| Starter | Tm | Tier | Game |
|---|---|---|---|
| Herm Wehmeier | CIN | -3.99 | 194809240_CIN_PIT |
| Bill Kennedy | BAL | -2.56 | 194809250_CHA_BAL |
| Al Gettel | CHA | -0.94 | 194809240_CHA_BAL |
| Jack Kramer | BOS | -0.81 | 194809250_BOS_NYA |
| Howie Pollet | SLN | -0.36 | 194809250_SLN_CHN |
Based on accumulated WAA for this season up to 1948-09-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 9.95 | Johnny Sain | 300.7 | ATL |
| +005+ | 9.71 | Harry Brecheen | 224 | SLN |
| +009+ | 8.69 | Johnny Schmitz | 242 | CHN |
| +010+ | 8.61 | Dutch Leonard | 225.7 | PHI |
| +011+ | 8.25 | Bob Lemon | 285.3 | CLE |
| +018+ | 6.32 | Gene Bearden | 202.7 | CLE |
| +021+ | 5.59 | Hal Newhouser | 246.3 | DET |
| +022+ | 5.45 | Mel Parnell | 202.3 | BOS |
| +023+ | 5.22 | Preacher Roe | 169.3 | LAN |
| +025+ | 4.98 | Rex Barney | 233 | LAN |
| +031+ | 4.42 | Ray Scarborough | 167.3 | MIN |
| +035+ | 4.23 | Joe Dobson | 239.7 | BOS |
| +034+ | 4.23 | Robin Roberts | 141.3 | PHI |
| +038+ | 3.83 | Johnny Vander Meer | 215 | CIN |
| +039+ | 3.8 | Steve Gromek | 127 | CLE |
| +041+ | 3.63 | Warren Spahn | 245 | ATL |
| +044+ | 3.52 | Sheldon Jones | 200.3 | SFN |
| +047+ | 3.29 | Larry Jansen | 270 | SFN |
| +049+ | 3.1 | Dizzy Trout | 181 | DET |
| +051+ | 3.07 | Joe Hatten | 206.3 | LAN |
| +053+ | 2.84 | Elmer Riddle | 191 | PIT |
| +054+ | 2.82 | Bob Chesnes | 186.3 | PIT |
| +056+ | 2.8 | Tommy Byrne | 122.3 | NYA |
| +058+ | 2.78 | Nels Potter | 104.3 | TOT |
| +059+ | 2.71 | Bob Feller | 260 | CLE |
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