| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 9.19 | 193105301_OAK_BOS |
| Bill Walker | SFN | 8.19 | 193105302_LAN_SFN |
| Tom Zachary | ATL | 1.96 | 193105312_ATL_LAN |
| Milt Gaston | BOS | 1.87 | 193105311_OAK_BOS |
| George Uhle | DET | 1.55 | 193105310_CLE_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ownie Carroll | CIN | -3 | 193105311_CIN_SLN |
| Ray Benge | PHI | -1.61 | 193105301_ATL_PHI |
| Les Sweetland | CHN | -1.46 | 193105301_CHN_PIT |
| Hank Johnson | NYA | -0.93 | 193105302_NYA_MIN |
| Ed Durham | BOS | -0.87 | 193105302_OAK_BOS |
Based on accumulated WAA for this season up to 1931-06-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.35 | Lefty Grove | 75.3 | OAK |
| +002+ | 3.88 | Pat Caraway | 85.3 | CHA |
| +007+ | 3.15 | Lloyd Brown | 93 | MIN |
| +011+ | 2.94 | Ed Brandt | 69.3 | ATL |
| +012+ | 2.9 | Freddie Fitzsimmons | 71 | SFN |
| +017+ | 2.28 | Tom Zachary | 56 | ATL |
| +018+ | 2.19 | Heinie Meine | 84 | PIT |
| +020+ | 2.04 | Burleigh Grimes | 61 | SLN |
| +021+ | 2 | Ray Benge | 66 | PHI |
| +022+ | 1.93 | Jack Berly | 45 | SFN |
| +023+ | 1.88 | Bill Walker | 55.7 | SFN |
| +024+ | 1.85 | Rube Walberg | 82 | OAK |
| +025+ | 1.8 | Si Johnson | 73.7 | CIN |
| +027+ | 1.6 | George Uhle | 48.3 | DET |
| +029+ | 1.52 | Wilcy Moore | 47.7 | BOS |
| +030+ | 1.52 | Clarence Mitchell | 63 | SFN |
| +032+ | 1.48 | Earl Whitehill | 77 | DET |
| +036+ | 1.37 | Sam Jones | 67 | MIN |
| +037+ | 1.34 | Ed Morris | 33 | BOS |
| +038+ | 1.32 | Bob Smith | 61 | CHN |
| +039+ | 1.3 | Dazzy Vance | 49 | LAN |
| XXXXX | 1.22 | Jesse Haines | 48 | SLN |
| XXXXX | 1.18 | Carl Hubbell | 52.7 | SFN |
| XXXXX | 1.16 | Jakie May | 27 | CHN |
| XXXXX | 1.16 | Syl Johnson | 43 | SLN |
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