| Retro ID | Player | Year | Team | History | Is Pitcher? | PA or IP | WAR | Wins | Losses |
|---|---|---|---|---|---|---|---|---|---|
| obrit101 | O'Brien, Tom | 1899 | NY1 | All NY1 | 0 | 621 | 1.8 | 6 | 7 |
| obrit101 | O'Brien, Tom | 1898 | PIT | All PIT | 0 | 449 | -0.1 | 3 | 6 |
| obrit101 | O'Brien, Tom | 1900 | PIT | All PIT | 0 | 410 | 1.3 | 4 | 4 |
| obrit101 | O'Brien, Tom | 1897 | BLN | All BLN | 0 | 169 | -0.2 | 1 | 2 |
| obrit101 | O'Brien, Tom | 1898 | BLN | All BLN | 0 | 71 | -0.2 | 0 | 1 |