 Standings at start of day | Results for May 20, 1888 Game 48: Des Moines 14, Kansas City 9 |
| Game 48: Des Moines @ Kansas City Des Moines 14, Kansas City 9 Kansas City Times  | Game 49: Chicago @ Minneapolis Minneapolis 10, Chicago 1 Minneapolis Star Tribune  | Game 50: St. Louis @ Omaha Omaha 6, St. Louis 3 Omaha Daily Bee  | Game 51: St. Paul @ Milwaukee Milwaukee 9, St. Paul 5 Milwaukee Sentinel  |