| Name | BBrefID | Year | Span | Games | Team | League |
Location |
| John Arthur | arthur001joh | 1903 | +7/28-8/8+ |
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| John Arthurs | | 1903 | | 14 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Jack Brennan | brenna005joh | 1903 | +8/7+ |
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Ralph Cadwalader | cadwal001ral | 1903 | | 14 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Callahan | callah018--- | 1903 | | 23 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Charlie Case | case--001cha | 1903 | | 35 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Walter Crum | crum--001wal | 1903 | | 51 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Guy Dickey | dickey001guy | 1903 | | 113 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Fred Doll | doll--001fre | 1903 | | 14 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Frank Donnelly | donnel002fra | 1903 | | 115 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Eddie? Dwyer | dwyer-015--- | 1903 | 8/2- | 16 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Peaches Graham | graham002geo | 1903 | | 117 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Will Gray | gray--002wil | 1903 | | 17 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Johnny Green | green-001joh | 1903 | | 48 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Al Hecht | hecht-001al- | 1903 | |
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Martin Hoag | hoag--001mar | 1903 | | 15 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| George Hughes | hughes003geo | 1903 | |
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Frank Lakaff | lakaff001fra | 1903 | +8/2+ |
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Tacks Latimer | latime001cli | 1903 | | 21 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Pete Lister | lister001mor | 1903 | | 67 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Clint Martin | martin002cli | 1903 | |
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Bill McGilvray | mcgilv001wil | 1903 | |
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Harry Miller | miller013har | 1903 | | 79 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Daniel O'Leary | oleary001dan | 1903 | | 102 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| John Okey | | 1903 | | preseason
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Edward Powers | | 1903 | |
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Frederick Ransome | ransom001fra | 1903 | |
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| John Rebsamen | rebsam001joh | 1903 | | 50 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Boss Schmidt | schmid001cha | 1903 | 5/1-5/ | 14 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Frank Schneiberg | | 1903 | |
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Ed Smith | smith-001rhe | 1903 | | 23 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Thomas Sullivan | sulliv050--- | 1903 | |
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Dow Van Dine | vandin001dow | 1903 | | 102 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |
| Dolph Wind | wind--001ado | 1903 | | 28 g.
| Rock Island Islanders | Illinois-Indiana-Iowa League |
, |