| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 7.13 | 196305191_NYN_LAN |
| Whitey Ford | NYA | 6.06 | 196305191_ANA_NYA |
| Warren Spahn | ATL | 5.5 | 196305192_ATL_CHN |
| Bob Purkey | CIN | 3.64 | 196305180_CIN_SLN |
| Steve Barber | BAL | 2.59 | 196305180_CHA_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Sadecki | SLN | -3.38 | 196305180_CIN_SLN |
| Galen Cisco | NYN | -3.22 | 196305170_NYN_SFN |
| Gene Conley | BOS | -1.99 | 196305192_OAK_BOS |
| Jack Fisher | SFN | -1.93 | 196305191_PHI_SFN |
| Jack Hamilton | PHI | -1.64 | 196305170_PHI_HOU |
Based on accumulated WAA for this season up to 1963-05-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.7 | Sandy Koufax | 68 | LAN |
| +003+ | 3.3 | Dick Ellsworth | 58.7 | CHN |
| +004+ | 2.8 | Steve Barber | 81.3 | BAL |
| +009+ | 2.3 | Carl Willey | 46 | NYN |
| +010+ | 2.25 | Curt Simmons | 56 | SLN |
| +013+ | 2.16 | Juan Pizarro | 54.3 | CHA |
| +014+ | 2.1 | Larry Jackson | 72.3 | CHN |
| +015+ | 2.04 | Don Schwall | 40 | PIT |
| +016+ | 2 | Earl Wilson | 59.3 | BOS |
| +017+ | 1.98 | Dave Morehead | 40.7 | BOS |
| +018+ | 1.98 | Jim O'Toole | 69 | CIN |
| +019+ | 1.93 | Orlando Pena | 52 | OAK |
| +022+ | 1.84 | Ray Herbert | 58.3 | CHA |
| +024+ | 1.8 | Ernie Broglio | 63.3 | SLN |
| +025+ | 1.77 | Joe Nuxhall | 54 | CIN |
| +027+ | 1.77 | Johnny Klippstein | 37.3 | PHI |
| +030+ | 1.72 | Jack Sanford | 79.7 | SFN |
| +031+ | 1.71 | Milt Pappas | 36.7 | BAL |
| +032+ | 1.71 | Al Jackson | 74.7 | NYN |
| +036+ | 1.56 | Denny Lemaster | 39.7 | ATL |
| +037+ | 1.55 | Bob Buhl | 65.7 | CHN |
| +038+ | 1.47 | Tom Cheney | 53.3 | TEX |
| +041+ | 1.34 | Dallas Green | 21.7 | PHI |
| +044+ | 1.31 | Jim Bouton | 44.3 | NYA |
| +045+ | 1.3 | Joe Gibbon | 31 | PIT |
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