Jerry Koosman - Career Pitching
| Year | Team | W | L | W-L% | ERA | G | GS | GF | CG | SH | SV | SV% | IP | BB | SO | BR/9 | HR/9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1974 | SSL | 8 | 13 | .381 | 4.74 | 25 | 25 | 0 | 8 | 0 | 0 | 0.0% | 182.1 | 69 | 126 | 15.15 | 0.94 |
| 1977 | MNL | 16 | 10 | .615 | 2.62 | 30 | 30 | 0 | 8 | 2 | 0 | 0.0% | 227.0 | 69 | 190 | 10.51 | 0.95 |
| CAREER | 24 | 23 | .511 | 3.56 | 55 | 55 | 0 | 16 | 2 | 0 | 0.0% | 409.1 | 138 | 316 | 12.58 | 0.95 | |