| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Walker | SFN | 6.83 | 193109170_SFN_SLN |
| Lefty Gomez | NYA | 2.76 | 193109172_BAL_NYA |
| Larry French | PIT | 2.5 | 193109152_LAN_PIT |
| Bill Hallahan | SLN | 2.32 | 193109160_PHI_SLN |
| Tom Zachary | ATL | 1.85 | 193109171_ATL_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ownie Carroll | CIN | -1.02 | 193109162_SFN_CIN |
| Red Ruffing | NYA | -0.9 | 193109171_BAL_NYA |
| Tommy Bridges | DET | -0.75 | 193109150_DET_NYA |
| Sam Gray | BAL | -0.73 | 193109172_BAL_NYA |
| Socks Seibold | ATL | -0.51 | 193109161_ATL_CHN |
Based on accumulated WAA for this season up to 1931-09-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 13.37 | Lefty Grove | 267.7 | OAK |
| +005+ | 10.32 | Bill Walker | 239.3 | SFN |
| +008+ | 9.13 | Carl Hubbell | 246.7 | SFN |
| +011+ | 7.58 | Freddie Fitzsimmons | 243.7 | SFN |
| +016+ | 6.53 | Lefty Gomez | 226.3 | NYA |
| +017+ | 6.43 | Larry French | 268 | PIT |
| +018+ | 6.37 | Ed Brandt | 240.7 | ATL |
| +019+ | 6.23 | Bill Hallahan | 234.3 | SLN |
| +021+ | 6.13 | Tom Zachary | 218.3 | ATL |
| +023+ | 5.63 | Heinie Meine | 253 | PIT |
| +026+ | 5.03 | Bob Smith | 233.3 | CHN |
| +027+ | 4.91 | Lloyd Brown | 239.7 | MIN |
| +031+ | 4.21 | Syl Johnson | 173.7 | SLN |
| +032+ | 4.16 | Ray Kremer | 231 | PIT |
| +036+ | 4.13 | Watty Clark | 215.3 | LAN |
| +035+ | 4.13 | George Earnshaw | 272 | OAK |
| +039+ | 4.08 | Ray Benge | 227.3 | PHI |
| +038+ | 4.08 | Dazzy Vance | 212.7 | LAN |
| +044+ | 3.64 | Glenn Spencer | 177 | PIT |
| +046+ | 3.52 | Bump Hadley | 165.3 | MIN |
| +047+ | 3.48 | Jim Mooney | 62.7 | SFN |
| +048+ | 3.42 | Firpo Marberry | 199.7 | MIN |
| +051+ | 3.15 | Larry Benton | 185.7 | CIN |
| +052+ | 3.13 | Red Lucas | 219.7 | CIN |
| +054+ | 3.08 | Flint Rhem | 201.3 | SLN |
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