| Retro ID | Player | Year | Team | History | Is Pitcher? | PA or IP | WAR | Wins | Losses |
|---|---|---|---|---|---|---|---|---|---|
| obrij104 | O'Brien, John | 1899 | BLN | All BLN | 0 | 152 | -0.1 | 1 | 2 |
| obrij104 | O'Brien, John | 1899 | PIT | All PIT | 0 | 302 | -0.5 | 1 | 4 |
| obrij104 | O'Brien, John | 1897 | WSN | All WSN | 0 | 350 | -0.5 | 1 | 5 |
| obrij104 | O'Brien, John | 1896 | LS3 | All LS3 | 0 | 200 | 0.7 | 2 | 2 |
| obrij104 | O'Brien, John | 1896 | WSN | All WSN | 0 | 302 | 0.2 | 2 | 3 |
| obrij104 | O'Brien, John | 1895 | LS3 | All LS3 | 0 | 594 | -1 | 3 | 8 |
| obrij104 | O'Brien, John | 1893 | CHN | All CHN | 0 | 17 | 0.1 | 0 | 0 |
| obrij104 | O'Brien, John | 1891 | BRO | All BRO | 0 | 182 | -0.5 | 0 | 3 |