 Standings at start of day | Results for July 21, 1888 Game 233: Des Moines 6, Kansas City 3 |
| Game 233: Kansas City @ Des Moines Des Moines 6, Kansas City 3 Kansas City Times  | Game 234: Chicago @ Minneapolis Chicago 2, Minneapolis 0 Minneapolis Star Tribune  | Game 235: Sioux City @ Omaha Sioux City 18, Omaha 3 Omaha Daily Bee  | Game 236: Milwaukee @ St. Paul St. Paul 12, Milwaukee 9 St. Paul Globe  Game 1 | Game 237: Milwaukee @ St. Paul St. Paul 8, Milwaukee 1 St. Paul Globe  Game 2 |