| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Lee | CHN | 5.25 | 193806290_SLN_CHN |
| Johnny Allen | CLE | 5.21 | 193806280_DET_CLE |
| Red Ruffing | NYA | 2.57 | 193806300_OAK_NYA |
| Lou Fette | ATL | 2.14 | 193806290_ATL_LAN |
| Cliff Melton | SFN | 2.1 | 193806292_SFN_PHI |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Walkup | BAL | -3.61 | 193806280_CHA_BAL |
| Jimmie DeShong | MIN | -2.87 | 193806300_MIN_BOS |
| Bucky Walters | CIN | -1.22 | 193806300_CIN_PIT |
| Elden Auker | DET | -1.02 | 193806290_DET_CLE |
| Jack Knott | CHA | -0.98 | 193806300_CHA_BAL |
Based on accumulated WAA for this season up to 1938-06-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 5.2 | Johnny Vander Meer | 118.3 | CIN |
| +008+ | 4.13 | Bill Lee | 120 | CHN |
| +010+ | 3.93 | Lefty Grove | 127.7 | BOS |
| +012+ | 3.89 | Paul Derringer | 132.7 | CIN |
| +011+ | 3.89 | Cliff Melton | 127.3 | SFN |
| +013+ | 3.66 | Carl Hubbell | 104 | SFN |
| +014+ | 3.63 | Bill McGee | 93 | SLN |
| +015+ | 3.4 | Bob Feller | 117 | CLE |
| +017+ | 3.29 | Johnny Allen | 118 | CLE |
| +019+ | 3.1 | Danny MacFayden | 87.3 | ATL |
| +022+ | 3.04 | Jack Wilson | 82.3 | BOS |
| +024+ | 2.91 | Red Ruffing | 108.3 | NYA |
| +025+ | 2.88 | Freddie Fitzsimmons | 89.7 | LAN |
| +026+ | 2.87 | Tot Pressnell | 104.3 | LAN |
| +030+ | 2.69 | Clay Bryant | 95.3 | CHN |
| +031+ | 2.64 | Bob Klinger | 65.7 | PIT |
| +034+ | 2.49 | Bill Swift | 72.7 | PIT |
| +035+ | 2.35 | Monty Stratton | 66.7 | CHA |
| +038+ | 2.22 | Ted Lyons | 75.7 | CHA |
| +040+ | 2.15 | Lynn Nelson | 104.3 | OAK |
| +041+ | 2.14 | Larry French | 108.7 | CHN |
| +045+ | 1.99 | Jim Turner | 106 | ATL |
| +046+ | 1.96 | Dizzy Dean | 25.7 | CHN |
| +048+ | 1.93 | Jim Bagby | 75.7 | BOS |
| +050+ | 1.84 | Dutch Leonard | 106.3 | MIN |
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