| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 6.08 | 193105160_OAK_CLE |
| Lefty Stewart | BAL | 4.6 | 193105150_MIN_BAL |
| Charlie Root | CHN | 3.03 | 193105161_CHN_PHI |
| Carl Hubbell | SFN | 2.6 | 193105160_SLN_SFN |
| Dazzy Vance | LAN | 1.77 | 193105160_CIN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Clise Dudley | PHI | -2.39 | 193105161_CHN_PHI |
| Les Sweetland | CHN | -1.63 | 193105162_CHN_PHI |
| Hank Johnson | NYA | -1.04 | 193105160_NYA_DET |
| Tommy Bridges | DET | -0.36 | 193105160_NYA_DET |
| Jack Russell | BOS | -0.32 | 193105160_BOS_CHA |
Based on accumulated WAA for this season up to 1931-05-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 2.98 | Freddie Fitzsimmons | 50 | SFN |
| +002+ | 2.68 | Lloyd Brown | 62.7 | MIN |
| +007+ | 2.5 | Socks Seibold | 44 | ATL |
| +009+ | 2.14 | Rube Walberg | 56.3 | OAK |
| +011+ | 2.09 | Burleigh Grimes | 39 | SLN |
| +013+ | 1.96 | Ed Brandt | 45 | ATL |
| +014+ | 1.72 | Wilcy Moore | 38.3 | BOS |
| +015+ | 1.71 | Tom Zachary | 42.3 | ATL |
| +016+ | 1.69 | Pat Caraway | 58.3 | CHA |
| +021+ | 1.58 | Clarence Mitchell | 46 | SFN |
| +020+ | 1.58 | Eddie Rommel | 28 | OAK |
| +024+ | 1.48 | Earl Whitehill | 58 | DET |
| +027+ | 1.35 | Bill Walker | 34 | SFN |
| +028+ | 1.33 | Lefty Grove | 41 | OAK |
| XXXXX | 1.18 | Clint Brown | 48 | CLE |
| XXXXX | 1.15 | Jack Berly | 20 | SFN |
| XXXXX | 1.14 | Jesse Haines | 24 | SLN |
| XXXXX | 1.1 | Heinie Meine | 52 | PIT |
| XXXXX | 1.05 | Ed Morris | 22.3 | BOS |
| XXXXX | 1.02 | Syl Johnson | 25 | SLN |
| XXXXX | 0.99 | Pat Malone | 35 | CHN |
| XXXXX | 0.95 | Ed Baecht | 12.3 | CHN |
| XXXXX | 0.86 | Red Lucas | 53 | CIN |
| XXXXX | 0.79 | Charlie Root | 46.3 | CHN |
| XXXXX | 0.69 | Lefty Stewart | 46 | BAL |
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