| Retro ID | Player | Year | Team | History | Is Pitcher? | PA or IP | WAR | Wins | Losses |
|---|---|---|---|---|---|---|---|---|---|
| willm004 | Williamson, Mark | 1988 | BAL | All BAL | 1 | 118 | -0.2 | 1 | 4 |
| willm004 | Williamson, Mark | 1993 | BAL | All BAL | 1 | 88 | -0.7 | 0 | 3 |
| willm004 | Williamson, Mark | 1991 | BAL | All BAL | 1 | 80 | -0.3 | 1 | 3 |
| willm004 | Williamson, Mark | 1987 | BAL | All BAL | 1 | 125 | 1.5 | 4 | 3 |
| willm004 | Williamson, Mark | 1989 | BAL | All BAL | 1 | 107 | 2 | 4 | 2 |
| willm004 | Williamson, Mark | 1990 | BAL | All BAL | 1 | 85 | 1.9 | 3 | 1 |
| willm004 | Williamson, Mark | 1994 | BAL | All BAL | 1 | 67 | 0.6 | 1 | 1 |
| willm004 | Williamson, Mark | 1992 | BAL | All BAL | 1 | 19 | 0.5 | 1 | 0 |