| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lefty Grove | BOS | 7.2 | 193806140_BOS_BAL |
| Carl Hubbell | SFN | 6.63 | 193806122_SFN_SLN |
| Danny MacFayden | ATL | 5.32 | 193806110_ATL_CIN |
| Red Ruffing | NYA | 5.02 | 193806120_CLE_NYA |
| Bill Lee | CHN | 4.94 | 193806121_LAN_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Walkup | BAL | -2.49 | 193806121_BAL_OAK |
| Jimmie DeShong | MIN | -2 | 193806140_MIN_CLE |
| Bud Thomas | OAK | -1.49 | 193806122_BAL_OAK |
| Roxie Lawson | DET | -1.22 | 193806110_DET_MIN |
| Bill Dietrich | CHA | -1.2 | 193806122_CHA_BOS |
Based on accumulated WAA for this season up to 1938-06-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 4.54 | Paul Derringer | 111 | CIN |
| +005+ | 4.38 | Bill Lee | 98.3 | CHN |
| +006+ | 4.23 | Lefty Grove | 105.7 | BOS |
| +007+ | 3.79 | Carl Hubbell | 81 | SFN |
| +009+ | 3.34 | Johnny Vander Meer | 83.7 | CIN |
| +011+ | 3.09 | Red Ruffing | 84 | NYA |
| +012+ | 2.99 | Bob Feller | 83 | CLE |
| +018+ | 2.53 | Cliff Melton | 98 | SFN |
| +019+ | 2.52 | Hal Schumacher | 87.3 | SFN |
| +020+ | 2.46 | Lynn Nelson | 81 | OAK |
| +023+ | 2.38 | Bill McGee | 75 | SLN |
| +025+ | 2.35 | Tot Pressnell | 78 | LAN |
| +026+ | 2.3 | Bill Swift | 55 | PIT |
| +028+ | 2.1 | Jack Wilson | 72.3 | BOS |
| +029+ | 2.1 | Danny MacFayden | 78.3 | ATL |
| +030+ | 2.08 | Johnny Allen | 90.7 | CLE |
| +031+ | 2.07 | Larry French | 98.3 | CHN |
| +032+ | 2.06 | Bob Klinger | 54.7 | PIT |
| +034+ | 1.98 | Monty Stratton | 38.3 | CHA |
| +035+ | 1.9 | George Caster | 90 | OAK |
| +036+ | 1.88 | Dizzy Dean | 25.7 | CHN |
| +037+ | 1.81 | Freddie Fitzsimmons | 72.7 | LAN |
| +040+ | 1.75 | Buck Ross | 44.7 | OAK |
| +045+ | 1.57 | Milt Shoffner | 75 | ATL |
| +051+ | 1.46 | John Whitehead | 54 | CHA |
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