| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jay Hook | NYN | -5.36 | 196309220_NYN_SFN |
| Dave Wickersham | OAK | -2.83 | 196309220_OAK_NYA |
| Bo Belinsky | ANA | -1.8 | 196309240_ANA_NYA |
| Bennie Daniels | TEX | -1.68 | 196309230_TEX_DET |
| Jim Bunning | DET | -1.63 | 196309240_TEX_DET |
Based on accumulated WAA for this season up to 1963-09-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 10.81 | Sandy Koufax | 306 | LAN |
| +005+ | 8.83 | Dick Ellsworth | 281.7 | CHN |
| +008+ | 7.55 | Gary Peters | 233.7 | CHA |
| +012+ | 7.14 | Juan Marichal | 312 | SFN |
| +013+ | 7.06 | Bob Friend | 268.3 | PIT |
| +017+ | 6.15 | Larry Jackson | 269.3 | CHN |
| +018+ | 5.7 | Camilo Pascual | 239.3 | MIN |
| +021+ | 5.57 | Don Drysdale | 311.3 | LAN |
| +023+ | 5.29 | Curt Simmons | 232.3 | SLN |
| +026+ | 5.05 | Jim Bouton | 242.3 | NYA |
| +028+ | 4.68 | Whitey Ford | 266.3 | NYA |
| +030+ | 4.56 | Warren Spahn | 241 | ATL |
| +032+ | 4.41 | Steve Barber | 259 | BAL |
| +037+ | 4.1 | Al Downing | 170.7 | NYA |
| +038+ | 4.04 | Joe Nuxhall | 208.3 | CIN |
| +040+ | 3.99 | Jim Maloney | 243.7 | CIN |
| +042+ | 3.87 | Jim O'Toole | 229.3 | CIN |
| +047+ | 3.78 | Ken Johnson | 214.7 | HOU |
| +048+ | 3.7 | Bob Veale | 69 | PIT |
| +062+ | 3.06 | Lee Stange | 157.3 | MIN |
| +065+ | 2.98 | Ray Culp | 203.3 | PHI |
| +073+ | 2.68 | Bob Shaw | 157 | ATL |
| +083+ | 2.42 | Milt Pappas | 216.3 | BAL |
| +085+ | 2.39 | Ernie Broglio | 238 | SLN |
| +086+ | 2.37 | Hoyt Wilhelm | 134.7 | CHA |
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