City, MO | ||
| Ed Tray | tray--001edw | 1891 | Ishpeming | Upper Peninsula League | Ishpeming, MI | ||
| Jim Tray | tray--001edw | 1891 | -8/ | Ishpeming | Upper Peninsula League | Ishpeming, MI | |
| J. Traynor | trayno000j-- | 1891 | -10/25 | Chicago Rivals | Chicago City League | Chicago, IL | |
| George Treadway | treadw001geo | 1891 | 5/5-5/12 | Denver Mountaineers | Western Association | Denver, CO | |
| George Treadway | treadw001geo | 1891 | 5/20-8/19 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| George Treadway | treadw001geo | 1891 | 8/- | 23 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI |
| Treat | treat-001--- | 1891 | 7/4 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| M. B. Tredway | 1891 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |||
| Mike Trost | trost-001mik | 1891 | no g. | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Mike Trost | trost-001mik | 1891 | 5/9-7/16 | Peoria Distillers | Northwestern League | Peoria, IL | |
| Mike Trost | trost-001mik | 1891 | 7/22-9/9 | Erie | New York-Pennsylvania League | Erie, PA | |
| Sam Trott | trott-001sam | 1891 | 4/8-4/25 | g. | Washington | American Association | Washington, DC |
| Sam Trott | trott-001sam | 1891 | 6/-9/26 | Troy Trojans | Eastern Association | Troy, NY | |
| Harry Truby | truby-002har | 1891 | 5/26- | 78 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI |
| Harry Truby | truby-002har | 1891 | -9/ | Fond du Lac Mud Hens | Wisconsin State League | Fond du Lac, WI | |
| Charles Trusty | 1891 | 8/13 | Lambertville NJ | Independent | Lambertville, NJ | ||
| Job Trusty | trusty001job | 1891 | 6/-7/,9/ | Cuban Giants | Independent | Cuban, | |
| Job Trusty | trusty001job | 1891 | 7/-8/ | Lambertville NJ | Independent | Lambertville, NJ | |
| Tommy Tucker | tucker003tho | 1891 | 140 g. | Boston | National League | Boston, MA | |
| William Tuckerman | tucker006wil | 1891 | 4/28-7/9 | Providence Clamdiggers | Eastern Association | Providence, RI | |
| Andrew Tully | tully-001and | 1891 | 4/15-5/8 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Andrew Tully | tully-001and | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Andrew Tully | tully-001and | 1891 | 9/15-9/17 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Paddy Tuohy | toohey001jam | 1891 | 4/27-5/7 | Troy Trojans | Eastern Association | Troy, NY | |
| Paddy Tuohy | toohey001jam | 1891 | 5/18-8/8 | Lebanon Cedars | Eastern Association | Lebanon, PA | |
| Thomas Turner | turner006tho | 1891 | 4/15-10/4 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Tuck Turner | turner002tuc | 1891 | WN.Brig-Corinthian | Independent | , | ||
| Lee Tutt | tutt--001--- | 1891 | +8/10+ | GF-Tribune | Independent | , | |
| Art Twineham | twineh002art | 1891 | 4/15-5/7 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Art Twineham | twineh002art | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| Art Twineham | twineh002art | 1891 | Wallace iD | Independent | Wallace, ID | ||
| Larry Twitchell | twitch001lar | 1891 | 4/16-7/12 | Omaha Lambs | Western Association | Omaha, NE | |
| Larry Twitchell | twitch001lar | 1891 | 57 g. | Columbus | American Association | Columbus, OH | |
| Fred Underwood | underw002fre | 1891 | 4/30-8/27+ | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Fred Underwood | underw002fre | 1891 | 9/13 | Kansas City Blues | Western Association | Kansas City, MO | |
| Uplander | upland002--- | 1891 | +5/9- | Hartford | Connecticut State League | Hartford, CT | |
| Bill Urquhart | urquha001wil | 1891 | 4/25-8/25 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Thomas Vallelly | vallel001tho | 1891 | 5/11-5/12 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Hobart Van Alstyne | vanals001hob | 1891 | 5/14-9/9 | Olean | New York-Pennsylvania League | Olean, NY | |
| Van Buren | vanbur002--- | 1891 | 5/4-5/22 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| George Van Dommelle | vandom001geo | 1891 | 5/5 | Lynn | New England League | Lynn, MA | |
| Bill Van Dyke | vandyk001bil | 1891 | 4/16-9/3 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| George Van Haltren | vanhal001geo | 1891 | 139 g. | Baltimore | American Association | Baltimore, MD | |
| W.L. Van Horn | vanhor001w-- | 1891 | 6/1-6/14 | Denver Mountaineers | Western Association | Denver, CO | |
| Dick Van Zant | vanzan001dic | 1891 | 3/22-5/17 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Dick Van Zant | vanzan001dic | 1891 | 5/27-8/20 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Dick Van Zant | vanzan001dic | 1891 | 8/23-10/4 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Vandecar | vandec001--- | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| Farmer Vaughn | vaughn001far | 1891 | 51 g. | Cincinnati | American Association | Cincinnati, OH | |
| Farmer Vaughn | vaughn001far | 1891 | 25 g. | Milwaukee | American Association | Milwaukee, WI | |
| J.C. Velder | velder001j-- | 1891 | 5/14- | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Lee Viau | viau--001lee | 1891 | 45 g. | Cleveland | National League | Cleveland, OH | |
| Philip Viau | viau--001phi | 1891 | no g. | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Tom Vickery | vicker001tom | 1891 | 4/16-8/12 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| Tom Vickery | vicker001tom | 1891 | 14 g. | Chicago | National League | Chicago, IL | |
| Tom Vickery | vicker001tom | 1891 | 4/16-8/13 | Milwaukee Brewers | Western Association | Milwaukee, WI | |
| Jake Virtue | virtue001jak | 1891 | 139 g. | Cleveland | National League | Cleveland, OH | |
| Joe Visner | visner001joe | 1891 | -6/1 | 18 g. | Washington | American Association | Washington, DC |
| Joe Visner | visner001joe | 1891 | 6 g. | St. Louis Browns | American Association | St. Louis, MO | |
| Joe Visner | visner001joe | 1891 | 6/15-8/22 | Rochester Hop Bitters | Eastern Association | Rochester, NY | |
| Peter J. Vogel | vogel-001jak | 1891 | 6/8-6/11 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Jack Wadsworth | wadswo002jac | 1891 | 4/15-10/4 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Woody Wagenhorst | wagenh001woo | 1891 | U. of Pennsylvania | College | , | ||
| Woody Wagenhorst | wagenh001woo | 1891 | Cape May | Independent | Cape May, NJ | ||
| Harry Wait | wait--002--- | 1891 | Houghton | Upper Peninsula League | Houghton, MI | ||
| Fleet Walker | walker001fle | 1891 | , | ||||
| Fleet Walker | walker001--- | 1891 | Oconto Log Drivers | Wisconsin State League | Oconto, WI | ||
| Harry Walker | walker001--- | 1891 | 5/29-6/16 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Harry Walker | walker001--- | 1891 | Decatur IL | Independent | Decatur, IL | ||
| Harry Walker | walker001--- | 1891 | 36 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI | |
| Walt Walker | walker001wal | 1891 | President | NW | , | ||
| Henry Wallace | wallac001--- | 1891 | Missoula | Independent | Missoula, MT | ||
| Joe Walsh | walsh-002joe | 1891 | 4/16-7/12 | Omaha Lambs | Western Association | Omaha, NE | |
| Joe Walsh | walsh-002joe | 1891 | 7/16-7/23 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Joe Walsh | walsh-002joe | 1891 | ?/13 | Omaha Lambs | Western Association | Omaha, NE | |
| Joe Walsh | walsh-002joe | 1891 | 9/3-10/6 | 26 g. | Baltimore | American Association | Baltimore, MD |
| James Ward | ward--008jam | 1891 | +4/19+ | Fresno | Independent | Fresno, CA | |
| John Ward | ward--002mon | 1891 | 105 g. | Brooklyn | National League | Brooklyn, NY | |
| Piggy Ward | ward--002fra | 1891 | 3/22-5/24 | Sacramento Senators | California League | Sacramento, CA | |
| Piggy Ward | ward--002fra | 1891 | 5/31 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Piggy Ward | ward--002fra | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Piggy Ward | ward--002fra | 1891 | 6/7-8/13 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Piggy Ward | ward--002fra | 1891 | 6 g. | Pittsburgh | National League | Pittsburgh, PA | |
| Piggy Ward | ward--002fra | 1891 | 9/15-10/4 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Piggy Ward | ward--002fra | 1891 | 10/18-11/1 | Sacramento Senators | California League | Sacramento, CA | |
| Piggy Ward | ward--002fra | 1891 | Umpire | Calif | , | ||
| Waters | waters002--- | 1891 | 1 g. | Fort Wayne | Northwestern League | Fort Wayne, IN | |
| Bill Watkins | watkin002bil | 1891 | 4/16-6/16 | St. Paul Apostles/Duluth Whalebacks | Western Association | St. Paul, MN | |
| Bill Watkins | watkin002bil | 1891 | 6/17-8/17 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| J.W. Watkins | watkin001j-- | 1891 | Mexico | Mexico, | |||
| J.W. Watkins | watkin001j-- | 1891 | Moberly MO | Moberly, MO | |||
| Farmer Weaver | weaver001far | 1891 | 133 g. | Louisville | American Association | Louisville, KY | |
| John Webb | 1891 | London Stars | Independent | London, ON | |||
| Charlie Weber | weber-003cha | 1891 | 5/5 | Kansas City Blues | Western Association | Kansas City, MO | |
| Charlie Weber | weber-003cha | 1891 | 14 g. | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Edward Webster | webste003edw | 1891 | 4/30-8/1 | Portland | New England League | Portland, ME | |
| Pete Weckbecker | weckbe001pet | 1891 | 4/27-9/26 | Buffalo Bisons | Eastern Association | Buffalo, NY | |
| William Wehrle | wehrle002wil | 1891 | ? | Tx | , TX | ||
| William Wehrle | wehrle002wil | 1891 | 6/12-6/24 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| William Wehrle | wehrle002wil | 1891 | 6/26-8/3 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Jake Weihl | weihl-001jak | 1891 | 4/30-9/8 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Frank Weikart | weiker001fra | 1891 | Carthage | Southwest League | Carthage, MO | ||
| Curt Welch | welch-001cur | 1891 | 132 g. | Baltimore | American Association | Baltimore, MD | |
| Mickey Welch | welch-003mic | 1891 | 22 g. | New York | National League | New York, NY | |
| Thomas Welch | welch-002tho | 1891 | 5/14-8/27 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Thomas Welch | welch-002tho | 1891 | Lock Haven PA | Independent | Lock Haven, PA | ||
| Tub Welch | welch-001tub | 1891 | 47 g. | Dayton | Northwestern League | Dayton, OH | |
| Wellington | wellin001--- | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| Wells | 1891 | Pittsburg | Southwest League | Pittsburg, KS | |||
| Frank Wells | wells-002fra | 1891 | 5/5-6/10 | Waterbury | Connecticut State League | Waterbury, CT | |
| Frank Wells | wells-002fra | 1891 | 6/13-6/18 | Atlanta | So | Atlanta, GA | |
| Jake Wells | wells-001jak | 1891 | 4/25-9/26 | Troy Trojans | Eastern Association | Troy, NY | |
| Patrick Welsh | welsh-001pat | 1891 | 4/15-5/30 | Spokane Bunch Grassers | Pacific Northwestern League | Spokane, WA | |
| Patrick J.? Welsh | welch-032--- | 1891 | 7/13-7/15+ | Davenport Pilgrims | Illinois-Iowa League | Davenport, IA | |
| Jack Wentz | wentz-001jac | 1891 | 4/15 | 1 g. | Louisville | American Association | Louisville, KY |
| Jack Wentz | wentz-001jac | 1891 | 67 g. | Evansville Hoosiers | Northwestern League | Evansville, IN | |
| Jack Wentz | wentz-001jac | 1891 | 30 g. | Marinette Lumber Shovers | Wisconsin State League | Marinette, WI | |
| Werche | 1891 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |||
| Perry Werden | werden001per | 1891 | 139 g. | Baltimore | American Association | Baltimore, MD | |
| Joe Werrick | werric001joe | 1891 | 4/16-9/13 | Denver Mountaineers | Western Association | Denver, CO | |
| Buck West | west--001buc | 1891 | 4/25-8/25 | Syracuse Stars | Eastern Association | Syracuse, NY | |
| Bob Westlake | westla001rob | 1891 | 4/30-8/1 | Portland | New England League | Portland, ME | |
| Bob Westlake | westla001rob | 1891 | East Liverpool | Independent | East Liverpool, OH | ||
| George Westlake | westla002geo | 1891 | 4/15- | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| George Westlake | westla002geo | 1891 | La Grande Grand Rhonders | Pacific Interstate League | La Grande, OR | ||
| George Westlake | westla002geo | 1891 | -7/28 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| William Wetzel | wetzel002wil | 1891 | Williamsport Demorest | Independent | Williamsport, PA | ||
| Gus Weyhing | weyhin001aug | 1891 | 54 g. | Philadelphia | American Association | Philadelphia, PA | |
| John Whalen | whalen003joh | 1891 | 53 g. | Bay City | Northwestern League | Bay City, MI | |
| John Whalen | whalen003joh | 1891 | Grand Rapids Shamrocks | Northwestern League | Grand Rapids, MI | ||
| Wheeler | wheele015--- | 1891 | 5/2- | Norwich | Connecticut State League | Norwich, CT | |
| Harry Wheeler | wheele002har | 1891 | 4/ | Cincinnati Shamrocks | Independent | Cincinnati, OH | |
| Bobby Wheelock | wheelo001bob | 1891 | 136 g. | Columbus | American Association | Columbus, OH | |
| George Whinnery | whinne001geo | 1891 | 8/17 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Lew Whistler | whistl002lew | 1891 | 72 g. | New York | National League | New York, NY | |
| Pat Whitaker | whitak001pat | 1891 | 6/20-7/16+ | Bradford | New York-Pennsylvania League | Bradford, PA | |
| Bill White | white-003bil | 1891 | 4/18-6/21 | Denver Mountaineers | Western Association | Denver, CO | |
| Bill White | white-003bil | 1891 | 7/22-8/19 | Minneapolis Millers | Western Association | Minneapolis, MN | |
| Bob White | white-002bob | 1891 | 4/30-6/16 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Bob White | white-002bob | 1891 | 55 g. | Oconto Log Drivers | Wisconsin State League | Oconto, WI | |
| Deacon White | white-002dea | 1891 | 6/15-7/3 | Elmira Gladiators | New York-Pennsylvania League | Elmira, NY | |
| Frank White | white-008fra | 1891 | 7/28 | Albany Senators | Eastern Association | Albany, NY | |
| Sol White | white-001kin | 1891 | 5/2- | 4 g. | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT |
| Milt Whitehead | whiteh001mil | 1891 | 4/18 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Milt Whitehead | whiteh001mil | 1891 | 6/27-7/8 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Milt Whitehead | whiteh001mil | 1891 | 7/25-9/13 | Omaha Lambs | Western Association | Omaha, NE | |
| Milt Whitehead | whiteh001mil | 1891 | 9/19-10/4 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Guerdon Whiteley | whitel001gue | 1891 | Bellingham Bay | PugSound | Bellingham Bay, WA | ||
| Guerdon Whiteley | whitel001gue | 1891 | Pendleton Ho Hos | Pacific Interstate League | Pendleton, OR | ||
| E. S. Whiting | 1891 | Camden AA | Independent | Camden, NJ | |||
| Hobe Whiting | whitin001hob | 1891 | 5/6-5/19 | Waterbury | Connecticut State League | Waterbury, CT | |
| Hobe Whiting | whitin001hob | 1891 | 5/26-6/10+ | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| W. L. Whiting | 1891 | Camden AA | Independent | Camden, NJ | |||
| Art Whitney | whitne002art | 1891 | 93 g. | Cincinnati | American Association | Cincinnati, OH | |
| Art Whitney | whitne002art | 1891 | 3 g. | St. Louis Browns | American Association | St. Louis, MO | |
| Charles Whittaker | whitta001cha | 1891 | Portland Gladiators | Portland, OR | |||
| C.W. Wickizer | wickhe001c-- | 1891 | 6/20-7/5+ | Philipsburg MT | Independent | Phillipsburg, MT | |
| Wild Bill Widner | widner001wil | 1891 | 4/ | Cincinnati Shamrocks | Independent | Cincinnati, OH | |
| Wild Bill Widner | widner001wil | 1891 | 5/13-6/2 | Sioux City Corn Huskers | Western Association | Sioux City, IA | |
| Wild Bill Widner | widner001wil | 1891 | 7/23 | 1 g. | Cincinnati | American Association | Cincinnati, OH |
| Andrew Wiedman | weidma001and | 1891 | 7/27 | Troy Trojans | Eastern Association | Troy, NY | |
| Wikersham | wikers001--- | 1891 | Baker City Bunch Grassers | Pacific Interstate League | Baker City, OR | ||
| George Wilbur | wilbur002geo | 1891 | Marquette Undertakers | Upper Peninsula League | Marquette, WI | ||
| Ace Wilder | wilder001al- | 1891 | UppPenin | , | |||
| Ace Wilder | wilder001al- | 1891 | 45 g. | Oshkosh Indians | Wisconsin State League | Oshkosh, WI | |
| W. W. Wilkinson | 1891 | Aberdeen Nonpareil | Independent | Aberdeen, SD | |||
| Frank Will | wills-002fra | 1891 | Bloomington Pasttimes | Independent | Bloomington, IL | ||
| Williams | willia224--- | 1891 | 6/15 | Woonsocket | New England League | Woonsocket, RI | |
| Charles Williams | willia015cha | 1891 | 5/14-7/22 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| Charles Williams | willia015cha | 1891 | 7/29-8/17 | Jamestown | New York-Pennsylvania League | Jamestown, NY | |
| Clarence Williams | willia010cla | 1891 | 5/2- | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT | |
| Clarence Williams | willia010cla | 1891 | New York Gorhams | Independent | New York, NY | ||
| Edward Williams | willia013edw | 1891 | 4/30-8/29 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| George Williams | willia008geo | 1891 | New York Gorhams | Independent | New York, NY | ||
| Tom Williams | willia004tom | 1891 | Canton | Independent | Canton, OH | ||
| Henry Willig | willig001hen | 1891 | Will.-YMCA | Independent | Williamsport, PA | ||
| Charles Willis | willis005cha | 1891 | 4/30-8/1 | Portland | New England League | Portland, ME | |
| Charles Willis | willis005cha | 1891 | 8/11-9/26 | Albany Senators | Eastern Association | Albany, NY | |
| William Wilmington | wilmin001wil | 1891 | 5/9-5/30 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Walt Wilmot | wilmot001wal | 1891 | 121 g. | Chicago | National League | Chicago, IL | |
| Bert Wilson | wilson004ber | 1891 | no g. | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Bill Wilson | wilson026wil | 1891 | 4/21-8/29 | Kansas City Blues | Western Association | Kansas City, MO | |
| Bill Wilson | wilson003bil | 1891 | Salt Lake City | Independent | Salt Lake City, UT | ||
| George Wilson | wilson018geo | 1891 | Carthage | Southwest League | Carthage, MO | ||
| Henry Wilson | wilson004hen | 1891 | 7/10 | Dayton | Northwestern League | Dayton, OH | |
| Parke Wilson | wilson001par | 1891 | 4/16-8/21 | Lincoln Rustlers | Western Association | Lincoln, NE | |
| Parke Wilson | wilson001par | 1891 | 9/19-10/4 | Portland Gladiators | Pacific Northwestern League | Portland, OR | |
| Parke Wilson | wilson001par | 1891 | Oakland Colonels | California League | Oakland, CA | ||
| Tug Wilson | wilson001tug | 1891 | 4/25-7/1 | New Haven Nutmegs | Eastern Association | New Haven, CT | |
| Tug Wilson | wilson001tug | 1891 | 7/12-8/29 | Denver Mountaineers | Western Association | Denver, CO | |
| W. Wilson | wilson007w-- | 1891 | Worcester | New England League | Worcester, MA | ||
| Wingard | wingar002--- | 1891 | Walla Walla Walla Wallas | Pacific Interstate League | Walla Walla, WA | ||
| Charles Wirsche | wirsch001cha | 1891 | 4/30-9/2 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Fred Wirth | wirth-002--- | 1891 | Scranton | Independent | Scranton, PA | ||
| Nick Wise | wise--002nic | 1891 | 5/5-5/6 | Salem | New England League | Salem, MA | |
| Sam Wise | wise--001sam | 1891 | 103 g. | Baltimore | American Association | Baltimore, MD | |
| Ed Wiswell | wiswel001ed- | 1891 | 4/30-6/16 | Aurora Maroons | Illinois-Iowa League | Aurora, IL | |
| Ed Wiswell | wiswel001ed- | 1891 | 7/9-9/2 | Rockford Hustlers | Illinois-Iowa League | Rockford, IL | |
| Bill Wittrock | whitro001bil | 1891 | 35 g. | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Bill Wittrock | whitro001bil | 1891 | 7/25-8/27 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| Bill Wittrock | whitro001bil | 1891 | 9/2-9/8 | Quincy Ravens | Illinois-Iowa League | Quincy, IL | |
| Chicken Wolf | wolf--001chi | 1891 | 136 g. | Louisville | American Association | Louisville, KY | |
| DeLoss Wood | wood--002del | 1891 | 4/30-8/29 | Cedar Rapids Canaries | Illinois-Iowa League | Cedar Rapids, IA | |
| George Wood | wood--004geo | 1891 | 132 g. | Philadelphia | American Association | Philadelphia, PA | |
| Jeff Wood | wood--001jef | 1891 | Tilsonburg ONT | Independent | Tilsonburg, ON | ||
| Fred Woodcock | woodco001fre | 1891 | Northampton | Independent | Northampton, MA | ||
| Woods | 1891 | +6/4 | Ansonia Cuban Giants | Connecticut State League | Ansonia, CT | ||
| William Work | works-001wil | 1891 | 3/27-8/9 | Sacramento Senators | California League | Sacramento, CA | |
| William Work | works-001wil | 1891 | 8/19-10/4 | Tacoma | Pacific Northwestern League | Tacoma, WA | |
| Harry Wright | wright004har | 1891 | Philadelphia | National League | Philadelphia, PA | ||
| Joe Wright | wright001joe | 1891 | 90 g. | Appleton Papermakers | Wisconsin State League | Appleton, WI | |
| Pat Wright | wright003pat | 1891 | 5/9-7/16 | Peoria Distillers | Northwestern League | Peoria, IL | |
| Pat Wright | wright003pat | 1891 | 7/21-7/29 | Terre Haute Hottentots | Northwestern League | Terre Haute, IN | |
| Pat Wright | wright003pat | 1891 | 31 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Pat Wright | wright003pat | 1891 | 31 g. | Green Bay Dock Wallopers | Wisconsin State League | Green Bay, WI | |
| Rasty Wright | wright001ras | 1891 | 25 g. | Detroit Wolverines | Northwestern League | Detroit, MI | |
| Rasty Wright | wright001ras | 1891 | 6/19-8/17 | St. Paul Apostles/Duluth Whalebacks | Western Association | Duluth, MN | |
| Rasty Wright | wright001ras | 1891 | 8/22-9/13 | Omaha Lambs | Western Association | Omaha, NE | |
| Writh | 1891 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |||
| Fred Wunder | wunder001fre | 1891 | 7/31-8/1 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| Will Wynne | wynne-002bil | 1891 | , | ||||
| John Yarwood | yarwoo001joh | 1891 | 5/6 | Worcester | New England League | Worcester, MA | |
| Billy York | york--001wil | 1891 | Jacksonville | Jacksonville, | |||
| Billy York | york--001wil | 1891 | 4/30-6/8 | Ottawa Modocs | Illinois-Iowa League | Ottawa, IL | |
| Billy York | york--001wil | 1891 | +7/3-9/2 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Billy York | york--001wil | 1891 | 9/4-9/8 | Joliet Giants | Illinois-Iowa League | Joliet, IL | |
| Tom York | york--001tom | 1891 | 4/25-5/ | Albany Senators | Eastern Association | Albany, NY | |
| Cy Young | young-001den | 1891 | 55 g. | Cleveland | National League | Cleveland, OH | |
| Otto Young | young-002ott | 1891 | 5/1-8/21 | San Francisco Friscos/Metropolitans | California League | San Francisco, CA | |
| Henry Youngman | youngm001hen | 1891 | 3/22-9/23 | Oakland Colonels | California League | Oakland, CA | |
| William Zecher | zecher001wil | 1891 | 5/9- | 55 g. | Dayton | Northwestern League | Dayton, OH |
| Harry Zell | zell--001har | 1891 | 5/14-8/15 | Meadville | New York-Pennsylvania League | Meadville, NY | |
| George Ziegler | ziegle001geo | 1891 | Chilicothe OH | Independent | Chillicothe, OH | ||
| George Ziegler | ziegle001geo | 1891 | 6/20-6/27 | Olean | New York-Pennsylvania League | Olean, NY | |
| George Ziegler | ziegle002geo | 1891 | -10/25 | Chicago Franklins | Chicago City League | Chicago, IL | |
| Bill Zies | zies--001bil | 1891 | 4/30-8/8 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Bill Zies | zies--001bil | 1891 | 8/9-8/10 | 2 g. | St. Louis Browns | American Association | St. Louis, MO |
| Bill Zies | zies--001bil | 1891 | 8/21-9/2 | Ottumwa Coal Palaces | Illinois-Iowa League | Ottumwa, IA | |
| Charles Zimmer | zimmer001cha | 1891 | 116 g. | Cleveland | National League | Cleveland, OH | |
| Matthew Zimmer | zimmer001mat | 1891 | 4/15-9/15 | Seattle | Pacific Northwestern League | Seattle, WA | |
| Matthew Zimmer | zimmer001mat | 1891 | Umpire | PacNW | , |