| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 14.19 | 193108031_MIN_OAK |
| Bill Walker | SFN | 4.71 | 193108042_LAN_SFN |
| Tom Zachary | ATL | 3.82 | 193108022_ATL_SFN |
| Charlie Root | CHN | 3.68 | 193108020_SLN_CHN |
| Dazzy Vance | LAN | 2.23 | 193108042_LAN_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Red Ruffing | NYA | -2.66 | 193108021_NYA_BOS |
| Guy Bush | CHN | -2.45 | 193108041_CIN_CHN |
| Jack Russell | BOS | -2.28 | 193108021_NYA_BOS |
| Chief Hogsett | DET | -1.51 | 193108040_CHA_DET |
| Phil Collins | PHI | -0.98 | 193108022_PHI_LAN |
Based on accumulated WAA for this season up to 1931-08-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 9.59 | Lefty Grove | 198 | OAK |
| +009+ | 5.53 | Carl Hubbell | 159.7 | SFN |
| +011+ | 5.47 | Ed Brandt | 168.7 | ATL |
| +012+ | 5.35 | Freddie Fitzsimmons | 179.3 | SFN |
| +015+ | 4.74 | Ray Benge | 177.7 | PHI |
| +016+ | 4.67 | Bill Walker | 153 | SFN |
| +017+ | 4.53 | Ray Kremer | 176.3 | PIT |
| +018+ | 4.48 | Lloyd Brown | 175.3 | MIN |
| +024+ | 3.88 | Charlie Root | 168.3 | CHN |
| +025+ | 3.88 | Tom Zachary | 139.3 | ATL |
| +026+ | 3.56 | Heinie Meine | 175 | PIT |
| +027+ | 3.53 | Dazzy Vance | 152 | LAN |
| +028+ | 3.49 | Larry French | 187.3 | PIT |
| +031+ | 3.26 | Lefty Gomez | 139.3 | NYA |
| +032+ | 3.25 | Bill Hallahan | 151.7 | SLN |
| +033+ | 3.03 | Rube Walberg | 204 | OAK |
| +034+ | 3.02 | Bump Hadley | 114.3 | MIN |
| +035+ | 3.01 | Watty Clark | 151 | LAN |
| +037+ | 2.99 | Si Johnson | 185 | CIN |
| +039+ | 2.83 | George Earnshaw | 217 | OAK |
| +044+ | 2.39 | Firpo Marberry | 129.7 | MIN |
| +046+ | 2.33 | Bob Smith | 165.3 | CHN |
| +052+ | 2.11 | Red Lucas | 157.3 | CIN |
| +053+ | 2.09 | Fred Heimach | 75 | LAN |
| +054+ | 2.08 | Jesse Haines | 92.3 | SLN |
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