| Starter | Tm | Tier | Game |
|---|---|---|---|
| Johnny Allen | CLE | 4.78 | 193807031_CLE_CHA |
| Bill Lee | CHN | 4.44 | 193807030_CHN_CIN |
| Red Ruffing | NYA | 2.92 | 193807041_NYA_MIN |
| Paul Derringer | CIN | 2.32 | 193807080_CIN_CHN |
| Cliff Melton | SFN | 2.22 | 193807032_SFN_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Walkup | BAL | -3.75 | 193807041_BAL_CHA |
| Chief Hogsett | MIN | -3.75 | 193807042_NYA_MIN |
| Bill Hallahan | PHI | -1.4 | 193807032_PHI_LAN |
| Bucky Walters | CIN | -1.26 | 193807042_PIT_CIN |
| Vern Kennedy | DET | -1.2 | 193807031_DET_BAL |
Based on accumulated WAA for this season up to 1938-07-08.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 5.65 | Johnny Vander Meer | 126.3 | CIN |
| +008+ | 4.38 | Bill Lee | 128 | CHN |
| +009+ | 4.26 | Carl Hubbell | 113 | SFN |
| +010+ | 4.17 | Cliff Melton | 133.3 | SFN |
| +012+ | 3.9 | Johnny Allen | 127 | CLE |
| +016+ | 3.68 | Paul Derringer | 147 | CIN |
| +015+ | 3.68 | Bob Klinger | 83.7 | PIT |
| +017+ | 3.66 | Lefty Grove | 136.7 | BOS |
| +019+ | 3.33 | Bill McGee | 108 | SLN |
| +023+ | 3.07 | Tot Pressnell | 113.3 | LAN |
| +024+ | 3.07 | Danny MacFayden | 87.3 | ATL |
| +026+ | 2.86 | Bill Swift | 81.7 | PIT |
| +027+ | 2.86 | Bob Feller | 125 | CLE |
| +031+ | 2.65 | Lou Fette | 106.7 | ATL |
| +032+ | 2.63 | Hal Schumacher | 115.7 | SFN |
| +033+ | 2.6 | Ted Lyons | 84.7 | CHA |
| +034+ | 2.57 | Clay Bryant | 112 | CHN |
| +035+ | 2.44 | Larry French | 117 | CHN |
| +036+ | 2.4 | Red Ruffing | 115 | NYA |
| +037+ | 2.36 | Freddie Fitzsimmons | 97.7 | LAN |
| +038+ | 2.3 | Jim Bagby | 86.3 | BOS |
| +040+ | 2.2 | Peaches Davis | 89 | CIN |
| +043+ | 2.13 | Jack Wilson | 86.7 | BOS |
| +046+ | 2.1 | Ira Hutchinson | 62.3 | ATL |
| +050+ | 1.96 | George Caster | 119.7 | OAK |
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