| Year | Team | W | L | G | IP | ERA | WHIP | K | BB | HR | K/9 | BB/9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2020 | Boston Red Sox | 3 | 0 | 3 | 17.0 | 0.53 | 0.88 | 21 | 9 | 1 | 11.12 | 4.76 |
| 2021 |
| Boston Red Sox |
| 1 |
| 5 |
| 18 |
| 69.0 |
| 3.52 |
| 1.13 |
| 87 |
| 21 |
| 4 |
| 11.35 |
| 2.74 |
| 2022 | Boston Red Sox | 5 | 4 | 32 | 60.0 | 3.15 | 1.18 | 56 | 22 | 3 | 8.40 | 3.30 |
| 2023 | Boston Red Sox | 6 | 10 | 21 | 106.0 | 5.01 | 1.37 | 99 | 41 | 14 | 8.41 | 3.48 |
| 2024 | Boston Red Sox | 9 | 10 | 30 | 178.2 | 3.12 | 1.14 | 154 | 48 | 11 | 7.76 | 2.42 |
| 2025 | Boston Red Sox | 0 | 3 | 9 | 43.2 | 8.04 | 1.69 | 32 | 17 | 10 | 6.60 | 3.50 |
| Career | — | 24 | 32 | 113 | 474.1 | 3.97 | 1.24 | 449 | 158 | 43 | 8.52 | 3.00 |
