| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 11.09 | 196308150_LAN_ATL |
| Dick Ellsworth | CHN | 7.37 | 196308161_CHN_CIN |
| Juan Pizarro | CHA | 3.99 | 196308160_NYA_CHA |
| Jim O'Toole | CIN | 3.34 | 196308161_CHN_CIN |
| Camilo Pascual | MIN | 2.44 | 196308160_TEX_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dick Donovan | CLE | -2.96 | 196308140_CLE_CHA |
| Ray Sadecki | SLN | -2.57 | 196308150_HOU_SLN |
| Al Jackson | NYN | -2.35 | 196308140_PIT_NYN |
| Jim Duckworth | TEX | -1.27 | 196308160_TEX_MIN |
| Joey Jay | CIN | -1.09 | 196308162_CHN_CIN |
Based on accumulated WAA for this season up to 1963-08-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 7.98 | Dick Ellsworth | 219.3 | CHN |
| +003+ | 7.38 | Bob Friend | 211.7 | PIT |
| +004+ | 7.06 | Sandy Koufax | 218.7 | LAN |
| +005+ | 7.04 | Juan Marichal | 230.3 | SFN |
| +008+ | 6.68 | Larry Jackson | 213.7 | CHN |
| +011+ | 5.47 | Gary Peters | 162.3 | CHA |
| +016+ | 4.75 | Juan Pizarro | 190 | CHA |
| +019+ | 4.49 | Steve Barber | 199.7 | BAL |
| +020+ | 4.19 | Jim Maloney | 185.7 | CIN |
| +023+ | 4.06 | Jim Bouton | 177.7 | NYA |
| +030+ | 3.57 | Don Drysdale | 237.7 | LAN |
| +034+ | 3.45 | Camilo Pascual | 168.7 | MIN |
| +037+ | 3.39 | Ken McBride | 222 | ANA |
| +038+ | 3.39 | Jim O'Toole | 196.3 | CIN |
| +044+ | 3.18 | Warren Spahn | 173.7 | ATL |
| +049+ | 3 | John Buzhardt | 126.3 | CHA |
| +050+ | 2.98 | Dick Stigman | 181 | MIN |
| +051+ | 2.93 | Milt Pappas | 172.7 | BAL |
| +052+ | 2.92 | Joe Nuxhall | 155 | CIN |
| +057+ | 2.67 | Billy O'Dell | 168.3 | SFN |
| +059+ | 2.64 | Tom Cheney | 135 | TEX |
| +061+ | 2.59 | Turk Farrell | 150.7 | HOU |
| +069+ | 2.34 | Don Schwall | 134.3 | PIT |
| +072+ | 2.29 | Ray Culp | 164.7 | PHI |
| +081+ | 2.16 | Curt Simmons | 168.3 | SLN |
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