| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 6.59 | 193105200_OAK_DET |
| Lefty Stewart | BAL | 3.87 | 193105200_BOS_BAL |
| Milt Gaston | BOS | 2.77 | 193105200_BOS_BAL |
| George Uhle | DET | 1.17 | 193105200_OAK_DET |
| Pat Caraway | CHA | 1.16 | 193105200_MIN_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Fred Frankhouse | ATL | -0.88 | 193105200_CHN_ATL |
| Stew Bolen | PHI | -0.36 | 193105200_PIT_PHI |
| Guy Bush | CHN | -0.26 | 193105190_CHN_ATL |
| Tommy Bridges | DET | -0.24 | 193105210_OAK_DET |
| Larry Benton | CIN | -0.23 | 193105190_CIN_SFN |
Based on accumulated WAA for this season up to 1931-05-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 3.22 | Lloyd Brown | 71.7 | MIN |
| +004+ | 2.82 | Burleigh Grimes | 48 | SLN |
| +007+ | 2.67 | Ed Brandt | 54 | ATL |
| +008+ | 2.67 | Freddie Fitzsimmons | 57 | SFN |
| +009+ | 2.47 | Lefty Grove | 52.3 | OAK |
| +010+ | 2.42 | Pat Caraway | 67.3 | CHA |
| +011+ | 2.24 | Bill Walker | 43 | SFN |
| +013+ | 2.19 | Socks Seibold | 49 | ATL |
| +016+ | 2.01 | Jack Berly | 29 | SFN |
| +021+ | 1.76 | Tom Zachary | 42.3 | ATL |
| +024+ | 1.67 | Clarence Mitchell | 46 | SFN |
| +025+ | 1.67 | Rube Walberg | 66 | OAK |
| +026+ | 1.63 | Earl Whitehill | 61 | DET |
| +028+ | 1.53 | Eddie Rommel | 29.3 | OAK |
| +029+ | 1.47 | Heinie Meine | 61 | PIT |
| +033+ | 1.38 | Wilcy Moore | 40.3 | BOS |
| +034+ | 1.36 | Sam Jones | 50.7 | MIN |
| +035+ | 1.34 | Jesse Haines | 30 | SLN |
| XXXXX | 1.11 | Ed Morris | 22.3 | BOS |
| XXXXX | 1.06 | Pat Malone | 35 | CHN |
| XXXXX | 1.04 | Syl Johnson | 29 | SLN |
| XXXXX | 0.99 | Red Lucas | 53 | CIN |
| XXXXX | 0.95 | Bill Hallahan | 37 | SLN |
| XXXXX | 0.89 | Charlie Root | 46.3 | CHN |
| XXXXX | 0.86 | Ray Phelps | 43.3 | LAN |
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