| ERA* Wins Losses Saves Games Games Started Complete Games Shutouts Innings Pitched Hits Allowed Homeruns Allowed Strikeouts Walks Allowed |
| Boston Wins - Single Season Leaders |
| Rank | Player | Year | Value |
| 1 | Guy Hecker | 2016 | 11 |
| Pud Galvin | 2017 | 11 | |
| Orval Overall | 2017 | 11 | |
| Spud Chandler | 2016 | 11 | |
| 2 | Orval Overall | 2016 | 10 |
| 3 | Jack Coombs | 2017 | 9 |
| 4 | Earl Moore | 2017 | 8 |
| 5 | Guy Hecker | 2017 | 7 |
| 6 | Dolf Luque | 2016 | 6 |
| Earl Moore | 2016 | 6 | |
| 7 | Herb Score | 2017 | 4 |
| John Clarkson | 2016 | 4 | |
| 8 | Billy Pierce | 2017 | 2 |
| Dolf Luque | 2017 | 2 | |
| 9 | Harry Byrd | 2017 | 1 |
| Pud Galvin | 2016 | 1 |