| UA-U | # | ALU | BAU | BOU | CHU | CIU | KCU | MLU | PHU | SLU | SPU | WAU | WIU | UA-U | |||||
| 1884 | 12 | Altoona | Baltimore | Boston | Chicago-Pittsbg | Cincinnati | Kansas City | Milwaukee | Philadelphia | St. Louis | St. Paul | Washington | Wilmington | 1884 | |||||
| Mountain City | Monumentals | Reds | Stogies | Outlaw Reds | Cowboys | Brewers | Keystones | Maroons | Apostles (1) | Nationals | Quicksteps | ||||||||
| to NL | |||||||||||||||||||
| Red Text | Change nickname to match actual | ||||||||||||||||||
| (1) - Also played as White Caps | |||||||||||||||||||
| St. Louis | Maroons | moved to NL in 1885 | |||||||||||||||||
| Cincinnati | Outlaw Reds | ||||||||||||||||||
| Baltimore | Monumentals | ||||||||||||||||||
| Boston | Reds | ||||||||||||||||||
| Milwaukee | Brewers | took over Wilmington | |||||||||||||||||
| St. Paul | Saints | took over Pittsburgh | |||||||||||||||||
| Chicago | Browns | moved to Pittsburgh Stogies in Aug | folded Sep 18 | ||||||||||||||||
| Altoona | Mountain Citys | folded May 31 | |||||||||||||||||
| Wilmington | Quicksteps | took over Philadelphia but will fold Sep 15 | Wilmington, DE | ||||||||||||||||
| Washington | Nationals | ||||||||||||||||||
| Philadelphia | Keystones | folded Aug 7 | |||||||||||||||||
| Kansas City | Cowboys | took over Altoona | |||||||||||||||||