| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 13.78 | 193106190_OAK_CHA |
| Lefty Stewart | BAL | 3.64 | 193106170_BAL_MIN |
| George Uhle | DET | 3.3 | 193106190_BOS_DET |
| Carl Hubbell | SFN | 2.4 | 193106180_PIT_SFN |
| Dazzy Vance | LAN | 2.37 | 193106181_CHN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Les Sweetland | CHN | -1.11 | 193106181_CHN_LAN |
| Phil Collins | PHI | -1.02 | 193106190_CIN_PHI |
| Ray Kolp | CIN | -0.66 | 193106190_CIN_PHI |
| Hank Johnson | NYA | -0.45 | 193106190_NYA_BAL |
| Sam Gray | BAL | -0.07 | 193106190_NYA_BAL |
Based on accumulated WAA for this season up to 1931-06-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.15 | Lefty Grove | 117.3 | OAK |
| +009+ | 3.79 | Lloyd Brown | 111.3 | MIN |
| +011+ | 3.47 | Freddie Fitzsimmons | 101 | SFN |
| +012+ | 3.36 | George Earnshaw | 121 | OAK |
| +013+ | 3.28 | Charlie Root | 86.3 | CHN |
| +016+ | 3 | Tom Zachary | 73.7 | ATL |
| +017+ | 3 | Bill Hallahan | 90 | SLN |
| +019+ | 2.97 | Clarence Mitchell | 98 | SFN |
| +020+ | 2.88 | George Uhle | 77.3 | DET |
| +021+ | 2.68 | Si Johnson | 103.7 | CIN |
| +026+ | 2.47 | Ed Morris | 51 | BOS |
| +027+ | 2.44 | Rube Walberg | 113.7 | OAK |
| +029+ | 2.33 | Ed Brandt | 99 | ATL |
| +032+ | 2.17 | Heinie Meine | 108 | PIT |
| +033+ | 2.15 | Ray Benge | 86.7 | PHI |
| +035+ | 2.06 | Jack Berly | 56 | SFN |
| +036+ | 2 | Lefty Gomez | 67.3 | NYA |
| +038+ | 1.9 | Ray Kremer | 96.7 | PIT |
| +041+ | 1.72 | Watty Clark | 76 | LAN |
| +043+ | 1.65 | Red Lucas | 99.7 | CIN |
| +046+ | 1.55 | Carl Hubbell | 79 | SFN |
| +048+ | 1.5 | Burleigh Grimes | 89.7 | SLN |
| +052+ | 1.42 | Larry French | 115.3 | PIT |
| +053+ | 1.4 | Dazzy Vance | 81.3 | LAN |
| +054+ | 1.34 | Syl Johnson | 64 | SLN |
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