| Starter | Tm | Tier | Game |
|---|---|---|---|
| Burleigh Grimes | SLN | 6.21 | 193105170_SLN_SFN |
| Bill Walker | SFN | 5.18 | 193105180_SLN_SFN |
| Rube Walberg | OAK | 3.2 | 193105180_OAK_CLE |
| Wes Ferrell | CLE | 2.42 | 193105170_OAK_CLE |
| Milt Gaston | BOS | 2.11 | 193105170_BOS_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ed Wells | NYA | -0.53 | 193105180_NYA_DET |
| Heinie Meine | PIT | -0.49 | 193105170_PIT_ATL |
| Lil Stoner | PHI | -0.43 | 193105180_CHN_PHI |
| Ben Cantwell | ATL | -0.27 | 193105190_CHN_ATL |
| Guy Bush | CHN | -0.26 | 193105190_CHN_ATL |
Based on accumulated WAA for this season up to 1931-05-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 3.19 | Lloyd Brown | 71.7 | MIN |
| +004+ | 2.8 | Burleigh Grimes | 48 | SLN |
| +005+ | 2.67 | Ed Brandt | 54 | ATL |
| +006+ | 2.66 | Freddie Fitzsimmons | 57 | SFN |
| +010+ | 2.23 | Bill Walker | 43 | SFN |
| +011+ | 2.19 | Socks Seibold | 49 | ATL |
| +016+ | 1.77 | Pat Caraway | 58.3 | CHA |
| +018+ | 1.76 | Tom Zachary | 42.3 | ATL |
| +019+ | 1.71 | Wilcy Moore | 39.7 | BOS |
| +021+ | 1.66 | Clarence Mitchell | 46 | SFN |
| +023+ | 1.63 | Earl Whitehill | 61 | DET |
| +024+ | 1.61 | Eddie Rommel | 28 | OAK |
| +025+ | 1.6 | Lefty Grove | 43.3 | OAK |
| +029+ | 1.44 | Rube Walberg | 63.7 | OAK |
| +028+ | 1.44 | Heinie Meine | 61 | PIT |
| +032+ | 1.33 | Jesse Haines | 30 | SLN |
| XXXXX | 1.19 | Jack Berly | 20 | SFN |
| XXXXX | 1.11 | Bill Hallahan | 36.7 | SLN |
| XXXXX | 1.09 | Ed Morris | 22.3 | BOS |
| XXXXX | 1.07 | Syl Johnson | 25 | SLN |
| XXXXX | 1.06 | Pat Malone | 35 | CHN |
| XXXXX | 0.96 | Red Lucas | 53 | CIN |
| XXXXX | 0.89 | Charlie Root | 46.3 | CHN |
| XXXXX | 0.86 | Ray Phelps | 43.3 | LAN |
| XXXXX | 0.84 | Ray Benge | 48.3 | PHI |
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