| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Friend | PIT | 6.98 | 196308270_NYN_PIT |
| Larry Jackson | CHN | 6.49 | 196308270_PHI_CHN |
| Juan Marichal | SFN | 5.37 | 196308260_SLN_SFN |
| Juan Pizarro | CHA | 3.51 | 196308281_CHA_CLE |
| Don Drysdale | LAN | 2.87 | 196308260_CIN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Al Jackson | NYN | -1.77 | 196308280_NYN_PIT |
| Dick Donovan | CLE | -1.57 | 196308282_CHA_CLE |
| Dave Wickersham | OAK | -1.46 | 196308280_OAK_BAL |
| Steve Ridzik | TEX | -1.41 | 196308262_MIN_TEX |
| Dave Morehead | BOS | -0.93 | 196308272_BOS_NYA |
Based on accumulated WAA for this season up to 1963-08-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 8.61 | Sandy Koufax | 247.3 | LAN |
| +003+ | 7.96 | Dick Ellsworth | 234.7 | CHN |
| +005+ | 7.47 | Gary Peters | 192.3 | CHA |
| +006+ | 7.46 | Bob Friend | 231 | PIT |
| +010+ | 6.78 | Larry Jackson | 235.7 | CHN |
| +012+ | 5.83 | Juan Marichal | 255 | SFN |
| +015+ | 5.3 | Juan Pizarro | 215 | CHA |
| +018+ | 4.9 | Jim Bouton | 204 | NYA |
| +021+ | 4.6 | Camilo Pascual | 187.7 | MIN |
| +022+ | 4.54 | Steve Barber | 221.3 | BAL |
| +027+ | 4.32 | Warren Spahn | 200.7 | ATL |
| +029+ | 4.25 | Jim O'Toole | 212.3 | CIN |
| +031+ | 4.12 | Don Drysdale | 262 | LAN |
| +035+ | 3.83 | Ken McBride | 237 | ANA |
| +044+ | 3.31 | Milt Pappas | 190.7 | BAL |
| +045+ | 3.3 | Jim Maloney | 203.3 | CIN |
| +048+ | 3.11 | Al Downing | 130.7 | NYA |
| +055+ | 3.01 | John Buzhardt | 126.3 | CHA |
| +063+ | 2.74 | Tom Cheney | 136.7 | TEX |
| +064+ | 2.68 | Denny Lemaster | 193.3 | ATL |
| +066+ | 2.61 | Joe Nuxhall | 164.3 | CIN |
| +072+ | 2.49 | Curt Simmons | 183.3 | SLN |
| +073+ | 2.45 | Billy O'Dell | 181.7 | SFN |
| +077+ | 2.31 | Carl Willey | 142 | NYN |
| +078+ | 2.24 | Cal McLish | 190.7 | PHI |
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