9 team NA summary for 1871
| Team Name | Year | League | Games | Wins | Losses | W-L% | Park | Attendance |
|---|---|---|---|---|---|---|---|---|
| Philadelphia Athletics | 1871 | NA | 28 | 21 | 7 | 0.750 | Jefferson Street Grounds | 0 |
| Boston Red Stockings | 1871 | NA | 31 | 20 | 10 | 0.667 | South End Grounds I | 0 |
| Chicago White Stockings | 1871 | NA | 28 | 19 | 9 | 0.679 | Union Base-Ball Grounds | 0 |
| New York Mutuals | 1871 | NA | 33 | 16 | 17 | 0.485 | Union Grounds (Brooklyn) | 0 |
| Washington Olympics | 1871 | NA | 32 | 15 | 15 | 0.500 | Olympics Grounds | 0 |
| Troy Haymakers | 1871 | NA | 29 | 13 | 15 | 0.464 | Haymakers' Grounds | 0 |
| Cleveland Forest Citys | 1871 | NA | 29 | 10 | 19 | 0.345 | National Association Grounds | 0 |
| Fort Wayne Kekiongas | 1871 | NA | 19 | 7 | 12 | 0.368 | Hamilton Field | 0 |
| Rockford Forest Citys | 1871 | NA | 25 | 4 | 21 | 0.160 | Agricultural Society Fair Grounds | 0 |
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