| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Hubbell | SFN | 6.37 | 193806082_SFN_CHN |
| Lefty Grove | BOS | 6.26 | 193806090_CLE_BOS |
| Red Ruffing | NYA | 5.81 | 193806070_CHA_NYA |
| Johnny Allen | CLE | 5.03 | 193806070_CLE_BOS |
| Bill Lee | CHN | 4.54 | 193806070_SFN_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Russ Van Atta | BAL | -3.07 | 193806090_BAL_MIN |
| Jimmie DeShong | MIN | -2.21 | 193806090_BAL_MIN |
| Bud Thomas | OAK | -1.46 | 193806080_DET_OAK |
| Bill Dietrich | CHA | -1.04 | 193806082_CHA_NYA |
| Mel Harder | CLE | -0.96 | 193806090_CLE_BOS |
Based on accumulated WAA for this season up to 1938-06-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 4.14 | Paul Derringer | 102 | CIN |
| +005+ | 4.07 | Lefty Grove | 99.3 | BOS |
| +006+ | 3.89 | Carl Hubbell | 74 | SFN |
| +007+ | 3.72 | Bill Lee | 91.3 | CHN |
| +008+ | 3.49 | Red Ruffing | 75 | NYA |
| +009+ | 3.11 | Bob Feller | 80 | CLE |
| +014+ | 2.66 | Larry French | 93.3 | CHN |
| +016+ | 2.51 | Johnny Vander Meer | 74.7 | CIN |
| +017+ | 2.46 | Bob Klinger | 52.3 | PIT |
| +019+ | 2.37 | Tot Pressnell | 78 | LAN |
| +020+ | 2.35 | Cliff Melton | 90 | SFN |
| +021+ | 2.32 | Johnny Allen | 84.7 | CLE |
| +023+ | 2.17 | Bill McGee | 67 | SLN |
| +028+ | 1.95 | Danny MacFayden | 70.3 | ATL |
| +029+ | 1.95 | Lynn Nelson | 72 | OAK |
| +031+ | 1.89 | Dizzy Dean | 25.7 | CHN |
| +033+ | 1.8 | George Caster | 81 | OAK |
| +034+ | 1.76 | Milt Shoffner | 68.3 | ATL |
| +035+ | 1.74 | Boots Poffenberger | 63 | DET |
| +036+ | 1.74 | Hal Schumacher | 69.3 | SFN |
| +039+ | 1.68 | Jack Wilson | 63.7 | BOS |
| +041+ | 1.56 | Lou Fette | 75 | ATL |
| +044+ | 1.5 | Monty Stratton | 29.3 | CHA |
| +047+ | 1.48 | John Whitehead | 54 | CHA |
| +048+ | 1.47 | Buck Ross | 35.7 | OAK |
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