| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 11.42 | 193106030_CHA_OAK |
| Bill Walker | SFN | 5.28 | 193106050_SFN_SLN |
| Lefty Stewart | BAL | 4.13 | 193106030_BAL_NYA |
| Dazzy Vance | LAN | 2.99 | 193106030_LAN_CHN |
| Tom Zachary | ATL | 2.3 | 193106050_ATL_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Stew Bolen | PHI | -1.21 | 193106050_PHI_CIN |
| Les Sweetland | CHN | -0.89 | 193106040_LAN_CHN |
| Ray Moss | ATL | -0.87 | 193106040_ATL_PIT |
| Roy Mahaffey | OAK | -0.71 | 193106050_CHA_OAK |
| Erv Brame | PIT | -0.26 | 193106030_ATL_PIT |
Based on accumulated WAA for this season up to 1931-06-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.05 | Lefty Grove | 90.3 | OAK |
| +004+ | 3.88 | Pat Caraway | 92.3 | CHA |
| +008+ | 3.09 | Lloyd Brown | 93 | MIN |
| +011+ | 3.04 | Tom Zachary | 65 | ATL |
| +014+ | 2.82 | Freddie Fitzsimmons | 79 | SFN |
| +015+ | 2.81 | Ed Brandt | 78 | ATL |
| +017+ | 2.65 | George Uhle | 59.3 | DET |
| +019+ | 2.31 | Burleigh Grimes | 71 | SLN |
| +021+ | 2.2 | Si Johnson | 82.7 | CIN |
| +022+ | 2.18 | Rube Walberg | 91 | OAK |
| +024+ | 2.13 | Sam Jones | 78 | MIN |
| +026+ | 1.95 | Clarence Mitchell | 72 | SFN |
| +025+ | 1.95 | Heinie Meine | 92 | PIT |
| +027+ | 1.93 | Jack Berly | 45 | SFN |
| +028+ | 1.88 | Ray Benge | 73.3 | PHI |
| +033+ | 1.57 | Charlie Root | 68.3 | CHN |
| +034+ | 1.56 | Ed Morris | 40 | BOS |
| +039+ | 1.43 | George Earnshaw | 92 | OAK |
| +043+ | 1.36 | Bill Walker | 61.3 | SFN |
| +044+ | 1.31 | Les Sweetland | 48.3 | CHN |
| +046+ | 1.28 | Bob Smith | 61 | CHN |
| XXXXX | 1.23 | Bruce Cunningham | 39.3 | ATL |
| XXXXX | 1.17 | Earl Whitehill | 85 | DET |
| XXXXX | 1.04 | Ted Lyons | 39 | CHA |
| XXXXX | 1.03 | Clise Dudley | 57.7 | PHI |
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