| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 11.42 | 193106030_CHA_OAK |
| Burleigh Grimes | SLN | 5.05 | 193106020_SFN_SLN |
| Lefty Stewart | BAL | 4.13 | 193106030_BAL_NYA |
| Pat Caraway | CHA | 3.52 | 193106020_CHA_OAK |
| Pat Malone | CHN | 3.33 | 193106020_LAN_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Phil Collins | PHI | -1.09 | 193106030_PHI_CIN |
| Erv Brame | PIT | -0.26 | 193106030_ATL_PIT |
| Carl Fischer | MIN | -0.22 | 193106020_DET_MIN |
| Tony Kaufmann | SLN | -0.15 | 193106010_CIN_SLN |
| Vic Sorrell | DET | -0.13 | 193106030_DET_MIN |
Based on accumulated WAA for this season up to 1931-06-03.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.23 | Lefty Grove | 84.3 | OAK |
| +003+ | 3.99 | Pat Caraway | 92.3 | CHA |
| +007+ | 3.17 | Lloyd Brown | 93 | MIN |
| +012+ | 2.93 | Ed Brandt | 78 | ATL |
| +014+ | 2.85 | Freddie Fitzsimmons | 79 | SFN |
| +017+ | 2.31 | Rube Walberg | 91 | OAK |
| +019+ | 2.27 | Tom Zachary | 56 | ATL |
| +018+ | 2.27 | Burleigh Grimes | 70 | SLN |
| +020+ | 2.17 | Heinie Meine | 84 | PIT |
| +021+ | 2.03 | Ray Benge | 66 | PHI |
| +022+ | 1.98 | Clarence Mitchell | 72 | SFN |
| +023+ | 1.95 | Jack Berly | 45 | SFN |
| +026+ | 1.9 | Bill Walker | 55.7 | SFN |
| +028+ | 1.8 | Si Johnson | 73.7 | CIN |
| +030+ | 1.62 | George Uhle | 48.3 | DET |
| +036+ | 1.39 | Sam Jones | 67 | MIN |
| +039+ | 1.33 | Ed Morris | 33 | BOS |
| +041+ | 1.32 | Bob Smith | 61 | CHN |
| +043+ | 1.29 | Bruce Cunningham | 39.3 | ATL |
| +044+ | 1.26 | Syl Johnson | 44 | SLN |
| +045+ | 1.25 | Earl Whitehill | 85 | DET |
| XXXXX | 1.2 | Carl Hubbell | 52.7 | SFN |
| XXXXX | 1.1 | Les Sweetland | 39.3 | CHN |
| XXXXX | 1.08 | Ted Lyons | 39 | CHA |
| XXXXX | 1.05 | Jakie May | 32.3 | CHN |
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