| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 13.61 | 196309210_PIT_LAN |
| Bob Friend | PIT | 5.47 | 196309210_PIT_LAN |
| Larry Jackson | CHN | 4.22 | 196309210_ATL_CHN |
| Camilo Pascual | MIN | 2.77 | 196309220_MIN_BOS |
| Curt Simmons | SLN | 2.6 | 196309220_SLN_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jay Hook | NYN | -5.36 | 196309220_NYN_SFN |
| Dave Wickersham | OAK | -2.83 | 196309220_OAK_NYA |
| Bennie Daniels | TEX | -1.68 | 196309230_TEX_DET |
| Gene Conley | BOS | -1.35 | 196309212_MIN_BOS |
| Phil Regan | DET | -0.25 | 196309230_TEX_DET |
Based on accumulated WAA for this season up to 1963-09-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 10.84 | Sandy Koufax | 306 | LAN |
| +005+ | 8.85 | Dick Ellsworth | 281.7 | CHN |
| +008+ | 7.57 | Gary Peters | 233.7 | CHA |
| +009+ | 7.36 | Juan Marichal | 304 | SFN |
| +013+ | 7.06 | Bob Friend | 268.3 | PIT |
| +017+ | 6.18 | Larry Jackson | 269.3 | CHN |
| +018+ | 5.71 | Camilo Pascual | 239.3 | MIN |
| +021+ | 5.3 | Curt Simmons | 232.3 | SLN |
| +023+ | 5.22 | Don Drysdale | 304 | LAN |
| +025+ | 5.07 | Jim Bouton | 242.3 | NYA |
| +027+ | 4.92 | Steve Barber | 254.7 | BAL |
| +030+ | 4.58 | Warren Spahn | 241 | ATL |
| +036+ | 4.13 | Whitey Ford | 259.3 | NYA |
| +037+ | 4.12 | Al Downing | 170.7 | NYA |
| +038+ | 4.06 | Joe Nuxhall | 208.3 | CIN |
| +039+ | 3.89 | Jim O'Toole | 229.3 | CIN |
| +042+ | 3.86 | Jim Maloney | 236.7 | CIN |
| +043+ | 3.8 | Ken Johnson | 214.7 | HOU |
| +047+ | 3.71 | Bob Veale | 69 | PIT |
| +063+ | 3.06 | Lee Stange | 157.3 | MIN |
| +064+ | 2.99 | Ray Culp | 203.3 | PHI |
| +076+ | 2.59 | Denny Lemaster | 226.7 | ATL |
| +079+ | 2.53 | Bob Shaw | 155 | ATL |
| +082+ | 2.44 | Milt Pappas | 216.3 | BAL |
| +084+ | 2.39 | Ernie Broglio | 238 | SLN |
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