| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| -098- | -1.41 | 135.3 | 4.32 | 19 | 4 | MIN |
| Date | Rank | WAA | TeamID |
|---|---|---|---|
| 19800513 | XXXXX | -0.87 | MIN |
| 19800527 | -050- | -1.32 | MIN |
| 19800610 | XXXXX | -0.39 | MIN |
| 19800624 | XXXXX | -0.51 | MIN |
| 19800711 | -089- | -1.38 | MIN |
| 19800719 | -098- | -1.41 | MIN |
| 19800728 | -028- | -2.85 | MIN |
| 19800811 | -079- | -1.78 | MIN |
| 19800825 | -048- | -2.68 | MIN |
| 19800908 | -055- | -2.52 | MIN |
| 19800922 | -127- | -1.66 | MIN |
| 19801006 | XXXXX | -1.16 | MIN |
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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