| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 10.07 | 196308210_SLN_LAN |
| Dick Ellsworth | CHN | 8.69 | 196308210_PIT_CHN |
| Gary Peters | CHA | 5.63 | 196308210_CHA_BOS |
| Steve Barber | BAL | 3.62 | 196308211_ANA_BAL |
| Camilo Pascual | MIN | 2.22 | 196308210_MIN_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dick Donovan | CLE | -2.26 | 196308200_CLE_NYA |
| Jim Duckworth | TEX | -2.13 | 196308202_TEX_OAK |
| Galen Cisco | NYN | -2.13 | 196308190_NYN_PHI |
| Jim Bunning | DET | -1.21 | 196308210_MIN_DET |
| Mike McCormick | BAL | -1.01 | 196308212_ANA_BAL |
Based on accumulated WAA for this season up to 1963-08-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 8.11 | Sandy Koufax | 238.7 | LAN |
| +003+ | 7.42 | Dick Ellsworth | 225.7 | CHN |
| +005+ | 7.02 | Larry Jackson | 220.7 | CHN |
| +006+ | 6.85 | Bob Friend | 216 | PIT |
| +008+ | 6.73 | Juan Marichal | 237.3 | SFN |
| +009+ | 6.68 | Gary Peters | 180.3 | CHA |
| +014+ | 5.02 | Juan Pizarro | 199 | CHA |
| +019+ | 4.53 | Steve Barber | 213.3 | BAL |
| +020+ | 4.52 | Jim Maloney | 192.7 | CIN |
| +025+ | 4.13 | Don Drysdale | 246.7 | LAN |
| +030+ | 3.95 | Camilo Pascual | 177.7 | MIN |
| +031+ | 3.88 | Jim Bouton | 186 | NYA |
| +032+ | 3.72 | Jim O'Toole | 203.3 | CIN |
| +036+ | 3.5 | Joe Nuxhall | 162.3 | CIN |
| +039+ | 3.45 | Warren Spahn | 182.7 | ATL |
| +041+ | 3.37 | Ken McBride | 222 | ANA |
| +052+ | 2.98 | John Buzhardt | 126.3 | CHA |
| +053+ | 2.91 | Milt Pappas | 172.7 | BAL |
| +055+ | 2.89 | Curt Simmons | 181.3 | SLN |
| +061+ | 2.64 | Billy O'Dell | 168.3 | SFN |
| +064+ | 2.58 | Tom Cheney | 135 | TEX |
| +062+ | 2.58 | Turk Farrell | 150.7 | HOU |
| +070+ | 2.39 | Al Downing | 121.7 | NYA |
| +071+ | 2.35 | Denny Lemaster | 187.3 | ATL |
| +084+ | 2.2 | Ray Culp | 167 | PHI |
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