| 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 |
| Heinie Meine | PIT | -0.49 | 193105170_PIT_ATL |
| Tommy Bridges | DET | -0.36 | 193105160_NYA_DET |
Based on accumulated WAA for this season up to 1931-05-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.13 | Lloyd Brown | 71.7 | MIN |
| +004+ | 2.73 | Burleigh Grimes | 48 | SLN |
| +005+ | 2.6 | Freddie Fitzsimmons | 57 | SFN |
| +009+ | 2.17 | Rube Walberg | 56.3 | OAK |
| +010+ | 2.16 | Socks Seibold | 49 | ATL |
| +013+ | 1.98 | Ed Brandt | 45 | ATL |
| +014+ | 1.73 | Tom Zachary | 42.3 | ATL |
| +015+ | 1.73 | Pat Caraway | 58.3 | CHA |
| +018+ | 1.67 | Wilcy Moore | 39.7 | BOS |
| +019+ | 1.61 | Clarence Mitchell | 46 | SFN |
| +021+ | 1.59 | Eddie Rommel | 28 | OAK |
| +024+ | 1.51 | Earl Whitehill | 58 | DET |
| +026+ | 1.41 | Lefty Grove | 41.7 | OAK |
| +029+ | 1.37 | Bill Walker | 34 | SFN |
| +030+ | 1.35 | Heinie Meine | 61 | PIT |
| XXXXX | 1.17 | Jack Berly | 20 | SFN |
| XXXXX | 1.16 | Jesse Haines | 24 | SLN |
| XXXXX | 1.07 | Ed Morris | 22.3 | BOS |
| XXXXX | 1.04 | Syl Johnson | 25 | SLN |
| XXXXX | 1.01 | Pat Malone | 35 | CHN |
| XXXXX | 0.96 | Ed Baecht | 12.3 | CHN |
| XXXXX | 0.88 | Red Lucas | 53 | CIN |
| XXXXX | 0.82 | Charlie Root | 46.3 | CHN |
| XXXXX | 0.76 | Vic Sorrell | 59 | DET |
| XXXXX | 0.74 | Clint Brown | 49.7 | CLE |
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