| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 13.47 | 193109041_OAK_BOS |
| Bill Walker | SFN | 6.84 | 193109040_LAN_SFN |
| Ed Brandt | ATL | 6.07 | 193109040_ATL_PHI |
| Larry French | PIT | 2.25 | 193109030_SLN_PIT |
| Bill Hallahan | SLN | 2.09 | 193109040_SLN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Pat Caraway | CHA | -7.94 | 193109050_DET_CHA |
| Jack Russell | BOS | -2.08 | 193109042_OAK_BOS |
| Tommy Bridges | DET | -1.67 | 193109050_DET_CHA |
| Hank Johnson | NYA | -1.67 | 193109040_NYA_MIN |
| Waite Hoyt | OAK | -1.2 | 193109042_OAK_BOS |
Based on accumulated WAA for this season up to 1931-09-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 12.36 | Lefty Grove | 249.7 | OAK |
| +006+ | 9.49 | Bill Walker | 216 | SFN |
| +009+ | 7.84 | Carl Hubbell | 220.7 | SFN |
| +012+ | 7.31 | Ed Brandt | 222.7 | ATL |
| +013+ | 7.09 | Freddie Fitzsimmons | 234.7 | SFN |
| +017+ | 5.5 | Ray Kremer | 225.3 | PIT |
| +018+ | 5.34 | Bill Hallahan | 207.3 | SLN |
| +019+ | 5.33 | Lefty Gomez | 204.3 | NYA |
| +021+ | 5.01 | Tom Zachary | 194.3 | ATL |
| +023+ | 4.81 | Ray Benge | 219.3 | PHI |
| +025+ | 4.7 | George Earnshaw | 253 | OAK |
| +027+ | 4.54 | Heinie Meine | 235 | PIT |
| +028+ | 4.49 | Larry French | 241 | PIT |
| +031+ | 4 | Watty Clark | 190.7 | LAN |
| +032+ | 3.91 | Si Johnson | 237.7 | CIN |
| +035+ | 3.87 | Lloyd Brown | 222 | MIN |
| +038+ | 3.8 | Charlie Root | 217.7 | CHN |
| +040+ | 3.66 | Jim Mooney | 46.7 | SFN |
| +043+ | 3.25 | Glenn Spencer | 151.7 | PIT |
| +044+ | 3.21 | Jesse Haines | 122.3 | SLN |
| +045+ | 3.12 | Bob Smith | 206.3 | CHN |
| +046+ | 3.09 | Dazzy Vance | 198.7 | LAN |
| +048+ | 3 | Firpo Marberry | 182.3 | MIN |
| +053+ | 2.65 | Syl Johnson | 155.7 | SLN |
| +056+ | 2.56 | Fred Heimach | 117.3 | LAN |
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