| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 14.98 | 193108290_NYA_OAK |
| Lefty Gomez | NYA | 2.05 | 193108290_NYA_OAK |
| Si Johnson | CIN | 1.9 | 193108290_CIN_CHN |
| Larry French | PIT | 1.83 | 193108280_PIT_SLN |
| Firpo Marberry | MIN | 0.98 | 193108291_MIN_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Pat Caraway | CHA | -5.83 | 193108270_CHA_DET |
| Stew Bolen | PHI | -2.8 | 193108270_CIN_PHI |
| Jack Russell | BOS | -2.29 | 193108292_MIN_BOS |
| Tommy Bridges | DET | -1.47 | 193108290_CHA_DET |
| Red Ruffing | NYA | -1.37 | 193108280_NYA_OAK |
Based on accumulated WAA for this season up to 1931-08-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 11.52 | Lefty Grove | 240.7 | OAK |
| +008+ | 8.16 | Ed Brandt | 209.7 | ATL |
| +009+ | 7.83 | Bill Walker | 198 | SFN |
| +012+ | 6.62 | Carl Hubbell | 200.7 | SFN |
| +014+ | 6.05 | Freddie Fitzsimmons | 218.7 | SFN |
| +016+ | 5.46 | Ray Kremer | 209.3 | PIT |
| +017+ | 5.29 | Ray Benge | 208.7 | PHI |
| +018+ | 5.2 | Larry French | 239.3 | PIT |
| +021+ | 4.97 | Lloyd Brown | 208.7 | MIN |
| +024+ | 4.75 | Tom Zachary | 180.7 | ATL |
| +026+ | 4.48 | Bill Hallahan | 189.7 | SLN |
| +027+ | 4.29 | Lefty Gomez | 186.3 | NYA |
| +028+ | 4.09 | Charlie Root | 211.7 | CHN |
| +031+ | 3.91 | Heinie Meine | 226 | PIT |
| +033+ | 3.88 | Bob Smith | 203 | CHN |
| +034+ | 3.86 | Watty Clark | 182.7 | LAN |
| +035+ | 3.85 | Dazzy Vance | 184.7 | LAN |
| +037+ | 3.79 | Si Johnson | 228.7 | CIN |
| +038+ | 3.58 | George Earnshaw | 239 | OAK |
| +041+ | 3.48 | Jesse Haines | 116.3 | SLN |
| +042+ | 3.39 | Firpo Marberry | 177 | MIN |
| +043+ | 3.32 | Glenn Spencer | 145.7 | PIT |
| +049+ | 2.82 | Fred Heimach | 111.3 | LAN |
| +053+ | 2.66 | Syl Johnson | 155.7 | SLN |
| +056+ | 2.48 | George Uhle | 166 | DET |
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