| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 12.18 | 196309170_LAN_SLN |
| Dick Ellsworth | CHN | 8.28 | 196309150_CIN_CHN |
| Juan Marichal | SFN | 5.89 | 196309160_SFN_ATL |
| Bob Friend | PIT | 5.74 | 196309171_CHN_PIT |
| Curt Simmons | SLN | 2.5 | 196309170_LAN_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jay Hook | NYN | -4.56 | 196309152_HOU_NYN |
| Ray Sadecki | SLN | -2.12 | 196309152_ATL_SLN |
| Bennie Daniels | TEX | -1.65 | 196309170_OAK_TEX |
| Bo Belinsky | ANA | -1.59 | 196309150_CLE_ANA |
| Mudcat Grant | CLE | -0.98 | 196309150_CLE_ANA |
Based on accumulated WAA for this season up to 1963-09-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 10.95 | Sandy Koufax | 298.3 | LAN |
| +004+ | 8.15 | Dick Ellsworth | 272.7 | CHN |
| +007+ | 7.27 | Gary Peters | 224.7 | CHA |
| +009+ | 7.07 | Juan Marichal | 295 | SFN |
| +010+ | 6.97 | Bob Friend | 262 | PIT |
| +016+ | 6.31 | Larry Jackson | 260.3 | CHN |
| +018+ | 5.41 | Jim Bouton | 235.3 | NYA |
| +024+ | 4.94 | Curt Simmons | 227.3 | SLN |
| +026+ | 4.6 | Jim Maloney | 230 | CIN |
| +028+ | 4.57 | Don Drysdale | 294.7 | LAN |
| +027+ | 4.57 | Steve Barber | 247.7 | BAL |
| +029+ | 4.52 | Camilo Pascual | 221.3 | MIN |
| +037+ | 3.91 | Jim O'Toole | 229.3 | CIN |
| +039+ | 3.86 | Al Downing | 161.7 | NYA |
| +040+ | 3.85 | Warren Spahn | 232 | ATL |
| +041+ | 3.8 | Whitey Ford | 254.3 | NYA |
| +043+ | 3.76 | Joe Nuxhall | 199.3 | CIN |
| +049+ | 3.49 | Lee Stange | 151.7 | MIN |
| +050+ | 3.47 | Milt Pappas | 216 | BAL |
| +060+ | 3.09 | Ken Johnson | 205.7 | HOU |
| +064+ | 3.03 | Bob Veale | 60.7 | PIT |
| +066+ | 2.99 | Ray Culp | 203.3 | PHI |
| +072+ | 2.75 | Bob Sadowski | 105.3 | ATL |
| +079+ | 2.57 | Bob Shaw | 153 | ATL |
| +083+ | 2.48 | Carl Willey | 171 | NYN |
_