| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | OAK | 17.45 | 193107131_MIN_OAK |
| Carl Hubbell | SFN | 4.68 | 193107150_SFN_CHN |
| Watty Clark | LAN | 3.98 | 193107150_LAN_SLN |
| Tom Zachary | ATL | 3.1 | 193107140_ATL_CIN |
| Firpo Marberry | MIN | 1.75 | 193107131_MIN_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Milt Shoffner | CLE | -2.28 | 193107141_CLE_NYA |
| Phil Collins | PHI | -1.82 | 193107142_PHI_PIT |
| Guy Bush | CHN | -1.79 | 193107140_SFN_CHN |
| Art Herring | DET | -1.09 | 193107140_DET_OAK |
| Waite Hoyt | OAK | -0.87 | 193107151_DET_OAK |
Based on accumulated WAA for this season up to 1931-07-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 8.25 | Lefty Grove | 169 | OAK |
| +009+ | 5.12 | Freddie Fitzsimmons | 144.7 | SFN |
| +012+ | 4.3 | Ed Brandt | 141.7 | ATL |
| +016+ | 4.09 | Watty Clark | 119.7 | LAN |
| +017+ | 3.94 | Tom Zachary | 116.7 | ATL |
| +018+ | 3.83 | Ray Benge | 143.7 | PHI |
| +021+ | 3.45 | Ray Kremer | 142.3 | PIT |
| +022+ | 3.39 | Lloyd Brown | 157.7 | MIN |
| +024+ | 3.26 | Heinie Meine | 149 | PIT |
| +025+ | 3.19 | Carl Hubbell | 121 | SFN |
| +026+ | 3.13 | Si Johnson | 152 | CIN |
| +028+ | 2.94 | Bill Walker | 110 | SFN |
| +029+ | 2.93 | Dazzy Vance | 120.7 | LAN |
| +030+ | 2.92 | George Earnshaw | 181 | OAK |
| +032+ | 2.82 | Jack Ogden | 54.3 | CIN |
| +034+ | 2.61 | Bill Hallahan | 129.7 | SLN |
| +036+ | 2.49 | Charlie Root | 125.3 | CHN |
| +041+ | 2.25 | Socks Seibold | 123 | ATL |
| +049+ | 1.93 | George Uhle | 110.3 | DET |
| +050+ | 1.92 | Fred Frankhouse | 70.7 | ATL |
| +052+ | 1.9 | Rube Walberg | 166.3 | OAK |
| +055+ | 1.82 | Clarence Mitchell | 122 | SFN |
| +057+ | 1.73 | Frank Watt | 70 | PHI |
| +065+ | 1.56 | Ed Wells | 63.3 | NYA |
| +066+ | 1.55 | Lefty Gomez | 110.7 | NYA |
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