| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Walker | SFN | 5.28 | 193106050_SFN_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 |
| Charlie Root | CHN | 2.19 | 193106050_LAN_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roy Sherid | NYA | -1.23 | 193106060_CLE_NYA |
| Stew Bolen | PHI | -1.21 | 193106050_PHI_CIN |
| Dick Coffman | BAL | -1.01 | 193106060_BAL_BOS |
| Les Sweetland | CHN | -0.89 | 193106040_LAN_CHN |
| Ray Moss | ATL | -0.87 | 193106040_ATL_PIT |
Based on accumulated WAA for this season up to 1931-06-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.1 | Lefty Grove | 90.3 | OAK |
| +008+ | 3.15 | Lloyd Brown | 93 | MIN |
| +009+ | 3.09 | Tom Zachary | 65 | ATL |
| +012+ | 2.95 | Pat Caraway | 95 | CHA |
| +014+ | 2.88 | Freddie Fitzsimmons | 79 | SFN |
| +015+ | 2.87 | Ed Brandt | 78 | ATL |
| +016+ | 2.69 | George Uhle | 59.3 | DET |
| +019+ | 2.35 | Burleigh Grimes | 71 | SLN |
| +021+ | 2.24 | Si Johnson | 82.7 | CIN |
| +022+ | 2.18 | Sam Jones | 78 | MIN |
| +025+ | 2.01 | Clarence Mitchell | 72 | SFN |
| +026+ | 2 | Heinie Meine | 92 | PIT |
| +027+ | 1.98 | Bob Smith | 70 | CHN |
| +028+ | 1.92 | Ray Benge | 73.3 | PHI |
| +029+ | 1.88 | Jack Berly | 53 | SFN |
| +030+ | 1.85 | Rube Walberg | 98 | OAK |
| +034+ | 1.68 | George Earnshaw | 94 | OAK |
| +037+ | 1.6 | Charlie Root | 68.3 | CHN |
| +038+ | 1.58 | Ed Morris | 40 | BOS |
| +039+ | 1.56 | Ray Kremer | 85.3 | PIT |
| +044+ | 1.41 | Bill Walker | 61.3 | SFN |
| +047+ | 1.34 | Les Sweetland | 48.3 | CHN |
| +049+ | 1.26 | Bruce Cunningham | 39.3 | ATL |
| XXXXX | 1.23 | Earl Whitehill | 85 | DET |
| XXXXX | 1.07 | Clise Dudley | 57.7 | PHI |
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