Justin Masterson was 1-0 with an ERA of 1.54 and 11 strikeouts in 10 appearances in the postseason in his career.
| NAME | SEASON | TM | G | W | L | W% | GS | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | ERA- | FIP | FIP- | H/9 | PRAA | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  | J. Masterson | 2008 |  BOS | 9 | 1 | 0 | 1.000 | 0 | 1.86 | 9 | 0 | 0 | 0 | 9.2 | 10 | 2 | 3 | 0 | 5 | 1 | 1 | 0 | 40 | 0 | 8.38 | 4.66 | 1.80 | 0.00 | 22.5 | 12.5 | 1.55 | .400 | 2.79 | 9.31 | ||||
| 2 |  | J. Masterson | 2013 |  CLE | 1 | 0 | 0 | 0 | 0.00 | 2 | 0 | 0 | 0 | 2.0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 7 | 0 | 9.00 | 0.00 | 0.00 | 28.6 | 0.0 | 0.50 | .250 | 0.00 | 4.50 | ||||||
| Total | 10 | 1 | 0 | 1.000 | 0 | 1.54 | 11 | 0 | 0 | 0 | 11.2 | 11 | 2 | 3 | 0 | 5 | 2 | 1 | 0 | 47 | 0 | 8.49 | 3.86 | 2.20 | 0.00 | 23.4 | 10.6 | 1.37 | .379 | 2.31 | 8.49 |
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