| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 8.49 | 196305240_LAN_SFN |
| Warren Spahn | ATL | 5.99 | 196305240_PIT_ATL |
| Jim O'Toole | CIN | 5.69 | 196305230_CIN_ATL |
| Whitey Ford | NYA | 4.29 | 196305240_TEX_NYA |
| Bob Friend | PIT | 2.96 | 196305240_PIT_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Sadecki | SLN | -3.67 | 196305250_NYN_SLN |
| Roger Craig | NYN | -2.18 | 196305240_NYN_SLN |
| Sam McDowell | CLE | -0.86 | 196305240_BAL_CLE |
| Bob Bruce | HOU | -0.72 | 196305240_HOU_CHN |
| Cal McLish | PHI | -0.59 | 196305240_PHI_CIN |
Based on accumulated WAA for this season up to 1963-05-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.59 | Dick Ellsworth | 65.7 | CHN |
| +003+ | 3.08 | Steve Barber | 87.3 | BAL |
| +007+ | 2.72 | Sandy Koufax | 68.3 | LAN |
| +008+ | 2.71 | Jim O'Toole | 78 | CIN |
| +011+ | 2.51 | Ernie Broglio | 72.3 | SLN |
| +012+ | 2.47 | Larry Jackson | 88.3 | CHN |
| +015+ | 2.3 | Denny Lemaster | 48.7 | ATL |
| +016+ | 2.21 | Milt Pappas | 50.7 | BAL |
| +017+ | 2.2 | Curt Simmons | 63.3 | SLN |
| +019+ | 2.14 | Don Schwall | 43.7 | PIT |
| +020+ | 2.09 | Joe Nuxhall | 63 | CIN |
| +022+ | 2.03 | Jack Sanford | 88.7 | SFN |
| +025+ | 1.87 | Jim Maloney | 60.3 | CIN |
| +032+ | 1.7 | Joe Gibbon | 38.3 | PIT |
| +035+ | 1.66 | Bob Friend | 73.3 | PIT |
| +036+ | 1.62 | Juan Pizarro | 60.3 | CHA |
| +038+ | 1.56 | Tom Cheney | 67 | TEX |
| +041+ | 1.51 | Carl Willey | 48.7 | NYN |
| +044+ | 1.38 | Billy O'Dell | 67.3 | SFN |
| +045+ | 1.34 | Orlando Pena | 55 | OAK |
| +048+ | 1.31 | Robin Roberts | 68 | BAL |
| +051+ | 1.26 | Al Jackson | 78.7 | NYN |
| XXXXX | 1.15 | Juan Marichal | 75 | SFN |
| XXXXX | 1.12 | Jim Bouton | 50 | NYA |
| XXXXX | 1.11 | Dave Morehead | 42.7 | BOS |
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