| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Friend | PIT | 7.98 | 196308220_PIT_CHN |
| Larry Jackson | CHN | 7.28 | 196308220_PIT_CHN |
| Juan Marichal | SFN | 6.96 | 196308220_ATL_SFN |
| Don Drysdale | LAN | 3.28 | 196308220_SLN_LAN |
| Warren Spahn | ATL | 2.33 | 196308230_ATL_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tracy Stallard | NYN | -2.41 | 196308230_NYN_CHN |
| Dick Donovan | CLE | -1.83 | 196308240_BOS_CLE |
| Bennie Daniels | TEX | -1.67 | 196308220_TEX_OAK |
| Dave Wickersham | OAK | -1.32 | 196308232_OAK_DET |
| Dave Morehead | BOS | -1.29 | 196308220_CHA_BOS |
Based on accumulated WAA for this season up to 1963-08-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 8.17 | Sandy Koufax | 238.7 | LAN |
| +003+ | 7.49 | Dick Ellsworth | 225.7 | CHN |
| +007+ | 6.9 | Larry Jackson | 228.7 | CHN |
| +008+ | 6.8 | Bob Friend | 222 | PIT |
| +009+ | 6.78 | Gary Peters | 180.3 | CHA |
| +011+ | 6.22 | Juan Marichal | 246.3 | SFN |
| +013+ | 5.13 | Juan Pizarro | 199 | CHA |
| +020+ | 4.6 | Steve Barber | 213.3 | BAL |
| +025+ | 4.25 | Jim Bouton | 195 | NYA |
| +026+ | 4.18 | Ken McBride | 231 | ANA |
| +027+ | 4.16 | Don Drysdale | 254 | LAN |
| +029+ | 4.04 | Warren Spahn | 191.7 | ATL |
| +030+ | 4.03 | Camilo Pascual | 177.7 | MIN |
| +037+ | 3.76 | Jim O'Toole | 203.3 | CIN |
| +039+ | 3.53 | Joe Nuxhall | 162.3 | CIN |
| +044+ | 3.39 | Jim Maloney | 196.3 | CIN |
| +049+ | 3.05 | John Buzhardt | 126.3 | CHA |
| +052+ | 2.96 | Curt Simmons | 181.3 | SLN |
| +056+ | 2.85 | Milt Pappas | 181.7 | BAL |
| +061+ | 2.71 | Tom Cheney | 136 | TEX |
| +062+ | 2.7 | Denny Lemaster | 193.3 | ATL |
| +073+ | 2.44 | Turk Farrell | 158.7 | HOU |
| +074+ | 2.43 | Al Downing | 121.7 | NYA |
| +076+ | 2.38 | Billy O'Dell | 172.7 | SFN |
| +078+ | 2.32 | Carl Willey | 142 | NYN |
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