| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wes Ferrell | MIN | -3.31 | 193807090_OAK_MIN |
| Wayne LaMaster | PHI | -1.8 | 193807102_LAN_PHI |
| Bobo Newsom | BAL | -1.73 | 193807100_BAL_CLE |
| Bud Thomas | OAK | -1.1 | 193807101_OAK_MIN |
| Max Butcher | LAN | -0.97 | 193807102_LAN_PHI |
Based on accumulated WAA for this season up to 1938-07-11.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 6.54 | Johnny Vander Meer | 135.3 | CIN |
| +008+ | 4.64 | Cliff Melton | 142.3 | SFN |
| +009+ | 4.44 | Bill Lee | 135 | CHN |
| +012+ | 3.94 | Lefty Grove | 145.7 | BOS |
| +015+ | 3.71 | Carl Hubbell | 116 | SFN |
| +016+ | 3.69 | Bob Klinger | 83.7 | PIT |
| +017+ | 3.69 | Paul Derringer | 147 | CIN |
| +019+ | 3.55 | Lou Fette | 115.7 | ATL |
| +021+ | 3.36 | Bill McGee | 108 | SLN |
| +022+ | 3.31 | Johnny Allen | 134 | CLE |
| +024+ | 3.09 | Danny MacFayden | 87.3 | ATL |
| +026+ | 3.04 | Tot Pressnell | 120.3 | LAN |
| +028+ | 2.98 | Bill Swift | 89.3 | PIT |
| +029+ | 2.97 | Bob Feller | 132.7 | CLE |
| +032+ | 2.67 | Ted Lyons | 93.7 | CHA |
| +033+ | 2.63 | Hal Schumacher | 115.7 | SFN |
| +036+ | 2.42 | Red Ruffing | 115 | NYA |
| +040+ | 2.29 | Larry French | 126 | CHN |
| +042+ | 2.21 | Russ Bauers | 116 | PIT |
| +043+ | 2.12 | Jack Wilson | 86.7 | BOS |
| +045+ | 2.11 | Ira Hutchinson | 62.3 | ATL |
| +044+ | 2.11 | Freddie Fitzsimmons | 102.3 | LAN |
| +046+ | 2.09 | Dutch Leonard | 122.3 | MIN |
| +050+ | 2.04 | Peaches Davis | 98 | CIN |
| +053+ | 1.95 | Clay Bryant | 116.3 | CHN |
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