| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Hubbell | SFN | 6.37 | 193806082_SFN_CHN |
| Red Ruffing | NYA | 5.81 | 193806070_CHA_NYA |
| Johnny Allen | CLE | 5.03 | 193806070_CLE_BOS |
| Bill Lee | CHN | 4.54 | 193806070_SFN_CHN |
| Paul Derringer | CIN | 3.07 | 193806080_PHI_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bud Thomas | OAK | -1.46 | 193806080_DET_OAK |
| Jack Knott | BAL | -1.28 | 193806060_BAL_NYA |
| Ken Chase | MIN | -1.06 | 193806060_CLE_MIN |
| Bill Dietrich | CHA | -1.04 | 193806082_CHA_NYA |
| Earl Whitehill | CLE | -0.86 | 193806060_CLE_MIN |
Based on accumulated WAA for this season up to 1938-06-08.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 4.14 | Paul Derringer | 102 | CIN |
| +005+ | 3.88 | Carl Hubbell | 74 | SFN |
| +006+ | 3.71 | Bill Lee | 91.3 | CHN |
| +007+ | 3.49 | Red Ruffing | 75 | NYA |
| +008+ | 3.15 | Lefty Grove | 90.3 | BOS |
| +010+ | 3.09 | Bob Feller | 80 | CLE |
| +014+ | 2.65 | Larry French | 93.3 | CHN |
| +015+ | 2.5 | Johnny Vander Meer | 74.7 | CIN |
| +016+ | 2.45 | Bob Klinger | 52.3 | PIT |
| +019+ | 2.36 | Tot Pressnell | 78 | LAN |
| +020+ | 2.35 | Cliff Melton | 90 | SFN |
| +021+ | 2.29 | Johnny Allen | 84.7 | CLE |
| +023+ | 2.17 | Bill McGee | 67 | SLN |
| +024+ | 2.13 | Vern Kennedy | 85 | DET |
| +030+ | 1.94 | Lynn Nelson | 72 | OAK |
| +031+ | 1.92 | Danny MacFayden | 70.3 | ATL |
| +032+ | 1.89 | Dizzy Dean | 25.7 | CHN |
| +033+ | 1.79 | George Caster | 81 | OAK |
| +035+ | 1.73 | Milt Shoffner | 68.3 | ATL |
| +036+ | 1.73 | Boots Poffenberger | 63 | DET |
| +034+ | 1.73 | Hal Schumacher | 69.3 | SFN |
| +039+ | 1.68 | Jack Wilson | 63.7 | BOS |
| +043+ | 1.53 | Lou Fette | 75 | ATL |
| +046+ | 1.49 | Monty Stratton | 29.3 | CHA |
| +048+ | 1.46 | Buck Ross | 35.7 | OAK |
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