| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | BOS | 5.15 | 193807140_DET_BOS |
| Bill Lee | CHN | 4.87 | 193807142_PHI_CHN |
| Johnny Vander Meer | CIN | 3.93 | 193807150_SFN_CIN |
| Lou Fette | ATL | 3.33 | 193807140_ATL_SLN |
| Cliff Melton | SFN | 2.93 | 193807160_SFN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wes Ferrell | MIN | -3.07 | 193807150_CHA_MIN |
| Bobo Newsom | BAL | -2.3 | 193807140_BAL_NYA |
| Wayne LaMaster | PHI | -1.59 | 193807150_PHI_CHN |
| Bud Thomas | OAK | -1.34 | 193807140_CHA_OAK |
| Earl Whitehill | CLE | -0.86 | 193807160_CLE_OAK |
Based on accumulated WAA for this season up to 1938-07-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 6.93 | Johnny Vander Meer | 144.3 | CIN |
| +006+ | 5.22 | Bill Lee | 144 | CHN |
| +011+ | 4.44 | Lefty Grove | 149.7 | BOS |
| +012+ | 4.42 | Paul Derringer | 155 | CIN |
| +014+ | 3.91 | Cliff Melton | 145.7 | SFN |
| +015+ | 3.87 | Carl Hubbell | 116 | SFN |
| +016+ | 3.59 | Bob Klinger | 95 | PIT |
| +019+ | 3.49 | Lou Fette | 124.7 | ATL |
| +020+ | 3.44 | Johnny Allen | 134 | CLE |
| +021+ | 3.35 | Bill McGee | 113.3 | SLN |
| +027+ | 3.16 | Ted Lyons | 101.7 | CHA |
| +026+ | 3.16 | Danny MacFayden | 87.3 | ATL |
| +029+ | 3.16 | Larry French | 136 | CHN |
| +030+ | 3.13 | Bob Feller | 141.3 | CLE |
| +031+ | 3.11 | Red Ruffing | 133 | NYA |
| +034+ | 3 | Tot Pressnell | 123.3 | LAN |
| +038+ | 2.72 | Hal Schumacher | 123.3 | SFN |
| +041+ | 2.56 | Clay Bryant | 128 | CHN |
| +043+ | 2.54 | Freddie Fitzsimmons | 112.3 | LAN |
| +044+ | 2.51 | Cy Blanton | 75.3 | PIT |
| +045+ | 2.47 | Jack Wilson | 91.7 | BOS |
| +047+ | 2.34 | George Caster | 134.7 | OAK |
| +048+ | 2.33 | Russ Bauers | 123 | PIT |
| +050+ | 2.25 | Bill Swift | 92 | PIT |
| +051+ | 2.14 | Peaches Davis | 98 | CIN |
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