Interpreted as:
best single season era with a minimum of 0.5 IP per team game by a pitcher ever red sox pre 2024| NAME | ERA | G | W | L | W% | GS | 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 |  | T. Houck | 3.12 | 30 | 9 | 10 | .474 | 30 | 154 | 1 | 1 | 0 | 178.2 | 156 | 62 | 75 | 11 | 48 | 16 | 0 | 1 | 743 | 2 | 7.76 | 2.42 | 3.21 | 0.55 | 20.7 | 6.5 | 1.14 | .282 | 3.78 | 73 | 3.31 | 80 | 7.86 | 16.1 |
| 2 | | C. Criswell | 4.08 | 26 | 6 | 5 | .545 | 18 | 73 | 0 | 0 | 0 | 99.1 | 103 | 45 | 52 | 10 | 31 | 7 | 4 | 0 | 424 | 2 | 6.61 | 2.81 | 2.35 | 0.91 | 17.2 | 7.3 | 1.35 | .307 | 4.71 | 96 | 4.15 | 100 | 9.33 | -0.2 |
| 3 | | N. Pivetta | 4.14 | 27 | 6 | 12 | .333 | 26 | 172 | 0 | 0 | 0 | 145.2 | 128 | 67 | 70 | 28 | 36 | 1 | 0 | 1 | 595 | 4 | 10.63 | 2.22 | 4.78 | 1.73 | 28.9 | 6.1 | 1.13 | .279 | 4.32 | 97 | 4.06 | 98 | 7.91 | 1.2 |
| 4 | | K. Crawford | 4.36 | 33 | 9 | 16 | .360 | 33 | 175 | 0 | 0 | 0 | 183.2 | 155 | 89 | 97 | 34 | 51 | 9 | 0 | 0 | 759 | 4 | 8.58 | 2.50 | 3.43 | 1.67 | 23.1 | 6.7 | 1.12 | .247 | 4.75 | 103 | 4.64 | 112 | 7.60 | -10.3 |
| 5 | | B. Bello | 4.49 | 30 | 14 | 8 | .636 | 30 | 153 | 0 | 0 | 0 | 162.1 | 157 | 81 | 84 | 19 | 64 | 11 | 0 | 0 | 702 | 6 | 8.48 | 3.55 | 2.39 | 1.05 | 21.8 | 9.1 | 1.36 | .303 | 4.66 | 106 | 4.18 | 101 | 8.70 | -0.9 |
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