| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Hubbell | SFN | 4.29 | 193807210_SFN_SLN |
| Johnny Vander Meer | CIN | 4.01 | 193807200_ATL_CIN |
| Cy Blanton | PIT | 2.11 | 193807220_ATL_PIT |
| Lou Fette | ATL | 2.04 | 193807200_ATL_CIN |
| Bob Feller | CLE | 1.54 | 193807220_CLE_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wes Ferrell | MIN | -4.04 | 193807200_DET_MIN |
| Wayne LaMaster | PHI | -2.12 | 193807222_PHI_CIN |
| Clyde Shoun | SLN | -0.32 | 193807201_SFN_SLN |
| Lefty Mills | BAL | -0.24 | 193807220_BAL_MIN |
| Boots Poffenberger | DET | -0.2 | 193807200_DET_MIN |
Based on accumulated WAA for this season up to 1938-07-22.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 7.01 | Johnny Vander Meer | 153.3 | CIN |
| +003+ | 6.13 | Bill Lee | 153 | CHN |
| +009+ | 5.01 | Carl Hubbell | 134.7 | SFN |
| +012+ | 4.56 | Paul Derringer | 171 | CIN |
| +013+ | 4.43 | Lefty Grove | 149.7 | BOS |
| +017+ | 3.63 | Bill McGee | 118 | SLN |
| +022+ | 3.47 | Johnny Allen | 134 | CLE |
| +025+ | 3.3 | Clay Bryant | 137.3 | CHN |
| +028+ | 3.22 | Lou Fette | 133.3 | ATL |
| +029+ | 3.16 | Ted Lyons | 101.7 | CHA |
| +030+ | 3.12 | Red Ruffing | 133 | NYA |
| +032+ | 3.11 | Danny MacFayden | 94.3 | ATL |
| +034+ | 3.02 | Cliff Melton | 154.7 | SFN |
| +036+ | 2.91 | Bob Klinger | 99.7 | PIT |
| +038+ | 2.8 | Charlie Root | 76 | CHN |
| +039+ | 2.73 | Cy Blanton | 91.3 | PIT |
| +040+ | 2.64 | Dizzy Dean | 34.7 | CHN |
| +042+ | 2.63 | Freddie Fitzsimmons | 117 | LAN |
| +044+ | 2.55 | Jack Wilson | 100.7 | BOS |
| +046+ | 2.36 | Bill Swift | 94 | PIT |
| +049+ | 2.27 | Russ Bauers | 138.7 | PIT |
| +050+ | 2.23 | Tot Pressnell | 132 | LAN |
| +051+ | 2.23 | Peaches Davis | 109.3 | CIN |
| +052+ | 2.22 | Bob Weiland | 136 | SLN |
| +054+ | 2.17 | Monty Stratton | 87.7 | CHA |
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