American Association (1882-1891)
MLB conference. 9 members in 1891.
Members over time
- Baltimore Orioles (1882 to 1899) 1882 to 1891
- Cincinnati Reds 1882 to 1889
- Louisville Colonels 1882 to 1891
- Philadelphia Athletics (1882 to 1891) 1882 to 1891
- Pittsburgh Pirates 1882 to 1886
- St. Louis Cardinals 1882 to 1891
- Columbus Buckeyes 1883 to 1884
- New York Metropolitans 1883 to 1887
- Indianapolis Hoosiers (1884) 1884
- Los Angeles Dodgers 1884 to 1889
- Richmond Virginians 1884
- Toledo Blue Stockings 1884
- Washington Nationals (1884) 1884
- Cleveland Spiders 1887 to 1888
- Kansas City Cowboys (1888 to 1889) 1888 to 1889
- Columbus Solons 1889 to 1891
- Brooklyn Gladiators 1890
- Rochester Broncos 1890
- Syracuse Stars (1890) 1890
- Toledo Maumees 1890
- Boston Reds (1891) 1891
- Cincinnati Kelly's Killers 1891
- Milwaukee Brewers (1891) 1891
- Washington Senators 1891
Members in 1891
- Baltimore Orioles (1882 to 1899) 1882 to 1899
- Boston Reds (1891) 1891
- Cincinnati Kelly's Killers 1891
- Columbus Solons 1889 to 1891
- Louisville Colonels 1882 to 1899 Formerly Louisville Eclipse
- Milwaukee Brewers (1891) 1891
- Philadelphia Athletics (1882 to 1891) 1882 to 1891
- St. Louis Cardinals Since 1882 Formerly St. Louis Browns, St. Louis Perfectos
- Washington Senators 1891 to 1899 Formerly Washington Statesmen
All-time conference records
| Team | Record | Win % | Seasons as a member |
|---|---|---|---|
| St. Louis Cardinals | 780-429-24 | 64.2% | 1882 to 1891 |
| Philadelphia Athletics (1882 to 1891) | 631-564-24 | 52.7% | 1882 to 1891 |
| Louisville Colonels | 570-635-26 | 47.4% | 1882 to 1891 |
| Cincinnati Reds | 549-395-13 | 58.0% | 1882 to 1889 |
| Baltimore Orioles (1882 to 1899) | 490-601-30 | 45.0% | 1882 to 1891 |
| Los Angeles Dodgers | 408-354-21 | 53.4% | 1884 to 1889 |
| New York Metropolitans | 270-309-13 | 46.7% | 1883 to 1887 |
| Pittsburgh Pirates | 236-296-6 | 44.4% | 1882 to 1886 |
| Columbus Solons | 199-209-10 | 48.8% | 1889 to 1891 |
| Columbus Buckeyes | 101-104-2 | 49.3% | 1883 to 1884 |
| Kansas City Cowboys (1888 to 1889) | 98-171-2 | 36.5% | 1888 to 1889 |
| Boston Reds (1891) | 93-42-4 | 68.3% | 1891 |
| Cleveland Spiders | 90-173-5 | 34.5% | 1887 to 1888 |
| Toledo Maumees | 68-63-3 | 51.9% | 1890 |
| Rochester Broncos | 63-63-7 | 50.0% | 1890 |
| Syracuse Stars (1890) | 54-72-2 | 43.0% | 1890 |
| Toledo Blue Stockings | 45-58-7 | 44.1% | 1884 |
| Cincinnati Kelly's Killers | 43-57-2 | 43.1% | 1891 |
| Washington Senators | 43-92-4 | 32.4% | 1891 |
| Indianapolis Hoosiers (1884) | 29-78-3 | 27.7% | 1884 |
| Brooklyn Gladiators | 27-72-1 | 27.5% | 1890 |
| Milwaukee Brewers (1891) | 21-15 | 58.3% | 1891 |
| Richmond Virginians | 12-29-5 | 31.5% | 1884 |
| Washington Nationals (1884) | 12-51 | 19.0% | 1884 |
Games against fellow members only, counting both teams' conference in the season each game was played.
Most played conference rivalries
| Series | Record | As members |
|---|---|---|
| Louisville Colonels vs St. Louis Cardinals | 118-156-6 | 176 |
| Louisville Colonels vs Philadelphia Athletics (1882 to 1891) | 80-92-4 | 176 |
| Philadelphia Athletics (1882 to 1891) vs St. Louis Cardinals | 72-98-3 | 173 |
| Baltimore Orioles (1882 to 1899) vs St. Louis Cardinals | 116-146-6 | 165 |
| Baltimore Orioles (1882 to 1899) vs Louisville Colonels | 144-108-7 | 161 |
| Baltimore Orioles (1882 to 1899) vs Philadelphia Athletics (1882 to 1891) | 62-88-4 | 154 |
| Cincinnati Reds vs Louisville Colonels | 148-88-3 | 137 |
| Baltimore Orioles (1882 to 1899) vs Cincinnati Reds | 99-135-5 | 137 |
| Cincinnati Reds vs Philadelphia Athletics (1882 to 1891) | 72-64 | 136 |
| Cincinnati Reds vs St. Louis Cardinals | 1193-1317-21 | 132 |
| Cincinnati Reds vs Los Angeles Dodgers | 1168-1219-14 | 107 |
| Baltimore Orioles (1882 to 1899) vs Los Angeles Dodgers | 100-105-6 | 107 |
"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.