| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 12.65 | 196308110_LAN_CIN |
| Juan Marichal | SFN | 6.67 | 196308090_SFN_PHI |
| Dick Ellsworth | CHN | 6.02 | 196308111_CHN_NYN |
| Juan Pizarro | CHA | 5.05 | 196308111_DET_CHA |
| Jim O'Toole | CIN | 3.97 | 196308110_LAN_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tracy Stallard | NYN | -2.28 | 196308112_CHN_NYN |
| Bennie Daniels | TEX | -1.72 | 196308100_BAL_TEX |
| Barry Latman | CLE | -1.44 | 196308110_OAK_CLE |
| Dave McNally | BAL | -1.25 | 196308090_BAL_TEX |
| Lew Burdette | SLN | -0.76 | 196308100_SLN_ATL |
Based on accumulated WAA for this season up to 1963-08-11.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 7.81 | Sandy Koufax | 218.3 | LAN |
| +003+ | 7.37 | Dick Ellsworth | 210.3 | CHN |
| +004+ | 7.25 | Juan Marichal | 223.3 | SFN |
| +005+ | 6.9 | Bob Friend | 203.7 | PIT |
| +006+ | 6.76 | Larry Jackson | 208 | CHN |
| +011+ | 5.47 | Gary Peters | 162.3 | CHA |
| +013+ | 4.86 | Juan Pizarro | 181 | CHA |
| +014+ | 4.65 | Jim O'Toole | 191.3 | CIN |
| +021+ | 4.11 | Ken McBride | 215.7 | ANA |
| +024+ | 3.98 | Steve Barber | 190.7 | BAL |
| +026+ | 3.86 | Jim Bouton | 170.7 | NYA |
| +027+ | 3.77 | Milt Pappas | 170 | BAL |
| +028+ | 3.67 | Camilo Pascual | 160.7 | MIN |
| +034+ | 3.44 | Jim Maloney | 176.7 | CIN |
| +035+ | 3.43 | Joe Nuxhall | 151 | CIN |
| +045+ | 3.08 | Dick Stigman | 174 | MIN |
| +047+ | 3.05 | Warren Spahn | 164.7 | ATL |
| +050+ | 3 | John Buzhardt | 126.3 | CHA |
| +052+ | 2.96 | Don Drysdale | 231 | LAN |
| +051+ | 2.96 | Johnny Podres | 150.7 | LAN |
| +058+ | 2.61 | Billy O'Dell | 168.3 | SFN |
| +059+ | 2.6 | Tom Cheney | 135 | TEX |
| +061+ | 2.51 | Don Schwall | 129 | PIT |
| +062+ | 2.5 | Turk Farrell | 134.7 | HOU |
| +067+ | 2.47 | Ray Culp | 162 | PHI |
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