Nathan Eovaldi has a 26-18 record with an ERA of 4.05 and 468 strikeouts in 96 appearances for the Red Sox 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 |  | N. Eovaldi | 2018 |  BOS | 12 | 3 | 3 | .500 | 11 | 3.33 | 48 | 0 | 0 | 0 | 54.0 | 57 | 20 | 28 | 3 | 12 | 2 | 0 | 0 | 231 | 3 | 8.00 | 2.00 | 4.00 | 0.50 | 20.8 | 5.2 | 1.28 | .325 | 4.67 | 75 | 2.88 | 69 | 9.50 | 7.9 |
| 2 | | N. Eovaldi | 2019 | BOS | 23 | 2 | 1 | .667 | 12 | 5.99 | 70 | 0 | 0 | 0 | 67.2 | 72 | 45 | 46 | 16 | 35 | 3 | 2 | 0 | 302 | 6 | 9.31 | 4.66 | 2.00 | 2.13 | 23.2 | 11.6 | 1.58 | .315 | 6.12 | 124 | 5.89 | 130 | 9.58 | -10.5 |
| 3 | | N. Eovaldi | 2020 | BOS | 9 | 4 | 2 | .667 | 9 | 3.72 | 52 | 0 | 0 | 0 | 48.1 | 51 | 20 | 20 | 8 | 7 | 4 | 0 | 0 | 199 | 2 | 9.68 | 1.30 | 7.43 | 1.49 | 26.1 | 3.5 | 1.20 | .336 | 3.72 | 79 | 3.86 | 87 | 9.50 | 3.1 |
| 4 | | N. Eovaldi | 2021 | BOS | 32 | 11 | 9 | .550 | 32 | 3.75 | 195 | 0 | 0 | 0 | 182.1 | 182 | 76 | 81 | 15 | 35 | 7 | 0 | 2 | 764 | 6 | 9.63 | 1.73 | 5.57 | 0.74 | 25.5 | 4.6 | 1.19 | .326 | 4.00 | 82 | 2.78 | 64 | 8.98 | 30.9 |
| 5 | | N. Eovaldi | 2022 | BOS | 20 | 6 | 3 | .667 | 20 | 3.87 | 103 | 2 | 1 | 0 | 109.1 | 115 | 47 | 55 | 21 | 20 | 1 | 0 | 0 | 460 | 2 | 8.48 | 1.65 | 5.15 | 1.73 | 22.4 | 4.3 | 1.23 | .298 | 4.53 | 94 | 4.30 | 108 | 9.47 | -3.8 |
| Total | 96 | 26 | 18 | .591 | 84 | 4.05 | 468 | 2 | 1 | 0 | 461.2 | 477 | 208 | 230 | 63 | 109 | 17 | 2 | 2 | 1,956 | 19 | 9.12 | 2.12 | 4.29 | 1.23 | 23.9 | 5.6 | 1.27 | .319 | 4.48 | 90 | 3.72 | 87 | 9.30 | 27.6 |
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