| 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 |
|---|---|---|---|
| Jack Russell | BOS | -2.08 | 193109042_OAK_BOS |
| Hank Johnson | NYA | -1.67 | 193109040_NYA_MIN |
| Chief Hogsett | DET | -1.42 | 193109022_DET_BAL |
| Waite Hoyt | OAK | -1.2 | 193109042_OAK_BOS |
| Ownie Carroll | CIN | -0.96 | 193109030_CHN_CIN |
Based on accumulated WAA for this season up to 1931-09-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 12.33 | Lefty Grove | 249.7 | OAK |
| +006+ | 9.49 | Bill Walker | 216 | SFN |
| +009+ | 7.64 | Carl Hubbell | 218.7 | SFN |
| +011+ | 7.27 | Ed Brandt | 222.7 | ATL |
| +013+ | 6.62 | Freddie Fitzsimmons | 227.7 | SFN |
| +017+ | 5.25 | Bill Hallahan | 206.7 | SLN |
| +019+ | 5.05 | Ray Kremer | 216.3 | PIT |
| +021+ | 4.97 | Tom Zachary | 194.3 | ATL |
| +022+ | 4.77 | Ray Benge | 210.3 | PHI |
| +025+ | 4.53 | Lloyd Brown | 213.7 | MIN |
| +024+ | 4.53 | Heinie Meine | 235 | PIT |
| +027+ | 4.48 | Larry French | 241 | PIT |
| +028+ | 4.46 | Lefty Gomez | 195.3 | NYA |
| +029+ | 4.37 | Dazzy Vance | 192.7 | LAN |
| +033+ | 3.96 | Watty Clark | 190.7 | LAN |
| +034+ | 3.93 | Si Johnson | 237.7 | CIN |
| +038+ | 3.8 | Charlie Root | 217.7 | CHN |
| +039+ | 3.8 | George Earnshaw | 244 | OAK |
| +041+ | 3.46 | Jesse Haines | 116.3 | SLN |
| +044+ | 3.24 | Glenn Spencer | 151.7 | PIT |
| +045+ | 3.09 | Bob Smith | 206 | CHN |
| +049+ | 2.93 | Firpo Marberry | 181.7 | MIN |
| +052+ | 2.79 | Jim Mooney | 37.7 | SFN |
| +051+ | 2.79 | Fred Heimach | 111.3 | LAN |
| +056+ | 2.64 | Syl Johnson | 155.7 | SLN |
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