| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 16.49 | 193107170_DET_OAK |
| Freddie Fitzsimmons | SFN | 6.38 | 193107170_SFN_CHN |
| Watty Clark | LAN | 3.98 | 193107150_LAN_SLN |
| Charlie Root | CHN | 2.43 | 193107160_SFN_CHN |
| Ray Kremer | PIT | 1.52 | 193107170_PHI_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sam Gray | BAL | -1.35 | 193107160_BAL_BOS |
| Roy Mahaffey | OAK | -0.93 | 193107160_DET_OAK |
| Vic Frazier | CHA | -0.83 | 193107170_CHA_MIN |
| Hod Lisenbee | BOS | -0.68 | 193107160_BAL_BOS |
| Red Ruffing | NYA | -0.57 | 193107160_CLE_NYA |
Based on accumulated WAA for this season up to 1931-07-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 8.88 | Lefty Grove | 178 | OAK |
| +011+ | 4.34 | Freddie Fitzsimmons | 149.7 | SFN |
| +012+ | 4.28 | Ed Brandt | 141.7 | ATL |
| +016+ | 4.08 | Watty Clark | 119.7 | LAN |
| +017+ | 3.92 | Tom Zachary | 116.7 | ATL |
| +018+ | 3.81 | Ray Benge | 143.7 | PHI |
| +021+ | 3.47 | Bill Hallahan | 138.7 | SLN |
| +023+ | 3.46 | Ray Kremer | 151.3 | PIT |
| +024+ | 3.35 | Lloyd Brown | 157.7 | MIN |
| +025+ | 3.23 | Heinie Meine | 149 | PIT |
| +026+ | 3.18 | Carl Hubbell | 121 | SFN |
| +027+ | 3.08 | Si Johnson | 152 | CIN |
| +029+ | 2.93 | Bill Walker | 110 | SFN |
| +031+ | 2.92 | Dazzy Vance | 120.7 | LAN |
| +030+ | 2.92 | Charlie Root | 134.3 | CHN |
| +032+ | 2.88 | George Earnshaw | 181 | OAK |
| +034+ | 2.8 | Jack Ogden | 54.3 | CIN |
| +040+ | 2.24 | Socks Seibold | 123 | ATL |
| +043+ | 2.15 | Bob Smith | 135 | CHN |
| +050+ | 1.86 | Rube Walberg | 166.3 | OAK |
| +058+ | 1.7 | Red Lucas | 132.3 | CIN |
| +060+ | 1.67 | Bruce Cunningham | 87.3 | ATL |
| +061+ | 1.65 | Ed Wells | 64.3 | NYA |
| +063+ | 1.61 | Firpo Marberry | 98.7 | MIN |
| +064+ | 1.57 | Jumbo Elliott | 150.7 | PHI |
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