| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 11.07 | 196309021_HOU_LAN |
| Dick Ellsworth | CHN | 9.08 | 196309021_CHN_SFN |
| Gary Peters | CHA | 7.51 | 196309021_ANA_CHA |
| Bob Friend | PIT | 7.48 | 196309040_PIT_ATL |
| Juan Marichal | SFN | 4.34 | 196309030_CHN_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jay Hook | NYN | -6.27 | 196309022_CIN_NYN |
| Barry Latman | CLE | -3.31 | 196309022_TEX_CLE |
| Ray Sadecki | SLN | -2.58 | 196309030_PIT_SLN |
| Jim Bunning | DET | -2.36 | 196309030_NYA_DET |
| Dave Wickersham | OAK | -1.44 | 196309021_OAK_MIN |
Based on accumulated WAA for this season up to 1963-09-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 9.2 | Sandy Koufax | 265.3 | LAN |
| +003+ | 8.16 | Dick Ellsworth | 249.7 | CHN |
| +004+ | 7.92 | Bob Friend | 243 | PIT |
| +005+ | 7.55 | Gary Peters | 205.7 | CHA |
| +011+ | 6.1 | Juan Marichal | 268 | SFN |
| +012+ | 5.94 | Larry Jackson | 240.3 | CHN |
| +016+ | 5.37 | Juan Pizarro | 215 | CHA |
| +019+ | 5.1 | Warren Spahn | 218.7 | ATL |
| +021+ | 4.84 | Camilo Pascual | 205.7 | MIN |
| +023+ | 4.83 | Jim O'Toole | 226.3 | CIN |
| +022+ | 4.83 | Steve Barber | 234.3 | BAL |
| +025+ | 4.81 | Don Drysdale | 278.7 | LAN |
| +026+ | 4.73 | Jim Bouton | 220.3 | NYA |
| +035+ | 4.09 | Jim Maloney | 212.3 | CIN |
| +037+ | 3.82 | Joe Nuxhall | 181 | CIN |
| +039+ | 3.68 | Al Downing | 145.7 | NYA |
| +043+ | 3.32 | Denny Lemaster | 207 | ATL |
| +050+ | 3.05 | Milt Pappas | 197 | BAL |
| +058+ | 2.95 | Lee Stange | 126 | MIN |
| +064+ | 2.81 | Curt Simmons | 192.3 | SLN |
| +065+ | 2.79 | Tom Cheney | 136.7 | TEX |
| +068+ | 2.62 | Ray Culp | 182 | PHI |
| +072+ | 2.53 | Don Cardwell | 197.7 | PIT |
| +074+ | 2.48 | Ken McBride | 239.7 | ANA |
| +079+ | 2.42 | Billy O'Dell | 188.7 | SFN |
_