| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 10.38 | 196309060_LAN_SFN |
| Dick Ellsworth | CHN | 8.17 | 196309070_CHN_HOU |
| Gary Peters | CHA | 6.8 | 196309050_OAK_CHA |
| Juan Marichal | SFN | 4.24 | 196309070_LAN_SFN |
| Jim Maloney | CIN | 1.56 | 196309070_NYN_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Sadecki | SLN | -2.36 | 196309070_SLN_PIT |
| Don Rudolph | TEX | -2.13 | 196309070_CLE_TEX |
| Dave Wickersham | OAK | -2 | 196309060_OAK_ANA |
| Dick Donovan | CLE | -1.79 | 196309060_CLE_TEX |
| Tracy Stallard | NYN | -1.68 | 196309070_NYN_CIN |
Based on accumulated WAA for this season up to 1963-09-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 9.43 | Sandy Koufax | 273.3 | LAN |
| +003+ | 8.45 | Dick Ellsworth | 258.3 | CHN |
| +004+ | 8.02 | Gary Peters | 214.7 | CHA |
| +005+ | 7.91 | Bob Friend | 243 | PIT |
| +011+ | 6.38 | Juan Marichal | 277 | SFN |
| +013+ | 5.95 | Larry Jackson | 240.3 | CHN |
| +017+ | 5.32 | Juan Pizarro | 215 | CHA |
| +019+ | 5.08 | Warren Spahn | 218.7 | ATL |
| +023+ | 4.82 | Steve Barber | 234.3 | BAL |
| +024+ | 4.81 | Jim O'Toole | 226.3 | CIN |
| +026+ | 4.79 | Camilo Pascual | 205.7 | MIN |
| +028+ | 4.67 | Jim Bouton | 220.3 | NYA |
| +031+ | 4.46 | Don Drysdale | 284.7 | LAN |
| +033+ | 4.37 | Jim Maloney | 221 | CIN |
| +037+ | 3.8 | Joe Nuxhall | 181 | CIN |
| +040+ | 3.65 | Al Downing | 145.7 | NYA |
| +043+ | 3.55 | Curt Simmons | 201.3 | SLN |
| +050+ | 3.2 | Lee Stange | 134.7 | MIN |
| +054+ | 3.11 | Bob Veale | 48.3 | PIT |
| +055+ | 3.07 | Denny Lemaster | 212 | ATL |
| +059+ | 2.98 | Ray Culp | 189.3 | PHI |
| +064+ | 2.82 | Whitey Ford | 236.3 | NYA |
| +066+ | 2.76 | Tom Cheney | 136.7 | TEX |
| +070+ | 2.69 | Milt Pappas | 203 | BAL |
| +075+ | 2.55 | Bob Shaw | 142.3 | ATL |
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