| 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 |
| Carl Hubbell | SFN | 3.83 | 193106040_SFN_SLN |
| Pat Caraway | CHA | 3.52 | 193106020_CHA_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Phil Collins | PHI | -1.09 | 193106030_PHI_CIN |
| Les Sweetland | CHN | -0.89 | 193106040_LAN_CHN |
| Ray Moss | ATL | -0.87 | 193106040_ATL_PIT |
| Erv Brame | PIT | -0.26 | 193106030_ATL_PIT |
| Carl Fischer | MIN | -0.22 | 193106020_DET_MIN |
Based on accumulated WAA for this season up to 1931-06-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.2 | Lefty Grove | 84.3 | OAK |
| +004+ | 3.98 | Pat Caraway | 92.3 | CHA |
| +008+ | 3.15 | Lloyd Brown | 93 | MIN |
| +013+ | 2.84 | Freddie Fitzsimmons | 79 | SFN |
| +014+ | 2.83 | Ed Brandt | 78 | ATL |
| +017+ | 2.27 | Rube Walberg | 91 | OAK |
| +018+ | 2.25 | Burleigh Grimes | 70 | SLN |
| +019+ | 2.2 | Tom Zachary | 56 | ATL |
| +022+ | 2.05 | Heinie Meine | 84 | PIT |
| +023+ | 1.97 | Clarence Mitchell | 72 | SFN |
| +025+ | 1.94 | Jack Berly | 45 | SFN |
| +026+ | 1.9 | Bill Walker | 55.7 | SFN |
| +027+ | 1.88 | Ray Benge | 73.3 | PHI |
| +030+ | 1.77 | Si Johnson | 73.7 | CIN |
| +031+ | 1.62 | George Uhle | 48.3 | DET |
| +033+ | 1.53 | George Earnshaw | 92 | OAK |
| +038+ | 1.37 | Sam Jones | 67 | MIN |
| +040+ | 1.33 | Les Sweetland | 48.3 | CHN |
| +042+ | 1.32 | Ed Morris | 33 | BOS |
| +043+ | 1.3 | Bob Smith | 61 | CHN |
| XXXXX | 1.25 | Syl Johnson | 44 | SLN |
| XXXXX | 1.24 | Earl Whitehill | 85 | DET |
| XXXXX | 1.24 | Bruce Cunningham | 39.3 | ATL |
| XXXXX | 1.08 | Ted Lyons | 39 | CHA |
| XXXXX | 1.04 | Jakie May | 32.3 | CHN |
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