Mort Cooper had a 2-3 record with an ERA of 3.00 and 35 strikeouts in 6 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 |  | M. Cooper | 9/30/1942 | 1942 | World Series |  SLN | vs |  NYY | L | 1 | 3.52 | 7 | 0 | 0 | 0 | 7.2 | 10 | 3 | 5 | 0 | 3 | 0 | 0 | 0 | 36 | 0 |
| 2 | | M. Cooper | 10/4/1942 | 1942 | World Series | SLN | @ | NYY | 1 | 8.44 | 2 | 0 | 0 | 0 | 5.1 | 7 | 5 | 5 | 1 | 1 | 0 | 0 | 0 | 23 | 0 | |
| 3 | | M. Cooper | 10/6/1943 | 1943 | World Series | SLN | @ | NYY | W | 1 | 3.00 | 4 | 1 | 0 | 0 | 9.0 | 6 | 3 | 3 | 0 | 1 | 0 | 0 | 0 | 34 | 0 |
| 4 | | M. Cooper | 10/11/1943 | 1943 | World Series | SLN | vs | NYY | L | 1 | 2.57 | 6 | 0 | 0 | 0 | 7.0 | 5 | 2 | 2 | 1 | 2 | 0 | 0 | 0 | 28 | 1 |
| 5 | | M. Cooper | 10/4/1944 | 1944 | World Series | SLN | vs |  SLA | L | 1 | 2.57 | 4 | 0 | 0 | 0 | 7.0 | 2 | 2 | 2 | 1 | 3 | 0 | 0 | 0 | 26 | 0 |
| 6 | | M. Cooper | 10/8/1944 | 1944 | World Series | SLN | @ | SLA | W | 1 | 0.00 | 12 | 1 | 1 | 0 | 9.0 | 7 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 36 | 0 |
| Total | 6 | 3.00 | 35 | 2 | 1 | 0 | 45.0 | 37 | 15 | 17 | 3 | 12 | 0 | 0 | 0 | 183 | 1 |
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