 Standings at start of day | Results for September 3, 1888 Game 370: St. Paul 9, Sioux City 3 |
| Game 370: Sioux City @ St. Paul St. Paul 9, Sioux City 3 St. Paul Globe  | Game 371: Milwaukee @ Des Moines Des Moines 4, Milwaukee 0 Milwaukee Sentinel  | Game 372: Chicago @ Omaha Chicago 14, Omaha 5 Omaha Daily Bee  |