| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | BOS | 7.62 | 193805301_BOS_NYA |
| Johnny Allen | CLE | 4.94 | 193805302_CHA_CLE |
| Danny MacFayden | ATL | 4.43 | 193805302_SFN_ATL |
| Red Ruffing | NYA | 4.33 | 193805301_BOS_NYA |
| Van Mungo | LAN | 2.86 | 193805302_PHI_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wayne LaMaster | PHI | -2.46 | 193805302_PHI_LAN |
| Jim Walkup | BAL | -2.46 | 193806010_BAL_BOS |
| Jimmie DeShong | MIN | -2.33 | 193806010_CHA_MIN |
| Roxie Lawson | DET | -1.83 | 193805302_BAL_DET |
| Al Williams | OAK | -1.19 | 193805301_MIN_OAK |
Based on accumulated WAA for this season up to 1938-06-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 4.15 | Bob Feller | 71 | CLE |
| +003+ | 3.9 | Paul Derringer | 84.7 | CIN |
| +006+ | 3.53 | Carl Hubbell | 62 | SFN |
| +007+ | 2.91 | Red Ruffing | 59.3 | NYA |
| +008+ | 2.72 | Jack Wilson | 60.7 | BOS |
| +009+ | 2.7 | Lefty Grove | 81.3 | BOS |
| +010+ | 2.66 | Bill McGee | 58.3 | SLN |
| +011+ | 2.61 | Johnny Allen | 74.7 | CLE |
| +012+ | 2.53 | Tot Pressnell | 72.7 | LAN |
| +014+ | 2.19 | Bill Lee | 73.3 | CHN |
| +017+ | 2.16 | Cliff Melton | 82.3 | SFN |
| +019+ | 2.02 | Boots Poffenberger | 49 | DET |
| +022+ | 1.83 | Dizzy Dean | 25.7 | CHN |
| +026+ | 1.71 | Bob Klinger | 34.3 | PIT |
| +027+ | 1.7 | Danny MacFayden | 62 | ATL |
| +028+ | 1.66 | Larry French | 74.3 | CHN |
| +029+ | 1.66 | Johnny Vander Meer | 65.7 | CIN |
| +031+ | 1.6 | Vern Kennedy | 76 | DET |
| +035+ | 1.52 | Lou Fette | 60 | ATL |
| +036+ | 1.52 | Milt Shoffner | 57.7 | ATL |
| +037+ | 1.51 | George Caster | 65 | OAK |
| +040+ | 1.42 | Ted Lyons | 42 | CHA |
| +042+ | 1.37 | John Whitehead | 39.3 | CHA |
| +046+ | 1.32 | Lynn Nelson | 63 | OAK |
| +048+ | 1.28 | Buck Ross | 34.7 | OAK |
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