| Starter | Tm | Tier | Game |
|---|---|---|---|
| Freddie Fitzsimmons | SFN | 4.45 | 193107210_SFN_SLN |
| Watty Clark | LAN | 3.94 | 193107200_LAN_CHN |
| Tom Zachary | ATL | 3.68 | 193107220_ATL_CHN |
| Charlie Root | CHN | 2.64 | 193107200_LAN_CHN |
| Ray Kremer | PIT | 1.78 | 193107222_LAN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Vic Frazier | CHA | -1.87 | 193107210_CHA_OAK |
| Red Ruffing | NYA | -1.13 | 193107222_DET_NYA |
| Waite Hoyt | OAK | -0.89 | 193107210_CHA_OAK |
| Tommy Bridges | DET | -0.72 | 193107222_DET_NYA |
| Sam Gray | BAL | -0.63 | 193107220_BAL_MIN |
Based on accumulated WAA for this season up to 1931-07-22.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 8.75 | Lefty Grove | 178 | OAK |
| +012+ | 4.59 | Watty Clark | 127.7 | LAN |
| +014+ | 4.2 | Ed Brandt | 141.7 | ATL |
| +015+ | 4.16 | Lloyd Brown | 166.7 | MIN |
| +017+ | 4.05 | Ray Kremer | 160.3 | PIT |
| +018+ | 3.86 | Tom Zachary | 125.3 | ATL |
| +019+ | 3.82 | Ray Benge | 150.7 | PHI |
| +020+ | 3.66 | Charlie Root | 143.3 | CHN |
| +022+ | 3.63 | Freddie Fitzsimmons | 153.3 | SFN |
| +024+ | 3.56 | Bill Hallahan | 140.3 | SLN |
| +025+ | 3.53 | Carl Hubbell | 129 | SFN |
| +026+ | 3.5 | Bill Walker | 122.3 | SFN |
| +028+ | 3.43 | Dazzy Vance | 128.7 | LAN |
| +029+ | 3.41 | Heinie Meine | 158 | PIT |
| +031+ | 3.26 | Si Johnson | 159 | CIN |
| +034+ | 2.44 | Rube Walberg | 184.3 | OAK |
| +038+ | 2.35 | George Earnshaw | 192 | OAK |
| +039+ | 2.32 | Jack Ogden | 60.3 | CIN |
| +049+ | 1.95 | Lefty Gomez | 119.7 | NYA |
| +050+ | 1.94 | George Uhle | 127.3 | DET |
| +052+ | 1.91 | Jack Berly | 85 | SFN |
| +054+ | 1.9 | Red Lucas | 141.3 | CIN |
| +055+ | 1.85 | Bob Smith | 142 | CHN |
| +058+ | 1.81 | Firpo Marberry | 107.7 | MIN |
| +061+ | 1.75 | Bump Hadley | 98.3 | MIN |
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