| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Friend | PIT | 7.65 | 196308310_CIN_PIT |
| Larry Jackson | CHN | 5.85 | 196308310_HOU_CHN |
| Juan Marichal | SFN | 4.35 | 196308300_SFN_LAN |
| Camilo Pascual | MIN | 2.9 | 196308300_CHA_MIN |
| Jim Bouton | NYA | 2.81 | 196308310_NYA_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tracy Stallard | NYN | -2.24 | 196308300_ATL_NYN |
| Ray Sadecki | SLN | -1.96 | 196308300_SLN_PHI |
| Bennie Daniels | TEX | -1.93 | 196309010_TEX_BOS |
| Jim Bunning | DET | -1.92 | 196308300_DET_CLE |
| Dick Donovan | CLE | -1.74 | 196309011_DET_CLE |
Based on accumulated WAA for this season up to 1963-09-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 9.13 | Sandy Koufax | 256.3 | LAN |
| +003+ | 8.52 | Dick Ellsworth | 243.7 | CHN |
| +004+ | 7.83 | Gary Peters | 201.3 | CHA |
| +005+ | 7.49 | Bob Friend | 236 | PIT |
| +010+ | 6.1 | Larry Jackson | 237 | CHN |
| +012+ | 5.94 | Juan Marichal | 261 | SFN |
| +015+ | 5.36 | Juan Pizarro | 215 | CHA |
| +018+ | 4.95 | Jim Bouton | 212 | NYA |
| +021+ | 4.78 | Jim O'Toole | 218.3 | CIN |
| +022+ | 4.73 | Camilo Pascual | 196.7 | MIN |
| +025+ | 4.65 | Steve Barber | 227.3 | BAL |
| +026+ | 4.64 | Don Drysdale | 271 | LAN |
| +029+ | 4.36 | Warren Spahn | 209.7 | ATL |
| +038+ | 3.66 | Al Downing | 139.7 | NYA |
| +041+ | 3.34 | Milt Pappas | 190.7 | BAL |
| +042+ | 3.34 | Jim Maloney | 203.3 | CIN |
| +049+ | 3.1 | Ken McBride | 237.3 | ANA |
| +052+ | 3.06 | Joe Nuxhall | 172 | CIN |
| +058+ | 2.96 | Denny Lemaster | 200 | ATL |
| +061+ | 2.81 | Curt Simmons | 192.3 | SLN |
| +064+ | 2.77 | Tom Cheney | 136.7 | TEX |
| +072+ | 2.47 | Don Cardwell | 197.7 | PIT |
| +075+ | 2.42 | Billy O'Dell | 188.7 | SFN |
| +074+ | 2.42 | Lee Stange | 117 | MIN |
| +080+ | 2.29 | Carl Willey | 150 | NYN |
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