| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| -031- | -1.88 | 88.7 | 4.47 | 13 | 4 | MIN |
| Date | Rank | WAA | TeamID |
|---|---|---|---|
| 19810512 | -015- | -1.58 | MIN |
| 19810526 | -024- | -1.55 | MIN |
| 19810609 | -054- | -1.29 | MIN |
| 19810821 | -029- | -1.91 | MIN |
| 19810824 | -031- | -1.88 | MIN |
| 19810907 | -071- | -1.42 | CHA |
| 19810921 | XXXXX | -1.18 | CHA |
| 19811005 | XXXXX | -1.12 | CHA |
Jerry Koosman Post Season Games
| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| XXXXX | -0.18 | 0.3 | 27 | 0 | 1 | CHA |
| XXXXX | 0.2 | 40 | 3.38 | 6 | 0 | NYN |
| XXXXX | 0.02 | 40.3 | 3.57 | 0 | 0 | TOT |
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