| 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 | 19.0 | 0 | 1 | 13 | 0 | 26 | 9 | 1 | .134 | 0 | 0.46 | 38.1 |
| 2 | Payton Tolle | BOS | 47.0 | 3 | 2 | 0 | 0 | 51 | 13 | 1 | .192 | 3 | 2.28 | 26.1 |
| 3 | Sonny Gray | BOS | 56.0 | 7 | 1 | 0 | 0 | 44 | 16 | 3 | .252 | 6 | 3.20 | 20.4 |
| 4 | Connelly Early | BOS | 66.0 | 5 | 3 | 0 | 0 | 63 | 23 | 5 | .224 | 11 | 3.26 | 13.5 |
| 5 | Ranger Suarez | BOS | 58.0 | 2 | 3 | 0 | 0 | 57 | 19 | 2 | .227 | 4 | 3.38 | 5.1 |
| 6 | Jovani Moran | BOS | 33.0 | 1 | 2 | 0 | 1 | 38 | 15 | 1 | .172 | 5 | 3.00 | 4.5 |
| 7 | Garrett Whitlock | BOS | 19.0 | 3 | 1 | 0 | 1 | 25 | 6 | 0 | .216 | 2 | 3.20 | 2.1 |
| 8 | Ryan Watson | BOS | 36.0 | 0 | 0 | 1 | 0 | 31 | 16 | 2 | .259 | 6 | 5.15 | 1.1 |