| Starter | Tm | Tier | Game |
|---|---|---|---|
| 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 |
| Johnny Allen | CLE | 4.47 | 193806120_CLE_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Walkup | BAL | -2.49 | 193806121_BAL_OAK |
| Wes Ferrell | MIN | -1.72 | 193806120_DET_MIN |
| Bud Thomas | OAK | -1.49 | 193806122_BAL_OAK |
| Hugh Mulcahy | PHI | -1.27 | 193806100_PHI_PIT |
| Roxie Lawson | DET | -1.22 | 193806110_DET_MIN |
Based on accumulated WAA for this season up to 1938-06-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 4.57 | Paul Derringer | 111 | CIN |
| +005+ | 4.4 | Bill Lee | 98.3 | CHN |
| +006+ | 4.04 | Lefty Grove | 99.3 | BOS |
| +007+ | 3.81 | Carl Hubbell | 81 | SFN |
| +009+ | 3.37 | Johnny Vander Meer | 83.7 | CIN |
| +011+ | 3.12 | Red Ruffing | 84 | NYA |
| +013+ | 3.02 | Bob Feller | 83 | CLE |
| +017+ | 2.55 | Cliff Melton | 98 | SFN |
| +021+ | 2.39 | Bill McGee | 75 | SLN |
| +022+ | 2.37 | Tot Pressnell | 78 | LAN |
| +023+ | 2.3 | Bill Swift | 55 | PIT |
| +024+ | 2.29 | Hal Schumacher | 78.3 | SFN |
| +027+ | 2.12 | Danny MacFayden | 78.3 | ATL |
| +028+ | 2.09 | Larry French | 98.3 | CHN |
| +030+ | 2.06 | Jack Wilson | 71.7 | BOS |
| +029+ | 2.06 | Bob Klinger | 54.7 | PIT |
| +032+ | 2 | Lynn Nelson | 72 | OAK |
| +033+ | 2 | Johnny Allen | 89.7 | CLE |
| +034+ | 1.99 | Monty Stratton | 38.3 | CHA |
| +035+ | 1.93 | George Caster | 90 | OAK |
| +036+ | 1.89 | Dizzy Dean | 25.7 | CHN |
| +038+ | 1.83 | Freddie Fitzsimmons | 72.7 | LAN |
| +039+ | 1.77 | Buck Ross | 44.7 | OAK |
| +043+ | 1.58 | Lou Fette | 75 | ATL |
| +042+ | 1.58 | Milt Shoffner | 75 | ATL |
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