| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 12.85 | 193106080_DET_OAK |
| Bill Walker | SFN | 4.14 | 193106100_SFN_PIT |
| Lefty Stewart | BAL | 3.66 | 193106080_BAL_BOS |
| Tom Zachary | ATL | 3.2 | 193106100_ATL_SLN |
| Pat Malone | CHN | 2.77 | 193106080_SFN_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Phil Collins | PHI | -0.74 | 193106100_PHI_CHN |
| Les Sweetland | CHN | -0.6 | 193106090_SFN_CHN |
| Ray Moss | ATL | -0.39 | 193106090_ATL_CIN |
| Red Ruffing | NYA | -0.23 | 193106080_CLE_NYA |
| Erv Brame | PIT | -0.18 | 193106090_PHI_PIT |
Based on accumulated WAA for this season up to 1931-06-10.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.64 | Lefty Grove | 99.3 | OAK |
| +002+ | 4.1 | Lloyd Brown | 102 | MIN |
| +010+ | 3.33 | Tom Zachary | 73 | ATL |
| +011+ | 3.04 | Clarence Mitchell | 81 | SFN |
| +015+ | 2.84 | Pat Caraway | 103 | CHA |
| +016+ | 2.77 | George Uhle | 59.3 | DET |
| +017+ | 2.6 | Charlie Root | 77.3 | CHN |
| +022+ | 2.39 | Freddie Fitzsimmons | 83 | SFN |
| +023+ | 2.32 | Sam Jones | 83 | MIN |
| +024+ | 2.22 | George Earnshaw | 103 | OAK |
| +025+ | 2.09 | Bob Smith | 70 | CHN |
| +026+ | 2.09 | Heinie Meine | 92 | PIT |
| +027+ | 2.03 | Ed Brandt | 83.3 | ATL |
| +028+ | 2.01 | Ray Benge | 73.3 | PHI |
| +029+ | 2 | Jack Berly | 53 | SFN |
| +030+ | 1.94 | Rube Walberg | 98 | OAK |
| +031+ | 1.82 | Ed Morris | 42 | BOS |
| +034+ | 1.74 | Lefty Stewart | 90 | BAL |
| +037+ | 1.68 | Lefty Gomez | 57.3 | NYA |
| +036+ | 1.68 | Bill Hallahan | 72 | SLN |
| +038+ | 1.67 | Si Johnson | 84.7 | CIN |
| +039+ | 1.64 | Burleigh Grimes | 76 | SLN |
| +040+ | 1.64 | Ray Kremer | 85.3 | PIT |
| XXXXX | 1.19 | Jakie May | 33.3 | CHN |
| XXXXX | 1.15 | Red Lucas | 83.7 | CIN |
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