| NAME | IP | SEASON | TM | G | W | L | W% | GS | ERA | SO | CG | SHO | SV | 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 |  | R. Helsley | 36.2 | 2019 |  STL | 24 | 2 | 0 | 1.000 | 0 | 2.95 | 32 | 0 | 0 | 0 | 34 | 12 | 13 | 5 | 12 | 0 | 4 | 2 | 153 | 2 | 7.85 | 2.95 | 2.67 | 1.23 | 20.9 | 7.8 | 1.25 | .279 | 3.19 | 71 | 4.21 | 98 | 8.35 | 0.3 |
| 2 | | R. Helsley | 12.0 | 2020 | STL | 12 | 1 | 1 | .500 | 0 | 5.25 | 10 | 0 | 0 | 1 | 8 | 7 | 8 | 3 | 8 | 1 | 4 | 1 | 52 | 0 | 7.50 | 6.00 | 1.25 | 2.25 | 19.2 | 15.4 | 1.33 | .167 | 6.00 | 122 | 7.02 | 163 | 6.00 | -3.7 |
| 3 | | R. Helsley | 47.1 | 2021 | STL | 51 | 6 | 4 | .600 | 0 | 4.56 | 47 | 0 | 0 | 1 | 40 | 24 | 24 | 4 | 27 | 0 | 7 | 2 | 206 | 7 | 8.94 | 5.13 | 1.74 | 0.76 | 22.8 | 13.1 | 1.42 | .281 | 4.56 | 112 | 3.99 | 96 | 7.61 | 0.9 |
| 4 | | R. Helsley | 64.2 | 2022 | STL | 54 | 9 | 1 | .900 | 0 | 1.25 | 94 | 0 | 0 | 19 | 28 | 9 | 11 | 6 | 20 | 0 | 33 | 1 | 239 | 1 | 13.08 | 2.78 | 4.70 | 0.84 | 39.3 | 8.4 | 0.74 | .185 | 1.53 | 32 | 2.33 | 60 | 3.90 | 11.5 |
| 5 | | R. Helsley | 36.2 | 2023 | STL | 33 | 3 | 4 | .429 | 0 | 2.45 | 52 | 0 | 0 | 14 | 22 | 10 | 11 | 1 | 17 | 1 | 25 | 1 | 146 | 3 | 12.76 | 4.17 | 3.06 | 0.25 | 35.6 | 11.6 | 1.06 | .280 | 2.70 | 57 | 2.24 | 52 | 5.40 | 8.5 |
| 6 | | R. Helsley | 66.1 | 2024 | STL | 65 | 7 | 4 | .636 | 0 | 2.04 | 79 | 0 | 0 | 49 | 50 | 15 | 19 | 3 | 23 | 0 | 62 | 3 | 266 | 1 | 10.72 | 3.12 | 3.43 | 0.41 | 29.7 | 8.6 | 1.10 | .292 | 2.58 | 50 | 2.41 | 61 | 6.78 | 11.8 |
| 7 | | R. Helsley | 56.0 | 2025 | TOT | 58 | 3 | 4 | .429 | 0 | 4.50 | 63 | 0 | 0 | 21 | 61 | 28 | 32 | 8 | 25 | 1 | 36 | 3 | 252 | 7 | 10.13 | 4.02 | 2.52 | 1.29 | 25.0 | 9.9 | 1.54 | .342 | 5.14 | 110 | 4.13 | 101 | 9.80 | -0.4 |
| Total | 319.2 | 297 | 31 | 18 | .633 | 0 | 2.96 | 377 | 0 | 0 | 105 | 243 | 105 | 118 | 30 | 132 | 3 | 171 | 13 | 1,314 | 21 | 10.61 | 3.72 | 2.86 | 0.84 | 28.7 | 10.0 | 1.17 | .276 | 3.32 | 72 | 3.29 | 80 | 6.84 | 28.7 |
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