 Standings at start of day | Results for September 11, 1888 St. Paul @ Milwaukee (Postponed to a later date (September 20?)) |
| Game 403: Omaha @ Des Moines Des Moines 8, Omaha 1 Omaha Daily Bee  | Game 404: Sioux City @ Kansas City Kansas City 6, Sioux City 3 Kansas City Times  |