| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sid Hudson | MIN | -6.83 | 194006210_MIN_BAL |
| Vern Kennedy | BAL | -5.15 | 194006210_MIN_BAL |
| Buck Ross | OAK | -2.41 | 194006210_OAK_CHA |
| Max Butcher | PIT | -1.24 | 194006200_PIT_ATL |
| Jack Knott | CHA | -0.27 | 194006210_OAK_CHA |
Based on accumulated WAA for this season up to 1940-06-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 4.3 | Bucky Walters | 120.3 | CIN |
| +003+ | 4.2 | Hugh Mulcahy | 105.7 | PHI |
| +004+ | 3.91 | Bob Feller | 118.7 | CLE |
| +006+ | 3.47 | Al Milnar | 105.7 | CLE |
| +007+ | 3.38 | Paul Derringer | 124 | CIN |
| +008+ | 3.27 | Al Smith | 67.3 | CLE |
| +012+ | 2.93 | Claude Passeau | 104.7 | CHN |
| +013+ | 2.69 | Bobo Newsom | 97.7 | DET |
| +021+ | 2.16 | Johnny Allen | 71 | CLE |
| +020+ | 2.16 | Larry French | 101 | CHN |
| +022+ | 2.13 | Monte Pearson | 73.7 | NYA |
| +024+ | 2.11 | Dutch Leonard | 110.7 | MIN |
| +026+ | 1.98 | Vern Olsen | 57.7 | CHN |
| +027+ | 1.95 | Kirby Higbe | 106.3 | PHI |
| +028+ | 1.92 | Dick Errickson | 72.3 | ATL |
| +029+ | 1.9 | Paul Dean | 28 | SFN |
| +031+ | 1.88 | Marius Russo | 56 | NYA |
| +032+ | 1.87 | Lon Warneke | 70.3 | SLN |
| +035+ | 1.78 | Jake Mooty | 25 | CHN |
| +036+ | 1.74 | Carl Hubbell | 78 | SFN |
| +038+ | 1.69 | Luke Hamlin | 71.3 | LAN |
| +041+ | 1.65 | Vito Tamulis | 48.7 | LAN |
| +043+ | 1.59 | Hal Schumacher | 70 | SFN |
| +044+ | 1.56 | Tex Carleton | 61 | LAN |
| +045+ | 1.55 | Joe Sullivan | 77 | ATL |
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