| Starter | Tm | Tier | Game |
|---|---|---|---|
| Larry Jackson | CHN | 6.8 | 196308181_CHN_CIN |
| Juan Pizarro | CHA | 3.78 | 196308200_CHA_BOS |
| Don Drysdale | LAN | 2.81 | 196308181_LAN_NYN |
| Jim Bouton | NYA | 2.53 | 196308182_NYA_CHA |
| Warren Spahn | ATL | 2.22 | 196308180_HOU_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dick Donovan | CLE | -2.26 | 196308200_CLE_NYA |
| Galen Cisco | NYN | -2.13 | 196308190_NYN_PHI |
| Jim Duckworth | TEX | -2.13 | 196308202_TEX_OAK |
| Dave Wickersham | OAK | -1.2 | 196308180_BAL_OAK |
| Lew Burdette | SLN | -0.76 | 196308200_SLN_LAN |
Based on accumulated WAA for this season up to 1963-08-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 7.97 | Dick Ellsworth | 219.3 | CHN |
| +003+ | 7.48 | Sandy Koufax | 226.7 | LAN |
| +005+ | 7.03 | Larry Jackson | 220.7 | CHN |
| +006+ | 6.87 | Bob Friend | 216 | PIT |
| +008+ | 6.74 | Juan Marichal | 237.3 | SFN |
| +010+ | 6.18 | Gary Peters | 171.3 | CHA |
| +015+ | 5.03 | Juan Pizarro | 199 | CHA |
| +017+ | 4.92 | Steve Barber | 207.7 | BAL |
| +020+ | 4.52 | Jim Maloney | 192.7 | CIN |
| +023+ | 4.27 | Don Drysdale | 246.7 | LAN |
| +029+ | 3.89 | Jim Bouton | 186 | NYA |
| +036+ | 3.5 | Joe Nuxhall | 162.3 | CIN |
| +037+ | 3.46 | Warren Spahn | 182.7 | ATL |
| +038+ | 3.44 | Camilo Pascual | 168.7 | MIN |
| +041+ | 3.36 | Jim O'Toole | 196.3 | CIN |
| +039+ | 3.36 | Ken McBride | 222 | ANA |
| +051+ | 2.99 | John Buzhardt | 126.3 | CHA |
| +053+ | 2.92 | Milt Pappas | 172.7 | BAL |
| +058+ | 2.65 | Billy O'Dell | 168.3 | SFN |
| +060+ | 2.59 | Tom Cheney | 135 | TEX |
| +059+ | 2.59 | Turk Farrell | 150.7 | HOU |
| +069+ | 2.36 | Denny Lemaster | 187.3 | ATL |
| +078+ | 2.21 | Ray Culp | 167 | PHI |
| +080+ | 2.19 | Dick Stigman | 181.7 | MIN |
| +082+ | 2.16 | Cal McLish | 189.7 | PHI |
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