| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Walker | SFN | 5.28 | 193106050_SFN_SLN |
| Burleigh Grimes | SLN | 5.25 | 193106071_LAN_SLN |
| Pat Caraway | CHA | 3.38 | 193106060_CHA_MIN |
| Rube Walberg | OAK | 2.32 | 193106060_DET_OAK |
| Tom Zachary | ATL | 2.3 | 193106050_ATL_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ownie Carroll | CIN | -3.21 | 193106072_ATL_CIN |
| Roy Sherid | NYA | -1.23 | 193106060_CLE_NYA |
| Stew Bolen | PHI | -1.21 | 193106050_PHI_CIN |
| Dick Coffman | BAL | -1.01 | 193106060_BAL_BOS |
| Roy Mahaffey | OAK | -0.76 | 193106070_OAK_DET |
Based on accumulated WAA for this season up to 1931-06-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.14 | Lefty Grove | 90.3 | OAK |
| +002+ | 4.02 | Lloyd Brown | 102 | MIN |
| +010+ | 3.13 | Tom Zachary | 65 | ATL |
| +012+ | 3 | Pat Caraway | 95 | CHA |
| +016+ | 2.71 | George Uhle | 59.3 | DET |
| +018+ | 2.32 | Freddie Fitzsimmons | 83 | SFN |
| +019+ | 2.21 | Sam Jones | 78 | MIN |
| +021+ | 2.1 | Clarence Mitchell | 72 | SFN |
| +022+ | 2.05 | Bob Smith | 70 | CHN |
| +023+ | 2.03 | Heinie Meine | 92 | PIT |
| +025+ | 1.96 | Ed Brandt | 83.3 | ATL |
| +027+ | 1.95 | Ray Benge | 73.3 | PHI |
| +026+ | 1.95 | Jack Berly | 53 | SFN |
| +028+ | 1.88 | Rube Walberg | 98 | OAK |
| +029+ | 1.71 | George Earnshaw | 94 | OAK |
| +030+ | 1.68 | Charlie Root | 68.3 | CHN |
| +031+ | 1.64 | Lefty Gomez | 57.3 | NYA |
| +033+ | 1.63 | Bill Hallahan | 72 | SLN |
| +034+ | 1.62 | Si Johnson | 84.7 | CIN |
| +036+ | 1.6 | Ed Morris | 40 | BOS |
| +037+ | 1.6 | Burleigh Grimes | 76 | SLN |
| +038+ | 1.59 | Ray Kremer | 85.3 | PIT |
| +043+ | 1.49 | Bill Walker | 61.3 | SFN |
| +049+ | 1.39 | Les Sweetland | 48.3 | CHN |
| +053+ | 1.26 | Earl Whitehill | 85 | DET |
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