| Year | Team | W | L | G | IP | ERA | WHIP | K | BB | HR | K/9 | BB/9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2013 | Los Angeles Angels | 0 | 0 | 7 | 9.0 | 2.00 | 1.22 | 7 | 4 | 1 | 7.00 | 4.00 |
| 2018 | Boston Red Sox |
| 2 |
| 0 |
| 34 |
| 33.2 |
| 1.60 |
| 0.77 |
| 29 |
| 7 |
| 2 |
| 7.75 |
| 1.87 |
| 2019 | Boston Red Sox | 2 | 4 | 62 | 55.2 | 4.85 | 1.29 | 61 | 21 | 9 | 9.86 | 3.40 |
| 2020 | Boston Red Sox | 1 | 0 | 25 | 25.0 | 3.96 | 1.40 | 30 | 11 | 2 | 10.80 | 3.96 |
| 2021 | Boston Red Sox | 1 | 1 | 13 | 12.0 | 1.50 | 1.33 | 9 | 4 | 2 | 6.75 | 3.00 |
| 2022 | Boston Red Sox | 0 | 3 | 68 | 62.1 | 5.78 | 1.30 | 64 | 13 | 9 | 9.24 | 1.88 |
| 2023 | Boston Red Sox | 1 | 0 | 20 | 21.0 | 7.29 | 1.57 | 18 | 9 | 2 | 7.71 | 3.86 |
| 2023 | Los Angeles Dodgers | 2 | 0 | 39 | 38.2 | 0.70 | 0.72 | 38 | 10 | 1 | 8.84 | 2.33 |
| 2023 | 2 teams | 3 | 0 | 59 | 59.2 | 3.02 | 1.02 | 56 | 19 | 3 | 8.45 | 2.87 |
| 2024 | Los Angeles Dodgers | 1 | 0 | 29 | 28.0 | 3.54 | 0.96 | 25 | 5 | 3 | 8.04 | 1.61 |
| 2025 | Chicago Cubs | 0 | 1 | 28 | 26.0 | 4.50 | 1.23 | 20 | 5 | 2 | 6.92 | 1.73 |
| Career | — | 10 | 9 | 325 | 311.1 | 3.90 | 1.16 | 301 | 89 | 33 | 8.70 | 2.57 |
