| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 13.9 | 196309250_NYN_LAN |
| Gary Peters | CHA | 6.64 | 196309250_CHA_BAL |
| Juan Marichal | SFN | 6.26 | 196309240_PHI_SFN |
| Larry Jackson | CHN | 4.08 | 196309250_SLN_CHN |
| Jim Bouton | NYA | 2.73 | 196309250_ANA_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tracy Stallard | NYN | -2.69 | 196309240_NYN_LAN |
| Bo Belinsky | ANA | -1.8 | 196309240_ANA_NYA |
| Jim Bunning | DET | -1.63 | 196309240_TEX_DET |
| Mike McCormick | BAL | -1.39 | 196309250_CHA_BAL |
| Mudcat Grant | CLE | -0.91 | 196309240_MIN_CLE |
Based on accumulated WAA for this season up to 1963-09-26.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 11.22 | Sandy Koufax | 311 | LAN |
| +005+ | 8.83 | Dick Ellsworth | 281.7 | CHN |
| +011+ | 7.14 | Juan Marichal | 312 | SFN |
| +012+ | 7.05 | Bob Friend | 268.3 | PIT |
| +013+ | 7 | Gary Peters | 239.7 | CHA |
| +017+ | 5.83 | Larry Jackson | 275.7 | CHN |
| +019+ | 5.7 | Camilo Pascual | 239.3 | MIN |
| +021+ | 5.57 | Don Drysdale | 311.3 | LAN |
| +023+ | 5.41 | Jim Bouton | 249.3 | NYA |
| +024+ | 5.29 | Curt Simmons | 232.3 | SLN |
| +028+ | 4.68 | Whitey Ford | 266.3 | NYA |
| +030+ | 4.41 | Steve Barber | 259 | BAL |
| +034+ | 4.23 | Warren Spahn | 250 | ATL |
| +035+ | 4.22 | Ken Johnson | 223 | HOU |
| +037+ | 4.1 | Al Downing | 170.7 | NYA |
| +039+ | 4.05 | Joe Nuxhall | 208.3 | CIN |
| +041+ | 4.01 | Jim Maloney | 243.7 | CIN |
| +048+ | 3.7 | Bob Veale | 69 | PIT |
| +058+ | 3.37 | Jim O'Toole | 233.3 | CIN |
| +064+ | 3.06 | Lee Stange | 157.3 | MIN |
| +071+ | 2.7 | Ernie Broglio | 247 | SLN |
| +074+ | 2.68 | Bob Shaw | 157 | ATL |
| +080+ | 2.42 | Milt Pappas | 216.3 | BAL |
| +084+ | 2.38 | Hoyt Wilhelm | 134.7 | CHA |
| +085+ | 2.36 | Ray Culp | 203.3 | PHI |
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