| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 6.59 | 193105200_OAK_DET |
| Bill Walker | SFN | 5.18 | 193105180_SLN_SFN |
| Lefty Stewart | BAL | 3.87 | 193105200_BOS_BAL |
| Milt Gaston | BOS | 2.77 | 193105200_BOS_BAL |
| Ted Lyons | CHA | 1.79 | 193105180_BOS_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Fred Frankhouse | ATL | -0.88 | 193105200_CHN_ATL |
| Ed Wells | NYA | -0.53 | 193105180_NYA_DET |
| Lil Stoner | PHI | -0.43 | 193105180_CHN_PHI |
| Guy Bush | CHN | -0.26 | 193105190_CHN_ATL |
| Larry Benton | CIN | -0.23 | 193105190_CIN_SFN |
Based on accumulated WAA for this season up to 1931-05-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 3.19 | Lloyd Brown | 71.7 | MIN |
| +004+ | 2.81 | Burleigh Grimes | 48 | SLN |
| +007+ | 2.66 | Freddie Fitzsimmons | 57 | SFN |
| +006+ | 2.66 | Ed Brandt | 54 | ATL |
| +009+ | 2.45 | Lefty Grove | 52.3 | OAK |
| +010+ | 2.41 | Pat Caraway | 67.3 | CHA |
| +012+ | 2.23 | Bill Walker | 43 | SFN |
| +014+ | 2.18 | Socks Seibold | 49 | ATL |
| +015+ | 2.01 | Jack Berly | 29 | SFN |
| +021+ | 1.75 | Tom Zachary | 42.3 | ATL |
| +023+ | 1.66 | Clarence Mitchell | 46 | SFN |
| +024+ | 1.62 | Earl Whitehill | 61 | DET |
| +025+ | 1.61 | Eddie Rommel | 28 | OAK |
| +028+ | 1.45 | Heinie Meine | 61 | PIT |
| +029+ | 1.43 | Rube Walberg | 63.7 | OAK |
| +032+ | 1.36 | Wilcy Moore | 40.3 | BOS |
| +035+ | 1.34 | Sam Jones | 50.7 | MIN |
| +034+ | 1.34 | Jesse Haines | 30 | SLN |
| XXXXX | 1.1 | Ed Morris | 22.3 | BOS |
| XXXXX | 1.05 | Pat Malone | 35 | CHN |
| XXXXX | 1.03 | Syl Johnson | 29 | SLN |
| XXXXX | 0.97 | Red Lucas | 53 | CIN |
| XXXXX | 0.94 | Bill Hallahan | 37 | SLN |
| XXXXX | 0.88 | Charlie Root | 46.3 | CHN |
| XXXXX | 0.85 | Ray Phelps | 43.3 | LAN |
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