| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Friend | PIT | 9.3 | 196308170_PHI_PIT |
| Sandy Koufax | LAN | 9.3 | 196308170_LAN_NYN |
| Juan Marichal | SFN | 7.54 | 196308170_SFN_SLN |
| Dick Ellsworth | CHN | 7.37 | 196308161_CHN_CIN |
| Gary Peters | CHA | 4.34 | 196308170_NYA_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tracy Stallard | NYN | -2.3 | 196308170_LAN_NYN |
| Bennie Daniels | TEX | -2.29 | 196308170_TEX_MIN |
| Jim Bunning | DET | -1.52 | 196308170_DET_ANA |
| Dave Wickersham | OAK | -1.2 | 196308180_BAL_OAK |
| Joey Jay | CIN | -1.09 | 196308162_CHN_CIN |
Based on accumulated WAA for this season up to 1963-08-18.
| 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+ | 6.73 | Juan Marichal | 237.3 | SFN |
| +010+ | 6.18 | Gary Peters | 171.3 | CHA |
| +015+ | 4.93 | Steve Barber | 207.7 | BAL |
| +018+ | 4.73 | Juan Pizarro | 190 | CHA |
| +020+ | 4.53 | Jim Maloney | 192.7 | CIN |
| +022+ | 4.27 | Don Drysdale | 246.7 | LAN |
| +029+ | 3.89 | Jim Bouton | 186 | NYA |
| +035+ | 3.46 | Warren Spahn | 182.7 | ATL |
| +036+ | 3.43 | Camilo Pascual | 168.7 | MIN |
| +038+ | 3.37 | Ken McBride | 222 | ANA |
| +039+ | 3.36 | Jim O'Toole | 196.3 | CIN |
| +049+ | 2.99 | John Buzhardt | 126.3 | CHA |
| +052+ | 2.92 | Joe Nuxhall | 155.3 | CIN |
| +053+ | 2.92 | Milt Pappas | 172.7 | BAL |
| +058+ | 2.64 | Billy O'Dell | 168.3 | SFN |
| +059+ | 2.63 | Tom Cheney | 135 | TEX |
| +061+ | 2.6 | Turk Farrell | 150.7 | HOU |
| +067+ | 2.36 | Denny Lemaster | 187.3 | ATL |
| +076+ | 2.25 | Ray Culp | 167 | PHI |
| +079+ | 2.18 | Dick Stigman | 181.7 | MIN |
| +083+ | 2.13 | Curt Simmons | 168.3 | SLN |
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