George Kirby has played 5 seasons for the Mariners. He has 53 wins, 45 losses, an ERA of 3.74 and 769 strikeouts.
| 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 |  | G. Kirby | 2022 | 25 | 8 | 5 | .615 | 25 | 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 | 2023 | 31 | 12 | 10 | .545 | 31 | 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 | 2024 | 33 | 14 | 11 | .560 | 33 | 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 | 2025 | 23 | 10 | 8 | .556 | 23 | 4.21 | 137 | 0 | 0 | 0 | 126.0 | 121 | 59 | 60 | 15 | 29 | 7 | 0 | 0 | 524 | 3 | 9.79 | 2.07 | 4.72 | 1.07 | 26.1 | 5.5 | 1.19 | .315 | 4.29 | 111 | 3.36 | 84 | 8.64 | 9.2 | |
| 5 | | G. Kirby | 2026 | 30 | 9 | 11 | .450 | 30 | 4.33 | 148 | 1 | 0 | 0 | 174.2 | 197 | 84 | 89 | 22 | 47 | 3 | 0 | 1 | 741 | 1 | 7.63 | 2.42 | 3.15 | 1.13 | 20.0 | 6.3 | 1.40 | .336 | 4.59 | 113 | 3.89 | 98 | 10.15 | 1.2 | |
| Total | 142 | 53 | 45 | .541 | 142 | 3.74 | 769 | 2 | 0 | 0 | 812.1 | 813 | 338 | 359 | 94 | 140 | 28 | 0 | 2 | 3,342 | 14 | 8.52 | 1.55 | 5.49 | 1.04 | 23.0 | 4.2 | 1.17 | .311 | 3.98 | 98 | 3.38 | 85 | 9.01 | 53.8 |
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| NL East | W | L | PCT | GB |
|---|---|---|---|---|
 Braves - y | 93 | 65 | .589 | |
87 | 71 | .551 | 6.0 | |
78 | 80 | .494 | 15.0 | |
75 | 84 | .472 | 18.5 | |
73 | 85 | .462 | 20.0 | |
| NL Central | W | L | PCT | GB |
 Brewers - y | 99 | 59 | .627 | |
87 | 71 | .551 | 12.0 | |
80 | 78 | .506 | 19.0 | |
77 | 81 | .487 | 22.0 | |
73 | 85 | .462 | 26.0 | |
| NL West | W | L | PCT | GB |
 Dodgers - y | 97 | 61 | .614 | |
88 | 70 | .557 | 9.0 | |
84 | 74 | .532 | 13.0 | |
65 | 94 | .409 | 32.5 | |
57 | 101 | .361 | 40.0 |
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