| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| +021+ | 2.03 | 57.3 | 2.04 | 7 | 0 | NYN |
| Date | Rank | WAA | TeamID |
|---|---|---|---|
| 19730510 | +016+ | 2.10 | NYN |
| 19730521 | +021+ | 2.03 | NYN |
| 19730525 | +057+ | 1.39 | NYN |
| 19730608 | +051+ | 1.68 | NYN |
| 19730622 | +021+ | 2.78 | NYN |
| 19730706 | +045+ | 2.44 | NYN |
| 19730720 | XXXXX | 0.99 | NYN |
| 19730806 | +131+ | 1.44 | NYN |
| 19730820 | +121+ | 1.67 | NYN |
| 19730903 | +041+ | 3.95 | NYN |
| 19730917 | +066+ | 3.38 | NYN |
| 19731001 | +029+ | 5.18 | NYN |
Jerry Koosman Post Season Games
| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| XXXXX | -0.18 | 0.3 | 27 | 0 | 1 | CHA |
| XXXXX | 0.21 | 40 | 3.38 | 6 | 0 | NYN |
| XXXXX | 0.03 | 40.3 | 3.57 | 0 | 0 | TOT |
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