| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 16.35 | 193109240_BOS_OAK |
| Lefty Gomez | NYA | 3.54 | 193109230_MIN_NYA |
| Heinie Meine | PIT | 2.86 | 193109220_PHI_PIT |
| Lloyd Brown | MIN | 2.11 | 193109230_MIN_NYA |
| Paul Derringer | SLN | 0.38 | 193109220_LAN_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Stew Bolen | PHI | -2.97 | 193109220_PHI_PIT |
| George Blaeholder | BAL | -1.2 | 193109220_BAL_BOS |
| Clint Brown | CLE | -1.15 | 193109232_CLE_DET |
| Carl Fischer | MIN | -0.46 | 193109220_CHA_MIN |
| Milt Gaston | BOS | -0.44 | 193109220_BAL_BOS |
Based on accumulated WAA for this season up to 1931-09-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 14.36 | Lefty Grove | 285.7 | OAK |
| +006+ | 10.27 | Bill Walker | 239.3 | SFN |
| +010+ | 8.27 | Carl Hubbell | 247 | SFN |
| +012+ | 7.82 | Freddie Fitzsimmons | 251 | SFN |
| +016+ | 6.95 | Lefty Gomez | 233.3 | NYA |
| +017+ | 6.93 | Heinie Meine | 275 | PIT |
| +018+ | 6.81 | Ed Brandt | 249.7 | ATL |
| +022+ | 5.61 | Lloyd Brown | 255.7 | MIN |
| +025+ | 5.13 | Larry French | 276 | PIT |
| +026+ | 4.96 | Ray Benge | 238 | PHI |
| +028+ | 4.7 | Watty Clark | 224.3 | LAN |
| +030+ | 4.54 | Bill Hallahan | 239.7 | SLN |
| +031+ | 4.42 | Syl Johnson | 176.7 | SLN |
| +035+ | 4.3 | Bob Smith | 235.3 | CHN |
| +039+ | 4.03 | Firpo Marberry | 216.7 | MIN |
| +040+ | 4.02 | Ray Kremer | 231 | PIT |
| +041+ | 3.94 | Larry Benton | 194.7 | CIN |
| +042+ | 3.92 | Bump Hadley | 175.3 | MIN |
| +044+ | 3.76 | George Earnshaw | 278 | OAK |
| +046+ | 3.74 | Dazzy Vance | 218.7 | LAN |
| +050+ | 3.49 | Jim Mooney | 71.7 | SFN |
| +049+ | 3.49 | Red Lucas | 228.7 | CIN |
| +051+ | 3.39 | Glenn Spencer | 180 | PIT |
| +055+ | 3.18 | Charlie Root | 245.7 | CHN |
| +059+ | 2.81 | Paul Derringer | 201.7 | SLN |
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