| Starter | Tm | Tier | Game |
|---|---|---|---|
| Paul Derringer | CIN | 4.59 | 193809070_PIT_CIN |
| Danny MacFayden | ATL | 4.42 | 193809070_ATL_SFN |
| Red Ruffing | NYA | 3.98 | 193809070_NYA_BOS |
| Bob Weiland | SLN | 0.92 | 193809080_CHN_SLN |
| Bob Klinger | PIT | 0.8 | 193809070_PIT_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ken Chase | MIN | -2.71 | 193809080_OAK_MIN |
| Slick Coffman | DET | -1.28 | 193809070_CLE_DET |
| Hugh Mulcahy | PHI | -1.14 | 193809070_LAN_PHI |
| Bud Thomas | OAK | -1.12 | 193809080_OAK_MIN |
| Earl Whitehill | CLE | -0.79 | 193809080_DET_CLE |
Based on accumulated WAA for this season up to 1938-09-08.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +008+ | 7.12 | Bill Lee | 245.7 | CHN |
| +011+ | 6.92 | Lou Fette | 218 | ATL |
| +013+ | 6.83 | Paul Derringer | 265 | CIN |
| +016+ | 6.49 | Danny MacFayden | 184 | ATL |
| +022+ | 5.67 | Johnny Vander Meer | 189.3 | CIN |
| +024+ | 5.54 | Bill McGee | 191 | SLN |
| +025+ | 5.34 | Freddie Fitzsimmons | 167.7 | LAN |
| +027+ | 5.19 | Russ Bauers | 203.7 | PIT |
| +028+ | 5.06 | Red Ruffing | 218.3 | NYA |
| +029+ | 5.05 | Carl Hubbell | 179 | SFN |
| +030+ | 4.97 | Thornton Lee | 209.3 | CHA |
| +032+ | 4.93 | Clay Bryant | 219.3 | CHN |
| +037+ | 4.31 | Charlie Root | 128.3 | CHN |
| +039+ | 4.26 | Dutch Leonard | 195.3 | MIN |
| +043+ | 4.11 | Bob Klinger | 136.7 | PIT |
| +045+ | 3.61 | Jim Tobin | 200.3 | PIT |
| +047+ | 3.52 | Ted Lyons | 161.7 | CHA |
| +048+ | 3.39 | Lefty Gomez | 210 | NYA |
| +049+ | 3.39 | Ira Hutchinson | 121 | ATL |
| +052+ | 3.24 | Dick Errickson | 98.3 | ATL |
| +055+ | 3.05 | Bill Swift | 123.7 | PIT |
| +056+ | 3.03 | Bob Weiland | 214.7 | SLN |
| +057+ | 2.89 | Jim Turner | 230.3 | ATL |
| +058+ | 2.84 | Lon Warneke | 180.7 | SLN |
| +061+ | 2.74 | Johnny Rigney | 127 | CHA |
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