| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 15.11 | 193108110_OAK_DET |
| Carl Hubbell | SFN | 6.62 | 193108121_PIT_SFN |
| Ray Kremer | PIT | 2.67 | 193108121_PIT_SFN |
| Firpo Marberry | MIN | 1.96 | 193108110_MIN_CHA |
| Lefty Gomez | NYA | 1.22 | 193108121_NYA_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Hank Johnson | NYA | -1.27 | 193108122_NYA_CLE |
| Les Sweetland | CHN | -1.12 | 193108100_CHN_PIT |
| Sam Gray | BAL | -0.84 | 193108120_BOS_BAL |
| Vic Frazier | CHA | -0.75 | 193108120_MIN_CHA |
| Frank Watt | PHI | -0.52 | 193108121_CHN_PHI |
Based on accumulated WAA for this season up to 1931-08-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 10.49 | Lefty Grove | 209.3 | OAK |
| +009+ | 6.05 | Bill Walker | 171 | SFN |
| +010+ | 5.73 | Ed Brandt | 177.7 | ATL |
| +011+ | 5.65 | Freddie Fitzsimmons | 188.3 | SFN |
| +013+ | 5.46 | Carl Hubbell | 175.7 | SFN |
| +016+ | 5.02 | Ray Kremer | 194.3 | PIT |
| +017+ | 4.69 | Lloyd Brown | 177.3 | MIN |
| +019+ | 4.51 | Ray Benge | 183.7 | PHI |
| +022+ | 4.35 | Tom Zachary | 148.3 | ATL |
| +023+ | 4.31 | Lefty Gomez | 156.3 | NYA |
| +025+ | 4 | Dazzy Vance | 161 | LAN |
| +027+ | 3.93 | Firpo Marberry | 147.7 | MIN |
| +029+ | 3.89 | Bill Hallahan | 160.7 | SLN |
| +031+ | 3.45 | George Earnshaw | 236.3 | OAK |
| +033+ | 3.41 | Larry French | 206 | PIT |
| +034+ | 3.03 | Si Johnson | 195.7 | CIN |
| +036+ | 2.94 | Jesse Haines | 101.3 | SLN |
| +038+ | 2.92 | Charlie Root | 179.7 | CHN |
| +039+ | 2.86 | Watty Clark | 160 | LAN |
| +040+ | 2.81 | Heinie Meine | 191 | PIT |
| +041+ | 2.74 | Rube Walberg | 211.7 | OAK |
| +044+ | 2.55 | Burleigh Grimes | 166.3 | SLN |
| +051+ | 2.37 | Larry Benton | 136.7 | CIN |
| +052+ | 2.36 | George Uhle | 149 | DET |
| +053+ | 2.32 | Flint Rhem | 155.3 | SLN |
_