| 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 |
| Roxie Lawson | DET | -1.83 | 193805302_BAL_DET |
| Wes Ferrell | MIN | -1.78 | 193805290_BOS_MIN |
| Les Tietje | BAL | -1.44 | 193805302_BAL_DET |
| Al Williams | OAK | -1.19 | 193805301_MIN_OAK |
Based on accumulated WAA for this season up to 1938-05-31.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 4.13 | Bob Feller | 71 | CLE |
| +004+ | 3.9 | Paul Derringer | 84.7 | CIN |
| +005+ | 3.52 | Carl Hubbell | 62 | SFN |
| +007+ | 2.92 | Red Ruffing | 59.3 | NYA |
| +008+ | 2.73 | Jack Wilson | 60.7 | BOS |
| +009+ | 2.71 | Lefty Grove | 81.3 | BOS |
| +010+ | 2.65 | Bill McGee | 58.3 | SLN |
| +011+ | 2.59 | Johnny Allen | 74.7 | CLE |
| +013+ | 2.25 | Tot Pressnell | 65.7 | LAN |
| +014+ | 2.2 | Bill Lee | 73.3 | CHN |
| +016+ | 2.03 | Boots Poffenberger | 49 | DET |
| +022+ | 1.83 | Dizzy Dean | 25.7 | CHN |
| +025+ | 1.71 | Bob Klinger | 34.3 | PIT |
| +026+ | 1.71 | Danny MacFayden | 62 | ATL |
| +027+ | 1.66 | Larry French | 74.3 | CHN |
| +032+ | 1.52 | George Caster | 65 | OAK |
| +031+ | 1.52 | Milt Shoffner | 57.7 | ATL |
| +030+ | 1.52 | Lou Fette | 60 | ATL |
| +033+ | 1.49 | Lynn Nelson | 54 | OAK |
| +035+ | 1.46 | Cliff Melton | 75.3 | SFN |
| +038+ | 1.42 | Ted Lyons | 42 | CHA |
| +041+ | 1.33 | Vern Kennedy | 67 | DET |
| +042+ | 1.29 | Buck Ross | 34.7 | OAK |
| +043+ | 1.26 | Harry Gumbert | 64.7 | SFN |
| XXXXX | 1.24 | Dutch Leonard | 63.7 | MIN |
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