| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 12.65 | 196308110_LAN_CIN |
| Bob Friend | PIT | 8.08 | 196308120_HOU_PIT |
| Juan Marichal | SFN | 7.81 | 196308130_SFN_CIN |
| Dick Ellsworth | CHN | 6.02 | 196308111_CHN_NYN |
| Juan Pizarro | CHA | 5.05 | 196308111_DET_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tracy Stallard | NYN | -2.28 | 196308112_CHN_NYN |
| Jim Bunning | DET | -1.76 | 196308130_DET_OAK |
| Barry Latman | CLE | -1.44 | 196308110_OAK_CLE |
| Dave Wickersham | OAK | -1.27 | 196308130_DET_OAK |
| Tony Cloninger | ATL | -0.38 | 196308110_SLN_ATL |
Based on accumulated WAA for this season up to 1963-08-13.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 7.78 | Sandy Koufax | 218.3 | LAN |
| +003+ | 7.32 | Dick Ellsworth | 210.3 | CHN |
| +004+ | 7.29 | Bob Friend | 211.7 | PIT |
| +005+ | 6.96 | Juan Marichal | 230.3 | SFN |
| +006+ | 6.72 | Larry Jackson | 208 | CHN |
| +011+ | 5.43 | Gary Peters | 162.3 | CHA |
| +014+ | 4.83 | Juan Pizarro | 181 | CHA |
| +017+ | 4.61 | Jim O'Toole | 191.3 | CIN |
| +020+ | 4.46 | Steve Barber | 199.7 | BAL |
| +024+ | 4.14 | Jim Maloney | 185.7 | CIN |
| +025+ | 4.06 | Ken McBride | 215.7 | ANA |
| +027+ | 3.83 | Jim Bouton | 170.7 | NYA |
| +028+ | 3.73 | Milt Pappas | 170 | BAL |
| +030+ | 3.63 | Camilo Pascual | 160.7 | MIN |
| +034+ | 3.39 | Joe Nuxhall | 151 | CIN |
| +043+ | 3.11 | Warren Spahn | 173.7 | ATL |
| +048+ | 2.98 | Dick Stigman | 181 | MIN |
| +049+ | 2.97 | John Buzhardt | 126.3 | CHA |
| +050+ | 2.93 | Don Drysdale | 231 | LAN |
| +056+ | 2.61 | Billy O'Dell | 168.3 | SFN |
| +057+ | 2.58 | Tom Cheney | 135 | TEX |
| +062+ | 2.48 | Don Schwall | 129 | PIT |
| +064+ | 2.44 | Ray Culp | 162 | PHI |
| +068+ | 2.34 | Johnny Podres | 151 | LAN |
| +071+ | 2.3 | Turk Farrell | 142.7 | HOU |
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