Jim Kaat had a record of 1-2 with an ERA of 3.78 and 8 strikeouts in 7 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. Kaat | 10/7/1965 | 1965 | World Series |  MIN | vs |  LAD | W | 1 | 1.00 | 3 | 1 | 0 | 0 | 9.0 | 7 | 1 | 1 | 0 | 1 | 1 | 0 | 0 | 36 | 0 |
| 2 | | J. Kaat | 10/11/1965 | 1965 | World Series | MIN | @ | LAD | L | 1 | 11.57 | 1 | 0 | 0 | 0 | 2.1 | 6 | 3 | 4 | 0 | 0 | 0 | 0 | 0 | 14 | 0 |
| 3 | | J. Kaat | 10/14/1965 | 1965 | World Series | MIN | vs | LAD | L | 1 | 6.00 | 2 | 0 | 0 | 0 | 3.0 | 5 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 15 | 0 |
| 4 |  | J. Kaat | 10/12/1982 | 1982 | World Series |  STL | vs |  MIL | 0 | 0.00 | 1 | 0 | 0 | 0 | 1.1 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 5 | 0 | |
| 5 | | J. Kaat | 10/13/1982 | 1982 | World Series | STL | vs | MIL | 0 | 0.00 | 0 | 0 | 0 | 0 | 0.2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | |
| 6 | | J. Kaat | 10/15/1982 | 1982 | World Series | STL | @ | MIL | 0 | 0.00 | 1 | 0 | 0 | 0 | 0.1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | |
| 7 | | J. Kaat | 10/16/1982 | 1982 | World Series | STL | @ | MIL | 0 | 0 | 0 | 0 | 0 | 0.0 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 1 | 2 | 1 | ||
| Total | 3 | 3.78 | 8 | 1 | 0 | 0 | 16.2 | 22 | 7 | 8 | 1 | 4 | 1 | 0 | 1 | 77 | 1 |
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