| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | BOS | 6.45 | 193806270_BOS_CLE |
| Carl Hubbell | SFN | 3.97 | 193806260_CHN_SFN |
| Paul Derringer | CIN | 2.64 | 193806262_CIN_PHI |
| Red Ruffing | NYA | 2.42 | 193806250_NYA_DET |
| Bob Feller | CLE | 2.29 | 193806270_BOS_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wes Ferrell | MIN | -3.08 | 193806262_MIN_BAL |
| Wayne LaMaster | PHI | -2.13 | 193806262_CIN_PHI |
| Vito Tamulis | LAN | -0.88 | 193806260_SLN_LAN |
| Bucky Walters | CIN | -0.75 | 193806250_CIN_PHI |
| Roxie Lawson | DET | -0.7 | 193806250_NYA_DET |
Based on accumulated WAA for this season up to 1938-06-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +005+ | 4.8 | Bill Lee | 117 | CHN |
| +006+ | 4.61 | Johnny Vander Meer | 109.3 | CIN |
| +008+ | 4.09 | Bob Feller | 110 | CLE |
| +009+ | 3.86 | Lefty Grove | 127.7 | BOS |
| +011+ | 3.74 | Paul Derringer | 132.7 | CIN |
| +012+ | 3.6 | Tot Pressnell | 99.7 | LAN |
| +013+ | 3.59 | Carl Hubbell | 104 | SFN |
| +014+ | 3.56 | Bill McGee | 93 | SLN |
| +015+ | 3.54 | Johnny Allen | 108.7 | CLE |
| +018+ | 3.37 | Lynn Nelson | 99 | OAK |
| +020+ | 3.33 | Cliff Melton | 118.3 | SFN |
| +023+ | 3.02 | Danny MacFayden | 87.3 | ATL |
| +024+ | 2.99 | Jack Wilson | 82.3 | BOS |
| +026+ | 2.82 | Freddie Fitzsimmons | 89.7 | LAN |
| +029+ | 2.63 | Clay Bryant | 95.3 | CHN |
| +030+ | 2.59 | Bob Klinger | 65.7 | PIT |
| +033+ | 2.45 | Monty Stratton | 57.7 | CHA |
| +034+ | 2.39 | Dutch Leonard | 100.3 | MIN |
| +039+ | 2.18 | Lou Fette | 91.7 | ATL |
| +040+ | 2.17 | Ted Lyons | 75.7 | CHA |
| +042+ | 2.15 | Red Ruffing | 99.3 | NYA |
| +043+ | 2.07 | Larry French | 108.7 | CHN |
| +046+ | 1.94 | Dizzy Dean | 25.7 | CHN |
| +048+ | 1.91 | George Caster | 107.3 | OAK |
| +049+ | 1.88 | Bill Swift | 67 | PIT |
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