| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 15.11 | 193108110_OAK_DET |
| Carl Hubbell | SFN | 6.62 | 193108121_PIT_SFN |
| Tom Zachary | ATL | 3.03 | 193108132_CIN_ATL |
| Ray Kremer | PIT | 2.67 | 193108121_PIT_SFN |
| Dazzy Vance | LAN | 2.1 | 193108130_SLN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Hank Johnson | NYA | -1.27 | 193108122_NYA_CLE |
| Phil Collins | PHI | -1.19 | 193108130_CHN_PHI |
| Sam Gray | BAL | -0.84 | 193108120_BOS_BAL |
| Vic Frazier | CHA | -0.75 | 193108120_MIN_CHA |
| General Crowder | MIN | -0.27 | 193108120_MIN_CHA |
Based on accumulated WAA for this season up to 1931-08-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 10.51 | Lefty Grove | 209.3 | OAK |
| +009+ | 6.12 | Freddie Fitzsimmons | 197.3 | SFN |
| +010+ | 6.06 | Bill Walker | 171 | SFN |
| +012+ | 5.74 | Ed Brandt | 177.7 | ATL |
| +013+ | 5.47 | Carl Hubbell | 175.7 | SFN |
| +015+ | 5.06 | Ray Kremer | 194.3 | PIT |
| +018+ | 4.55 | Lloyd Brown | 182 | MIN |
| +019+ | 4.52 | Ray Benge | 183.7 | PHI |
| +021+ | 4.4 | Tom Zachary | 157.3 | ATL |
| +024+ | 4.33 | Lefty Gomez | 156.3 | NYA |
| +026+ | 3.96 | Firpo Marberry | 147.7 | MIN |
| +027+ | 3.94 | Bill Hallahan | 169.7 | SLN |
| +029+ | 3.86 | Dazzy Vance | 168 | LAN |
| +031+ | 3.53 | Si Johnson | 202.7 | CIN |
| +032+ | 3.48 | George Earnshaw | 236.3 | OAK |
| +034+ | 3.21 | Rube Walberg | 220.7 | OAK |
| +035+ | 3.17 | Larry French | 214 | PIT |
| +037+ | 2.95 | Charlie Root | 179.7 | CHN |
| +038+ | 2.95 | Jesse Haines | 101.3 | SLN |
| +040+ | 2.87 | Watty Clark | 160 | LAN |
| +041+ | 2.85 | Heinie Meine | 191 | PIT |
| +044+ | 2.57 | Burleigh Grimes | 166.3 | SLN |
| +051+ | 2.37 | George Uhle | 149 | DET |
| +050+ | 2.37 | Larry Benton | 136.7 | CIN |
| +053+ | 2.34 | Bump Hadley | 120 | MIN |
_