| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 16.32 | 193108190_OAK_CHA |
| Freddie Fitzsimmons | SFN | 4.84 | 193108171_SLN_SFN |
| Tom Zachary | ATL | 2.57 | 193108172_CHN_ATL |
| Dazzy Vance | LAN | 1.67 | 193108192_CHN_LAN |
| Bill Hallahan | SLN | 1.15 | 193108192_SLN_PHI |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Pat Caraway | CHA | -4.78 | 193108170_BOS_CHA |
| Jack Russell | BOS | -3.63 | 193108170_BOS_CHA |
| Stew Bolen | PHI | -2.76 | 193108180_PIT_PHI |
| Red Ruffing | NYA | -1.89 | 193108180_NYA_DET |
| Ownie Carroll | CIN | -1.67 | 193108172_CIN_LAN |
Based on accumulated WAA for this season up to 1931-08-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 11.28 | Lefty Grove | 227.3 | OAK |
| +008+ | 6.93 | Bill Walker | 181 | SFN |
| +010+ | 6.68 | Ed Brandt | 188.7 | ATL |
| +012+ | 5.83 | Carl Hubbell | 182.7 | SFN |
| +013+ | 5.61 | Freddie Fitzsimmons | 206.3 | SFN |
| +014+ | 5.2 | Ray Benge | 202.7 | PHI |
| +017+ | 5.02 | Ray Kremer | 194.3 | PIT |
| +021+ | 4.57 | Tom Zachary | 164.7 | ATL |
| +025+ | 4.25 | Lloyd Brown | 190.7 | MIN |
| +026+ | 4.16 | Si Johnson | 211.7 | CIN |
| +027+ | 4.13 | Firpo Marberry | 156.7 | MIN |
| +029+ | 4 | Dazzy Vance | 177 | LAN |
| +028+ | 4 | Bill Hallahan | 181.7 | SLN |
| +030+ | 4 | Larry French | 223 | PIT |
| +035+ | 3.54 | Charlie Root | 188.7 | CHN |
| +036+ | 3.33 | George Earnshaw | 236.3 | OAK |
| +038+ | 3.23 | Bob Smith | 187.7 | CHN |
| +039+ | 3.17 | Rube Walberg | 221.7 | OAK |
| +040+ | 3.03 | Watty Clark | 167 | LAN |
| +041+ | 2.95 | Heinie Meine | 199 | PIT |
| +042+ | 2.93 | Fred Frankhouse | 97.7 | ATL |
| +043+ | 2.92 | Larry Benton | 144.7 | CIN |
| +046+ | 2.87 | Flint Rhem | 161.3 | SLN |
| +045+ | 2.87 | Jesse Haines | 107.3 | SLN |
| +054+ | 2.55 | Jakie May | 67.7 | CHN |
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