| 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 | 7.0 | 0 | 1 | 4 | 0 | 8 | 3 | 1 | .192 | 0 | 1.17 | 15.6 |
| 2 | Jovani Moran | BOS | 13.0 | 0 | 0 | 0 | 1 | 15 | 8 | 0 | .130 | 1 | 2.03 | 7.8 |
| 3 | Connelly Early | BOS | 25.0 | 1 | 1 | 0 | 0 | 24 | 13 | 3 | .222 | 2 | 2.88 | 6.0 |
| 4 | Sonny Gray | BOS | 23.0 | 2 | 1 | 0 | 0 | 13 | 5 | 1 | .269 | 3 | 4.30 | 3.3 |
| 5 | Zack Kelly | BOS | 9.0 | 0 | 1 | 0 | 1 | 6 | 1 | 0 | .194 | 1 | 4.00 | 3.2 |
| 6 | Garrett Whitlock | BOS | 9.0 | 2 | 1 | 0 | 0 | 12 | 5 | 0 | .156 | 1 | 2.00 | 2.1 |
| 7 | Ryan Watson | BOS | 14.0 | 0 | 0 | 0 | 0 | 8 | 7 | 1 | .293 | 3 | 7.71 | 0.3 |
| 8 | Jack Anderson | BOS | 8.0 | 0 | 0 | 0 | 0 | 6 | 2 | 0 | .267 | 1 | 3.38 | 0.3 |