| NAME | GS | SEASON | TM | G | W | L | W% | 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 |  | G. Kirby | 25 | 2022 |  SEA | 25 | 8 | 5 | .615 | 3.39 | 133 | 0 | 0 | 0 | 130.0 | 135 | 49 | 54 | 13 | 22 | 5 | 0 | 0 | 542 | 4 | 9.21 | 1.52 | 6.05 | 0.90 | 24.5 | 4.1 | 1.21 | .331 | 3.74 | 91 | 2.98 | 78 | 9.35 | 12.3 |
| 2 | | G. Kirby | 31 | 2023 | SEA | 31 | 12 | 10 | .545 | 3.35 | 172 | 1 | 0 | 0 | 190.2 | 179 | 71 | 74 | 22 | 19 | 6 | 0 | 1 | 757 | 1 | 8.12 | 0.90 | 9.05 | 1.04 | 22.7 | 2.5 | 1.04 | .292 | 3.49 | 83 | 3.34 | 81 | 8.45 | 16.7 |
| 3 | | G. Kirby | 33 | 2024 | SEA | 33 | 14 | 11 | .560 | 3.53 | 179 | 0 | 0 | 0 | 191.0 | 181 | 75 | 82 | 22 | 23 | 7 | 0 | 0 | 778 | 5 | 8.43 | 1.08 | 7.78 | 1.04 | 23.0 | 3.0 | 1.07 | .291 | 3.86 | 94 | 3.25 | 83 | 8.53 | 14.5 |
| 4 | | G. Kirby | 15 | 2025 | SEA | 15 | 8 | 5 | .615 | 3.71 | 90 | 0 | 0 | 0 | 85.0 | 71 | 35 | 35 | 9 | 20 | 4 | 0 | 0 | 342 | 2 | 9.53 | 2.12 | 4.50 | 0.95 | 26.3 | 5.8 | 1.07 | .283 | 3.71 | 97 | 3.21 | 80 | 7.52 | 7.6 |
| Total | 104 | 104 | 42 | 31 | .575 | 3.47 | 574 | 1 | 0 | 0 | 596.2 | 566 | 230 | 245 | 66 | 84 | 22 | 0 | 1 | 2,419 | 12 | 8.66 | 1.27 | 6.83 | 1.00 | 23.7 | 3.5 | 1.09 | .299 | 3.70 | 90 | 3.22 | 81 | 8.54 | 51 |
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