Union Association (1884)
MLB conference. 12 members in 1884.
Members over time
- Altoona Mountain Citys 1884
- Baltimore Monumentals 1884
- Boston Reds (1884) 1884
- Chicago Browns/Pittsburgh Stogies 1884
- Cincinnati Outlaw Reds 1884
- Indianapolis Hoosiers (1884 to 1889) 1884
- Kansas City Cowboys (1884) 1884
- Milwaukee Brewers (1884) 1884
- Philadelphia Keystones 1884
- St. Paul White Caps 1884
- Washington Nationals (1884) 1884
- Wilmington Quicksteps 1884
Members in 1884
- Altoona Mountain Citys 1884
- Baltimore Monumentals 1884
- Boston Reds (1884) 1884
- Chicago Browns/Pittsburgh Stogies 1884
- Cincinnati Outlaw Reds 1884
- Indianapolis Hoosiers (1884 to 1889) 1884 to 1889
- Kansas City Cowboys (1884) 1884
- Milwaukee Brewers (1884) 1884
- Philadelphia Keystones 1884
- St. Paul White Caps 1884
- Washington Nationals (1884) 1884
- Wilmington Quicksteps 1884
All-time conference records
| Team | Record | Win % | Seasons as a member |
|---|---|---|---|
| Indianapolis Hoosiers (1884 to 1889) | 92-20-2 | 81.6% | 1884 |
| Cincinnati Outlaw Reds | 69-33-3 | 67.1% | 1884 |
| Baltimore Monumentals | 57-47-2 | 54.7% | 1884 |
| Boston Reds (1884) | 56-51-4 | 52.3% | 1884 |
| Washington Nationals (1884) | 45-64-5 | 41.7% | 1884 |
| Chicago Browns/Pittsburgh Stogies | 41-49-3 | 45.7% | 1884 |
| Philadelphia Keystones | 21-46 | 31.3% | 1884 |
| Kansas City Cowboys (1884) | 17-62-3 | 22.6% | 1884 |
| Milwaukee Brewers (1884) | 8-4 | 66.7% | 1884 |
| Altoona Mountain Citys | 6-19 | 24.0% | 1884 |
| St. Paul White Caps | 2-6-1 | 27.8% | 1884 |
| Wilmington Quicksteps | 2-15-1 | 13.9% | 1884 |
Games against fellow members only, counting both teams' conference in the season each game was played.
Most played conference rivalries
"As members" counts the meetings played while both teams were in the conference; the record is every MLB meeting.
Against every other conference
| Opponent | Record | Most played |
|---|
Counts each game by both teams' conference in the season it was played. "Series" is how many different pairs of teams met; "Most played" is the pair that met most often while in these two conferences, with how many of those meetings count here; its bar is the whole series.