| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Walker | SFN | 6.72 | 193105262_ATL_SFN |
| Lefty Stewart | BAL | 3.46 | 193105280_BAL_CLE |
| Rube Walberg | OAK | 2.21 | 193105280_NYA_OAK |
| Tom Zachary | ATL | 2.15 | 193105261_ATL_SFN |
| Pat Caraway | CHA | 2.1 | 193105272_DET_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Biff Wysong | CIN | -1.12 | 193105270_CHN_CIN |
| Vic Frazier | CHA | -0.51 | 193105271_DET_CHA |
| Guy Bush | CHN | -0.46 | 193105270_CHN_CIN |
| Ben Cantwell | ATL | -0.34 | 193105262_ATL_SFN |
| Mel Harder | CLE | -0.31 | 193105262_BAL_CLE |
Based on accumulated WAA for this season up to 1931-05-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.83 | Pat Caraway | 85.3 | CHA |
| +006+ | 3.19 | Bill Walker | 52 | SFN |
| +008+ | 3.14 | Lefty Grove | 63.3 | OAK |
| +009+ | 3.07 | Ed Brandt | 69.3 | ATL |
| +010+ | 3.05 | Burleigh Grimes | 56 | SLN |
| +012+ | 2.86 | Freddie Fitzsimmons | 71 | SFN |
| +015+ | 2.59 | Lloyd Brown | 86 | MIN |
| +017+ | 2.43 | Heinie Meine | 76 | PIT |
| +022+ | 1.96 | Red Lucas | 63 | CIN |
| +023+ | 1.9 | Jack Berly | 36 | SFN |
| +024+ | 1.79 | Rube Walberg | 82 | OAK |
| +026+ | 1.75 | Tom Zachary | 45.3 | ATL |
| +029+ | 1.59 | Si Johnson | 65.7 | CIN |
| +032+ | 1.44 | Earl Whitehill | 77 | DET |
| +033+ | 1.39 | Wilcy Moore | 46.3 | BOS |
| XXXXX | 1.22 | Socks Seibold | 57 | ATL |
| XXXXX | 1.21 | Jesse Haines | 39 | SLN |
| XXXXX | 1.13 | Syl Johnson | 36 | SLN |
| XXXXX | 1.12 | Eddie Rommel | 31.3 | OAK |
| XXXXX | 1.11 | George Uhle | 39.3 | DET |
| XXXXX | 1.09 | Ray Benge | 57 | PHI |
| XXXXX | 1.06 | Clarence Mitchell | 54 | SFN |
| XXXXX | 1.05 | Dazzy Vance | 43 | LAN |
| XXXXX | 1.03 | Bruce Cunningham | 25.3 | ATL |
| XXXXX | 1.02 | Charlie Root | 53.7 | CHN |
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