| Retro ID | Player | Year | Team | History | Is Pitcher? | PA or IP | WAR | Wins | Losses |
|---|---|---|---|---|---|---|---|---|---|
| obrij103 | O'Brien, Jack | 1899 | WSN | All WSN | 0 | 502 | -0.1 | 3 | 6 |
| obrij103 | O'Brien, Jack | 1903 | BOS | All BOS | 0 | 362 | -0.5 | 2 | 5 |
| obrij103 | O'Brien, Jack | 1901 | CLE | All CLE | 0 | 401 | 0.4 | 3 | 4 |
| obrij103 | O'Brien, Jack | 1901 | WS1 | All WS1 | 0 | 49 | -0.4 | 0 | 1 |