| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Walker | SFN | 6.23 | 193108261_CHN_SFN |
| Tom Zachary | ATL | 2.66 | 193108262_SLN_ATL |
| Larry French | PIT | 1.83 | 193108280_PIT_SLN |
| Rube Walberg | OAK | 0.93 | 193108260_OAK_BAL |
| Burleigh Grimes | SLN | 0.61 | 193108262_SLN_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Pat Caraway | CHA | -5.83 | 193108270_CHA_DET |
| Stew Bolen | PHI | -2.8 | 193108270_CIN_PHI |
| Red Ruffing | NYA | -1.37 | 193108280_NYA_OAK |
| Ray Kolp | CIN | -0.9 | 193108270_CIN_PHI |
| Les Sweetland | CHN | -0.81 | 193108271_CHN_PIT |
Based on accumulated WAA for this season up to 1931-08-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 11.86 | Lefty Grove | 235.3 | OAK |
| +008+ | 8.18 | Ed Brandt | 209.7 | ATL |
| +009+ | 7.85 | Bill Walker | 198 | SFN |
| +012+ | 6.64 | Carl Hubbell | 200.7 | SFN |
| +013+ | 6.08 | Freddie Fitzsimmons | 218.7 | SFN |
| +016+ | 5.48 | Ray Kremer | 209.3 | PIT |
| +017+ | 5.32 | Ray Benge | 208.7 | PHI |
| +018+ | 5.22 | Larry French | 239.3 | PIT |
| +020+ | 5.18 | Si Johnson | 225.7 | CIN |
| +023+ | 4.95 | Lloyd Brown | 208.7 | MIN |
| +024+ | 4.95 | Lefty Gomez | 184.3 | NYA |
| +026+ | 4.77 | Tom Zachary | 180.7 | ATL |
| +027+ | 4.5 | Bill Hallahan | 189.7 | SLN |
| +033+ | 3.9 | Bob Smith | 203 | CHN |
| +034+ | 3.88 | Watty Clark | 182.7 | LAN |
| +035+ | 3.87 | Dazzy Vance | 184.7 | LAN |
| +037+ | 3.61 | George Earnshaw | 239 | OAK |
| +039+ | 3.49 | Jesse Haines | 116.3 | SLN |
| +040+ | 3.49 | Heinie Meine | 217 | PIT |
| +041+ | 3.45 | Charlie Root | 202.7 | CHN |
| +042+ | 3.33 | Glenn Spencer | 145.7 | PIT |
| +049+ | 2.83 | Fred Heimach | 111.3 | LAN |
| +050+ | 2.82 | Firpo Marberry | 169 | MIN |
| +056+ | 2.5 | George Uhle | 166 | DET |
| +058+ | 2.45 | Burleigh Grimes | 192.3 | SLN |
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