| Boston Red Sox - Pitching - ESPN Player Rating | ||||||||||||||
| RK | PLAYER | TEAM | IP | W | L | SV | BS | K | BB | HBP | BAA | HR | ERA | RAT |
| 1 | Aroldis Chapman | BOS | 13.0 | 0 | 1 | 9 | 0 | 19 | 5 | 1 | .152 | 0 | 0.66 | 30.8 |
| 2 | Ranger Suarez | BOS | 44.0 | 2 | 2 | 0 | 0 | 40 | 11 | 0 | .197 | 3 | 2.44 | 25.2 |
| 3 | Sonny Gray | BOS | 34.0 | 4 | 1 | 0 | 0 | 21 | 8 | 1 | .238 | 4 | 3.18 | 11.6 |
| 4 | Connelly Early | BOS | 42.0 | 3 | 2 | 0 | 0 | 39 | 18 | 4 | .221 | 5 | 3.16 | 6.3 |
| 5 | Tyler Samaniego | BOS | 15.0 | 0 | 1 | 0 | 0 | 12 | 7 | 1 | .192 | 1 | 1.17 | 4.5 |
| 6 | Jovani Moran | BOS | 22.0 | 0 | 1 | 0 | 1 | 22 | 14 | 1 | .177 | 4 | 3.18 | 1.2 |
| 7 | Ryan Watson | BOS | 24.0 | 0 | 0 | 0 | 0 | 19 | 9 | 2 | .297 | 5 | 6.20 | 0.6 |