| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bobo Newsom | BAL | -2.16 | 193809140_OAK_BAL |
| Buck Ross | OAK | -1.24 | 193809151_OAK_CHA |
| Slick Coffman | DET | -1.19 | 193809150_NYA_DET |
| Hugh Mulcahy | PHI | -0.64 | 193809162_CIN_PHI |
| Archie McKain | BOS | -0.38 | 193809160_BOS_CLE |
Based on accumulated WAA for this season up to 1938-09-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +005+ | 8.02 | Paul Derringer | 282 | CIN |
| +006+ | 7.9 | Bill Lee | 254.7 | CHN |
| +017+ | 6.42 | Lou Fette | 229 | ATL |
| +018+ | 6.42 | Freddie Fitzsimmons | 185.7 | LAN |
| +022+ | 5.66 | Red Ruffing | 227.3 | NYA |
| +024+ | 5.58 | Johnny Vander Meer | 195.3 | CIN |
| +025+ | 5.38 | Thornton Lee | 218.3 | CHA |
| +026+ | 5.3 | Danny MacFayden | 196.3 | ATL |
| +027+ | 5.25 | Clay Bryant | 236.3 | CHN |
| +028+ | 5.22 | Bill McGee | 203.7 | SLN |
| +029+ | 4.96 | Carl Hubbell | 179 | SFN |
| +032+ | 4.8 | Charlie Root | 142.3 | CHN |
| +033+ | 4.77 | Russ Bauers | 215 | PIT |
| +034+ | 4.7 | Dutch Leonard | 213.3 | MIN |
| +044+ | 4.07 | Bob Klinger | 136.7 | PIT |
| +045+ | 4.06 | Ira Hutchinson | 132.7 | ATL |
| +047+ | 3.67 | Jim Tobin | 212.3 | PIT |
| +049+ | 3.45 | Jim Turner | 239.3 | ATL |
| +050+ | 3.37 | Lefty Gomez | 219 | NYA |
| +053+ | 3.05 | Johnny Rigney | 143 | CHA |
| +055+ | 3.02 | Lon Warneke | 187.7 | SLN |
| +056+ | 3.01 | Dick Errickson | 111.3 | ATL |
| +057+ | 3 | Bob Weiland | 215.3 | SLN |
| +060+ | 2.9 | Al Benton | 76 | DET |
| +061+ | 2.81 | Luke Hamlin | 216.7 | LAN |
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