| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 10.38 | 196309060_LAN_SFN |
| Bob Friend | PIT | 7.48 | 196309040_PIT_ATL |
| Gary Peters | CHA | 6.8 | 196309050_OAK_CHA |
| Jim Bouton | NYA | 2.79 | 196309040_TEX_NYA |
| Warren Spahn | ATL | 2.48 | 196309040_PIT_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dave Wickersham | OAK | -2 | 196309060_OAK_ANA |
| Dick Donovan | CLE | -1.79 | 196309060_CLE_TEX |
| Bennie Daniels | TEX | -1.71 | 196309060_CLE_TEX |
| Al Jackson | NYN | -1.66 | 196309060_NYN_CIN |
| Mike McCormick | BAL | -1.13 | 196309062_BOS_BAL |
Based on accumulated WAA for this season up to 1963-09-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 9.4 | Sandy Koufax | 273.3 | LAN |
| +003+ | 8.16 | Dick Ellsworth | 249.7 | CHN |
| +004+ | 8.05 | Gary Peters | 214.7 | CHA |
| +005+ | 7.91 | Bob Friend | 243 | PIT |
| +011+ | 6.06 | Juan Marichal | 268 | SFN |
| +012+ | 5.94 | Larry Jackson | 240.3 | CHN |
| +017+ | 5.35 | Juan Pizarro | 215 | CHA |
| +019+ | 5.08 | Warren Spahn | 218.7 | ATL |
| +022+ | 4.82 | Camilo Pascual | 205.7 | MIN |
| +023+ | 4.81 | Steve Barber | 234.3 | BAL |
| +024+ | 4.81 | Jim O'Toole | 226.3 | CIN |
| +025+ | 4.79 | Don Drysdale | 278.7 | LAN |
| +029+ | 4.67 | Jim Bouton | 220.3 | NYA |
| +035+ | 4.07 | Jim Maloney | 212.3 | CIN |
| +037+ | 3.8 | Joe Nuxhall | 181 | CIN |
| +040+ | 3.64 | Al Downing | 145.7 | NYA |
| +043+ | 3.54 | Curt Simmons | 201.3 | SLN |
| +046+ | 3.31 | Denny Lemaster | 207 | ATL |
| +053+ | 3.11 | Bob Veale | 48.3 | PIT |
| +061+ | 2.94 | Lee Stange | 126 | MIN |
| +065+ | 2.81 | Whitey Ford | 236.3 | NYA |
| +067+ | 2.76 | Tom Cheney | 136.7 | TEX |
| +068+ | 2.68 | Milt Pappas | 203 | BAL |
| +071+ | 2.6 | Ray Culp | 182 | PHI |
| +073+ | 2.55 | Bob Shaw | 142.3 | ATL |
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