| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 11.55 | 196309100_LAN_PIT |
| Dick Ellsworth | CHN | 8.92 | 196309110_CHN_SLN |
| Bob Friend | PIT | 7.8 | 196309120_LAN_PIT |
| Juan Marichal | SFN | 5.09 | 196309120_SFN_NYN |
| Jim Maloney | CIN | 1.77 | 196309110_ATL_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Barry Latman | CLE | -3.67 | 196309100_CLE_MIN |
| Ray Sadecki | SLN | -2.53 | 196309110_CHN_SLN |
| Tracy Stallard | NYN | -1.82 | 196309120_SFN_NYN |
| Bo Belinsky | ANA | -1.63 | 196309100_BOS_ANA |
| Bennie Daniels | TEX | -1.43 | 196309110_DET_TEX |
Based on accumulated WAA for this season up to 1963-09-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 9.98 | Sandy Koufax | 282.3 | LAN |
| +003+ | 8.36 | Dick Ellsworth | 266.3 | CHN |
| +005+ | 7.76 | Gary Peters | 221.7 | CHA |
| +008+ | 7.16 | Juan Marichal | 286 | SFN |
| +009+ | 7.06 | Bob Friend | 253 | PIT |
| +016+ | 5.73 | Larry Jackson | 252 | CHN |
| +019+ | 5.43 | Warren Spahn | 227.7 | ATL |
| +025+ | 4.78 | Jim Bouton | 226.3 | NYA |
| +026+ | 4.7 | Jim Maloney | 230 | CIN |
| +027+ | 4.64 | Steve Barber | 239.3 | BAL |
| +028+ | 4.53 | Don Drysdale | 287.7 | LAN |
| +031+ | 4.39 | Camilo Pascual | 213.3 | MIN |
| +032+ | 4.29 | Curt Simmons | 210.3 | SLN |
| +036+ | 4.13 | Joe Nuxhall | 190 | CIN |
| +038+ | 4.01 | Jim O'Toole | 229.3 | CIN |
| +041+ | 3.77 | Al Downing | 154.7 | NYA |
| +046+ | 3.51 | Ray Culp | 198.3 | PHI |
| +049+ | 3.38 | Whitey Ford | 245.3 | NYA |
| +052+ | 3.32 | Lee Stange | 143.7 | MIN |
| +054+ | 3.21 | Milt Pappas | 209 | BAL |
| +079+ | 2.55 | Denny Lemaster | 215.3 | ATL |
| +080+ | 2.5 | Bob Sadowski | 99.3 | ATL |
| +084+ | 2.44 | Ken Johnson | 196.7 | HOU |
| +085+ | 2.41 | Carl Willey | 164 | NYN |
| +086+ | 2.34 | Bob Veale | 51.7 | PIT |
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