| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Walker | SFN | 4.14 | 193106100_SFN_PIT |
| Burleigh Grimes | SLN | 3.63 | 193106120_ATL_SLN |
| Tom Zachary | ATL | 3.2 | 193106100_ATL_SLN |
| Wes Ferrell | CLE | 3.12 | 193106120_CLE_MIN |
| George Uhle | DET | 3 | 193106120_DET_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Les Sweetland | CHN | -1.46 | 193106120_PHI_CHN |
| Dick Coffman | BAL | -1.06 | 193106120_BAL_OAK |
| Hank Johnson | NYA | -0.84 | 193106120_CHA_NYA |
| Phil Collins | PHI | -0.74 | 193106100_PHI_CHN |
| Roy Mahaffey | OAK | -0.49 | 193106120_BAL_OAK |
Based on accumulated WAA for this season up to 1931-06-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.63 | Lefty Grove | 99.3 | OAK |
| +008+ | 3.51 | Lloyd Brown | 104.7 | MIN |
| +011+ | 3.36 | Tom Zachary | 73.3 | ATL |
| +014+ | 2.99 | Clarence Mitchell | 81 | SFN |
| +015+ | 2.94 | George Uhle | 67.3 | DET |
| +017+ | 2.85 | Pat Caraway | 103 | CHA |
| +018+ | 2.79 | Freddie Fitzsimmons | 92 | SFN |
| +021+ | 2.59 | Charlie Root | 77.3 | CHN |
| +022+ | 2.54 | Bob Smith | 79 | CHN |
| +024+ | 2.49 | Si Johnson | 95.7 | CIN |
| +025+ | 2.32 | Sam Jones | 83 | MIN |
| +026+ | 2.21 | George Earnshaw | 103 | OAK |
| +028+ | 2.05 | Jack Berly | 56 | SFN |
| +029+ | 2.02 | Ed Brandt | 92 | ATL |
| +033+ | 1.81 | Ed Morris | 42 | BOS |
| +034+ | 1.8 | Ray Benge | 77.3 | PHI |
| +035+ | 1.76 | Heinie Meine | 100 | PIT |
| +036+ | 1.75 | Lefty Stewart | 90 | BAL |
| +039+ | 1.67 | Lefty Gomez | 57.3 | NYA |
| +038+ | 1.67 | Bill Hallahan | 72 | SLN |
| +041+ | 1.63 | Socks Seibold | 83.7 | ATL |
| +045+ | 1.53 | Rube Walberg | 104.7 | OAK |
| +053+ | 1.38 | Syl Johnson | 58 | SLN |
| +055+ | 1.35 | Carl Fischer | 79.3 | MIN |
| +054+ | 1.35 | Red Lucas | 92.7 | CIN |
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