| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 14.99 | 193109180_CHA_OAK |
| Bill Walker | SFN | 6.83 | 193109170_SFN_SLN |
| Larry French | PIT | 2.84 | 193109181_ATL_PIT |
| Ed Brandt | ATL | 2.8 | 193109181_ATL_PIT |
| Lefty Gomez | NYA | 2.76 | 193109172_BAL_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Russell | BOS | -4.35 | 193109181_CLE_BOS |
| Waite Hoyt | OAK | -2.29 | 193109192_CHA_OAK |
| Tommy Thomas | CHA | -1.48 | 193109192_CHA_OAK |
| Clint Brown | CLE | -1.22 | 193109182_CLE_BOS |
| Red Ruffing | NYA | -0.9 | 193109171_BAL_NYA |
Based on accumulated WAA for this season up to 1931-09-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 13.93 | Lefty Grove | 276.7 | OAK |
| +006+ | 10.24 | Bill Walker | 239.3 | SFN |
| +008+ | 9.05 | Carl Hubbell | 246.7 | SFN |
| +011+ | 7.79 | Freddie Fitzsimmons | 251 | SFN |
| +016+ | 6.77 | Ed Brandt | 249.7 | ATL |
| +017+ | 6.47 | Lefty Gomez | 226.3 | NYA |
| +018+ | 6.19 | Heinie Meine | 262 | PIT |
| +019+ | 6.15 | Bill Hallahan | 234.3 | SLN |
| +021+ | 6.09 | Tom Zachary | 218.3 | ATL |
| +024+ | 5.6 | Larry French | 269 | PIT |
| +026+ | 5.14 | Lloyd Brown | 248.7 | MIN |
| +027+ | 4.96 | Bob Smith | 233.3 | CHN |
| +029+ | 4.87 | Ray Benge | 236.3 | PHI |
| +035+ | 4.15 | Syl Johnson | 173.7 | SLN |
| +036+ | 4.09 | Ray Kremer | 231 | PIT |
| +037+ | 4.07 | Watty Clark | 215.3 | LAN |
| +038+ | 4.04 | George Earnshaw | 272 | OAK |
| +042+ | 3.76 | Bump Hadley | 169.3 | MIN |
| +043+ | 3.76 | Dazzy Vance | 218.7 | LAN |
| +044+ | 3.75 | Firpo Marberry | 211.7 | MIN |
| +047+ | 3.58 | Glenn Spencer | 177 | PIT |
| +048+ | 3.48 | Jim Mooney | 71.7 | SFN |
| +051+ | 3.19 | Charlie Root | 245.7 | CHN |
| +052+ | 3.08 | Larry Benton | 185.7 | CIN |
| +054+ | 3.05 | Red Lucas | 219.7 | CIN |
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