| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 10.07 | 196308210_SLN_LAN |
| Dick Ellsworth | CHN | 8.69 | 196308210_PIT_CHN |
| Bob Friend | PIT | 7.98 | 196308220_PIT_CHN |
| Juan Marichal | SFN | 6.96 | 196308220_ATL_SFN |
| Gary Peters | CHA | 5.63 | 196308210_CHA_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tracy Stallard | NYN | -2.41 | 196308230_NYN_CHN |
| Barry Latman | CLE | -2.07 | 196308212_CLE_NYA |
| 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 1963-08-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 8.2 | Sandy Koufax | 238.7 | LAN |
| +003+ | 7.52 | Dick Ellsworth | 225.7 | CHN |
| +006+ | 6.93 | Larry Jackson | 228.7 | CHN |
| +007+ | 6.83 | Bob Friend | 222 | PIT |
| +008+ | 6.79 | Gary Peters | 180.3 | CHA |
| +010+ | 6.31 | Juan Marichal | 246.3 | SFN |
| +013+ | 5.14 | Juan Pizarro | 199 | CHA |
| +020+ | 4.63 | Steve Barber | 213.3 | BAL |
| +023+ | 4.28 | Jim Bouton | 195 | NYA |
| +026+ | 4.22 | Ken McBride | 231 | ANA |
| +027+ | 4.2 | Don Drysdale | 254 | LAN |
| +030+ | 4.06 | Warren Spahn | 191.7 | ATL |
| +031+ | 4.06 | Camilo Pascual | 177.7 | MIN |
| +036+ | 3.83 | Jim O'Toole | 203.3 | CIN |
| +039+ | 3.58 | Joe Nuxhall | 162.3 | CIN |
| +043+ | 3.46 | Jim Maloney | 196.3 | CIN |
| +048+ | 3.06 | John Buzhardt | 126.3 | CHA |
| +054+ | 2.97 | Curt Simmons | 181.3 | SLN |
| +055+ | 2.88 | Milt Pappas | 181.7 | BAL |
| +060+ | 2.73 | Tom Cheney | 136 | TEX |
| +062+ | 2.72 | Billy O'Dell | 168.3 | SFN |
| +071+ | 2.47 | Turk Farrell | 158.7 | HOU |
| +072+ | 2.46 | Denny Lemaster | 187.3 | ATL |
| +073+ | 2.45 | Al Downing | 121.7 | NYA |
| +079+ | 2.28 | Ray Culp | 167 | PHI |
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