| Starter | Tm | Tier | Game |
|---|---|---|---|
| George Winter | BOS | -3 | 190705210_BOS_CHA |
| Ed Willett | DET | -2.37 | 190705210_OAK_DET |
| Buster Brown | SLN | -1.82 | 190705200_SLN_SFN |
| Cy Falkenberg | MIN | -1.13 | 190705210_MIN_CLE |
| Earl Moore | NYA | -0.86 | 190705190_NYA_BAL |
Based on accumulated WAA for this season up to 1907-05-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.28 | Addie Joss | 74.7 | CLE |
| +002+ | 3.14 | Carl Lundgren | 50 | CHN |
| +003+ | 2.74 | Christy Mathewson | 59 | SFN |
| +004+ | 2.42 | Nick Altrock | 73 | CHA |
| +005+ | 2.36 | Cy Young | 71 | BOS |
| +006+ | 2.01 | Jack Pfiester | 43.7 | CHN |
| +008+ | 1.95 | Joe McGinnity | 65 | SFN |
| +011+ | 1.69 | Ed Walsh | 60.7 | CHA |
| +012+ | 1.61 | Mordecai Brown | 44 | CHN |
| +015+ | 1.47 | Glenn Liebhardt | 60 | CLE |
| +016+ | 1.46 | Ed Killian | 55 | DET |
| +018+ | 1.44 | Lefty Leifield | 64 | PIT |
| +019+ | 1.44 | George Bell | 54 | LAN |
| +021+ | 1.33 | Hooks Wiltse | 33 | SFN |
| XXXXX | 1.2 | Casey Patten | 53 | MIN |
| XXXXX | 1.16 | Ed Karger | 35 | SLN |
| XXXXX | 1.15 | Bob Ewing | 71 | CIN |
| XXXXX | 1.01 | Ralph Glaze | 33.3 | BOS |
| XXXXX | 0.96 | Fred Glade | 30 | BAL |
| XXXXX | 0.92 | Vic Willis | 55 | PIT |
| XXXXX | 0.87 | John Eubank | 17 | DET |
| XXXXX | 0.87 | Chick Fraser | 34.7 | CHN |
| XXXXX | 0.84 | Frank Smith | 55 | CHA |
| XXXXX | 0.8 | Harry Howell | 77.3 | BAL |
| XXXXX | 0.8 | Patsy Flaherty | 55 | ATL |
_