| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Hubbell | SFN | 6.05 | 193109161_SFN_CIN |
| Larry French | PIT | 2.5 | 193109152_LAN_PIT |
| Bill Hallahan | SLN | 2.32 | 193109160_PHI_SLN |
| Lloyd Brown | MIN | 1.41 | 193109150_BAL_MIN |
| George Earnshaw | OAK | 1.33 | 193109160_CLE_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Waite Hoyt | OAK | -2.01 | 193109142_CLE_OAK |
| Tommy Thomas | CHA | -1.28 | 193109140_CHA_BOS |
| Ownie Carroll | CIN | -1.02 | 193109162_SFN_CIN |
| Hod Lisenbee | BOS | -0.99 | 193109140_CHA_BOS |
| Sheriff Blake | PHI | -0.79 | 193109142_PHI_SLN |
Based on accumulated WAA for this season up to 1931-09-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 13.42 | Lefty Grove | 267.7 | OAK |
| +005+ | 9.92 | Bill Walker | 230.3 | SFN |
| +008+ | 9.17 | Carl Hubbell | 246.7 | SFN |
| +011+ | 7.63 | Freddie Fitzsimmons | 243.7 | SFN |
| +016+ | 6.46 | Larry French | 268 | PIT |
| +017+ | 6.4 | Ed Brandt | 240.7 | ATL |
| +019+ | 6.27 | Bill Hallahan | 234.3 | SLN |
| +020+ | 5.94 | Lefty Gomez | 217.3 | NYA |
| +022+ | 5.65 | Heinie Meine | 253 | PIT |
| +024+ | 5.29 | Tom Zachary | 209.3 | ATL |
| +026+ | 4.95 | Lloyd Brown | 239.7 | MIN |
| +029+ | 4.42 | Bob Smith | 224.3 | CHN |
| +032+ | 4.24 | Syl Johnson | 173.7 | SLN |
| +033+ | 4.19 | Ray Kremer | 231 | PIT |
| +034+ | 4.17 | George Earnshaw | 272 | OAK |
| +035+ | 4.16 | Watty Clark | 215.3 | LAN |
| +036+ | 4.12 | Ray Benge | 227.3 | PHI |
| +038+ | 4.11 | Dazzy Vance | 212.7 | LAN |
| +043+ | 3.6 | Si Johnson | 251.7 | CIN |
| +044+ | 3.55 | Bump Hadley | 165.3 | MIN |
| +046+ | 3.49 | Jim Mooney | 62.7 | SFN |
| +048+ | 3.45 | Firpo Marberry | 199.7 | MIN |
| +049+ | 3.31 | Glenn Spencer | 169 | PIT |
| +053+ | 3.18 | Red Lucas | 219.7 | CIN |
| +052+ | 3.18 | Larry Benton | 185.7 | CIN |
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