| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | BOS | 8.5 | 193805110_CHA_BOS |
| Van Mungo | LAN | 5.09 | 193805110_LAN_CHN |
| Bob Feller | CLE | 2.59 | 193805120_CLE_NYA |
| Tex Carleton | CHN | 1.99 | 193805110_LAN_CHN |
| Cliff Melton | SFN | 1.31 | 193805110_SFN_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Knott | BAL | -3.36 | 193805110_BAL_OAK |
| Roxie Lawson | DET | -2.51 | 193805120_DET_MIN |
| Wes Ferrell | MIN | -1.6 | 193805130_MIN_BOS |
| Mel Harder | CLE | -1.3 | 193805110_CLE_NYA |
| Eddie Smith | OAK | -0.05 | 193805110_BAL_OAK |
Based on accumulated WAA for this season up to 1938-05-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 3 | Bob Feller | 50 | CLE |
| +004+ | 2.59 | Dutch Leonard | 45 | MIN |
| +005+ | 2.53 | Jack Wilson | 32 | BOS |
| +006+ | 2.51 | Lefty Grove | 51 | BOS |
| +008+ | 1.97 | Carl Hubbell | 35 | SFN |
| +009+ | 1.96 | Paul Derringer | 47.3 | CIN |
| +010+ | 1.88 | Dizzy Dean | 25.7 | CHN |
| +011+ | 1.87 | Van Mungo | 33 | LAN |
| +013+ | 1.74 | Peaches Davis | 36.7 | CIN |
| +014+ | 1.69 | Boots Poffenberger | 23 | DET |
| +015+ | 1.68 | Tot Pressnell | 35.3 | LAN |
| +018+ | 1.49 | Lon Warneke | 33 | SLN |
| +019+ | 1.47 | Vern Kennedy | 41.7 | DET |
| +021+ | 1.39 | Red Ruffing | 41.3 | NYA |
| +023+ | 1.33 | Buck Ross | 34.7 | OAK |
| +022+ | 1.33 | Bucky Walters | 42 | PHI |
| +025+ | 1.26 | Johnny Allen | 38.7 | CLE |
| XXXXX | 1.24 | Johnny Marcum | 36 | BOS |
| XXXXX | 1.17 | Lou Fette | 32 | ATL |
| XXXXX | 1.14 | Ted Lyons | 25 | CHA |
| XXXXX | 1.14 | Cliff Melton | 48 | SFN |
| XXXXX | 1.1 | Fritz Ostermueller | 26 | BOS |
| XXXXX | 1.01 | Lynn Nelson | 23 | OAK |
| XXXXX | 0.96 | Harry Gumbert | 39.7 | SFN |
| XXXXX | 0.95 | Hal Schumacher | 35.3 | SFN |
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