Jerry Koosman was 3-0 with an ERA of 2.39 and 17 strikeouts in 4 appearances in the World Series in his career.
| NAME | DATE | SEASON | SERIES | TM | OPP | DEC | GS | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | J. Koosman | 10/12/1969 | 1969 | World Series |  NYM | @ |  BAL | W | 1 | 1.04 | 4 | 0 | 0 | 0 | 8.2 | 2 | 1 | 1 | 0 | 3 | 0 | 0 | 0 | 31 | 0 |
| 2 | | J. Koosman | 10/16/1969 | 1969 | World Series | NYM | vs | BAL | W | 1 | 3.00 | 5 | 1 | 0 | 0 | 9.0 | 5 | 3 | 3 | 2 | 1 | 0 | 0 | 0 | 33 | 0 |
| 3 | | J. Koosman | 10/14/1973 | 1973 | World Series | NYM | @ |  OAK | 1 | 11.57 | 4 | 0 | 0 | 0 | 2.1 | 6 | 3 | 3 | 0 | 3 | 0 | 0 | 1 | 16 | 0 | |
| 4 | | J. Koosman | 10/18/1973 | 1973 | World Series | NYM | vs | OAK | W | 1 | 0.00 | 4 | 0 | 0 | 0 | 6.1 | 3 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 25 | 0 |
| Total | 4 | 2.39 | 17 | 1 | 0 | 0 | 26.1 | 16 | 7 | 7 | 2 | 11 | 0 | 0 | 1 | 105 | 0 |
Some of the information used here was obtained free of charge from Retrosheet.
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