Bob Welch had a record of 0-1 with an ERA of 5.40, 16 strikeouts and 1 save 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 |  | B. Welch | 10/11/1978 | 1978 | World Series |  LAD | vs |  NYY | 0 | 0.00 | 1 | 0 | 0 | 1 | 0.2 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | |
| 2 | | B. Welch | 10/14/1978 | 1978 | World Series | LAD | @ | NYY | L | 0 | 3.86 | 3 | 0 | 0 | 0 | 2.1 | 2 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 10 | 0 |
| 3 | | B. Welch | 10/17/1978 | 1978 | World Series | LAD | vs | NYY | 0 | 13.50 | 2 | 0 | 0 | 0 | 1.1 | 2 | 2 | 2 | 1 | 1 | 0 | 0 | 0 | 7 | 0 | |
| 4 | | B. Welch | 10/24/1981 | 1981 | World Series | LAD | vs | NYY | 1 | 0 | 0 | 0 | 0 | 0.0 | 3 | 2 | 2 | 0 | 1 | 0 | 0 | 0 | 4 | 0 | ||
| 5 |  | B. Welch | 10/18/1988 | 1988 | World Series |  OAK | vs | LAD | 1 | 1.80 | 8 | 0 | 0 | 0 | 5.0 | 6 | 1 | 1 | 0 | 3 | 0 | 0 | 0 | 24 | 0 | |
| 6 | | B. Welch | 10/17/1990 | 1990 | World Series | OAK | @ |  CIN | 1 | 4.91 | 2 | 0 | 0 | 0 | 7.1 | 9 | 4 | 4 | 0 | 2 | 0 | 0 | 0 | 31 | 0 | |
| Total | 3 | 5.40 | 16 | 0 | 0 | 1 | 16.2 | 22 | 10 | 10 | 1 | 8 | 0 | 2 | 0 | 78 | 0 |
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