| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 8.49 | 196305240_LAN_SFN |
| Warren Spahn | ATL | 5.99 | 196305240_PIT_ATL |
| Whitey Ford | NYA | 4.29 | 196305240_TEX_NYA |
| Steve Barber | BAL | 3.31 | 196305261_BAL_CLE |
| Bob Friend | PIT | 2.96 | 196305240_PIT_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Sadecki | SLN | -3.67 | 196305250_NYN_SLN |
| Galen Cisco | NYN | -3.06 | 196305261_NYN_SLN |
| Lew Burdette | ATL | -1.75 | 196305260_PIT_ATL |
| Sam McDowell | CLE | -0.86 | 196305240_BAL_CLE |
| Chris Short | PHI | -0.86 | 196305261_PHI_CIN |
Based on accumulated WAA for this season up to 1963-05-26.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.63 | Dick Ellsworth | 65.7 | CHN |
| +007+ | 2.75 | Jim O'Toole | 78 | CIN |
| +008+ | 2.75 | Sandy Koufax | 68.3 | LAN |
| +010+ | 2.57 | Steve Barber | 90.7 | BAL |
| +013+ | 2.52 | Larry Jackson | 88.3 | CHN |
| +012+ | 2.52 | Ernie Broglio | 72.3 | SLN |
| +014+ | 2.31 | Denny Lemaster | 48.7 | ATL |
| +015+ | 2.25 | Don Schwall | 50 | PIT |
| +017+ | 2.24 | Milt Pappas | 50.7 | BAL |
| +019+ | 2.13 | Joe Nuxhall | 63 | CIN |
| +020+ | 2.1 | Jack Sanford | 91.7 | SFN |
| +025+ | 1.94 | Curt Simmons | 70.3 | SLN |
| +030+ | 1.82 | Carl Willey | 57.3 | NYN |
| +033+ | 1.7 | Joe Gibbon | 38.3 | PIT |
| +035+ | 1.68 | Juan Pizarro | 60.3 | CHA |
| +036+ | 1.67 | Jim Bouton | 59 | NYA |
| +037+ | 1.66 | Bob Friend | 73.3 | PIT |
| +038+ | 1.65 | Jim Maloney | 67.3 | CIN |
| +039+ | 1.62 | Tom Cheney | 67 | TEX |
| +040+ | 1.6 | Bob Buhl | 77 | CHN |
| +046+ | 1.41 | Billy O'Dell | 67.3 | SFN |
| +048+ | 1.35 | Robin Roberts | 68 | BAL |
| +052+ | 1.29 | Al Jackson | 78.7 | NYN |
| XXXXX | 1.23 | Ray Culp | 63.3 | PHI |
| XXXXX | 1.18 | Juan Marichal | 75 | SFN |
_