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| Given Name: | William Warren |
| Birth Date: | 1844-0-0 |
| Birth City: | Milton |
| Birth Country: | |
| Height: | 70 cm |
| Weight: | 170 kg |
| Bats: | Switch |
| Throws: | Ambidextrous |
| Age: |
| Teams and Years | Batting Average | Hits | At Bats | Home Runs | Runs Batted In | Wins | Losses | Games Pitched In | Strikeouts | Shutouts | Position | Errors | Double Plays | Assists |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1871 Washington Olympics | 0.000 | 0 | 4 | 0 | 0 | 2B | 0 | 0 | 1 | |||||
| 1872 Washington Nationals | 0.289 | 13 | 45 | 0 | 4 | 3B | 10 | 2 | 35 | |||||
| 1872 Washington Nationals | 0.289 | 13 | 45 | 0 | 4 | SS | 3 | 0 | 5 | |||||
| 1873 Washington Blue Legs | 0.269 | 43 | 160 | 0 | 21 | 3B | 76 | 9 | 108 | |||||
| 1873 Washington Blue Legs | 0.269 | 43 | 160 | 0 | 21 | SS | 2 | 0 | 9 | |||||
| 1874 Baltimore Canaries | 0.269 | 57 | 212 | 0 | 18 | 3B | 74 | 6 | 183 | |||||
| 1874 Baltimore Canaries | 0.269 | 57 | 212 | 0 | 18 | C | 7 | 0 | 3 | |||||
| 1875 Chicago White Stockings | 0.247 | 71 | 287 | 0 | 23 | 2B | 2 | 0 | 2 | |||||
| 1875 Chicago White Stockings | 0.247 | 71 | 287 | 0 | 23 | 3B | 54 | 4 | 136 | |||||
| 1875 Chicago White Stockings | 0.247 | 71 | 287 | 0 | 23 | OF | 2 | 0 | 0 | |||||
| 1875 Chicago White Stockings | 0.247 | 71 | 287 | 0 | 23 | SS | 7 | 0 | 17 | |||||
| 1884 Washington Nationals | 0.056 | 1 | 18 | 0 | 0 | 2B | 1 | 0 | 2 | |||||
| 1884 Washington Nationals | 0.056 | 1 | 18 | 0 | 0 | 3B | 4 | 0 | 3 | |||||
| 1884 Washington Nationals | 0.056 | 1 | 18 | 0 | 0 | SS | 2 | 0 | 2 |