| Rank | WAA | IP | ERA | Gs | Gr | Tm |
|---|---|---|---|---|---|---|
| +022+ | 6.87 | 227.0 | 2.30 | 30 | 0 | NYN |
| Date | Rank | WAA | TeamID |
|---|---|---|---|
| 19690512 | XXXXX | 0.00 | NYN |
| 19690527 | XXXXX | 0.15 | NYN |
| 19690610 | +053+ | 2.07 | NYN |
| 19690624 | +011+ | 4.24 | NYN |
| 19690708 | +017+ | 4.63 | NYN |
| 19690725 | +018+ | 5.11 | NYN |
| 19690808 | +013+ | 6.05 | NYN |
| 19690822 | +026+ | 5.44 | NYN |
| 19690905 | +043+ | 5.03 | NYN |
| 19690919 | +020+ | 6.73 | NYN |
| 19690921 | +022+ | 6.87 | NYN |
| 19691002 | +020+ | 7.22 | NYN |
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 |
_