| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Lee | CHN | 5.17 | 193808161_SLN_CHN |
| Carl Hubbell | SFN | 4 | 193808180_LAN_SFN |
| Paul Derringer | CIN | 3.76 | 193808180_CIN_CHN |
| Red Ruffing | NYA | 3.11 | 193808162_NYA_MIN |
| Russ Bauers | PIT | 2.4 | 193808180_PIT_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wes Ferrell | NYA | -4.1 | 193808181_NYA_MIN |
| Bobo Newsom | BAL | -4.05 | 193808180_BAL_CLE |
| Ken Chase | MIN | -1.93 | 193808161_NYA_MIN |
| Max Butcher | PHI | -1.51 | 193808170_ATL_PHI |
| Nels Potter | OAK | -1.13 | 193808172_OAK_BOS |
Based on accumulated WAA for this season up to 1938-08-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 6.95 | Paul Derringer | 225 | CIN |
| +006+ | 6.35 | Bill Lee | 207.7 | CHN |
| +009+ | 5.91 | Danny MacFayden | 146 | ATL |
| +012+ | 5.44 | Johnny Vander Meer | 180 | CIN |
| +018+ | 5.13 | Lou Fette | 174 | ATL |
| +020+ | 4.96 | Carl Hubbell | 179 | SFN |
| +021+ | 4.95 | Bill McGee | 157 | SLN |
| +023+ | 4.65 | Red Ruffing | 179 | NYA |
| +025+ | 4.43 | Lefty Grove | 157.7 | BOS |
| +026+ | 4.38 | Dutch Leonard | 171 | MIN |
| +030+ | 4.21 | Russ Bauers | 176.3 | PIT |
| +033+ | 3.86 | Freddie Fitzsimmons | 145.7 | LAN |
| +035+ | 3.69 | Bob Weiland | 178.3 | SLN |
| +037+ | 3.53 | Lon Warneke | 149 | SLN |
| +039+ | 3.51 | Larry French | 183.3 | CHN |
| +041+ | 3.42 | Jim Tobin | 174.7 | PIT |
| +043+ | 3.23 | Tot Pressnell | 160.3 | LAN |
| +045+ | 3.2 | Ira Hutchinson | 106 | ATL |
| +047+ | 3.1 | Clay Bryant | 181.3 | CHN |
| +049+ | 2.88 | Dizzy Dean | 54.3 | CHN |
| +050+ | 2.84 | Bill Lohrman | 96.3 | SFN |
| +052+ | 2.74 | Cliff Melton | 182 | SFN |
| +051+ | 2.74 | Cy Blanton | 122.7 | PIT |
| +053+ | 2.71 | Thornton Lee | 167 | CHA |
| +054+ | 2.71 | Bob Klinger | 118 | PIT |
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