| 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 |
| Curt Simmons | SLN | 3.11 | 196305210_SLN_CHN |
| Juan Pizarro | CHA | 2.48 | 196305191_CHA_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Craig | NYN | -3.05 | 196305191_NYN_LAN |
| Gene Conley | BOS | -1.99 | 196305192_OAK_BOS |
| Jack Fisher | SFN | -1.93 | 196305191_PHI_SFN |
| Lew Burdette | ATL | -1.39 | 196305191_ATL_CHN |
| Cal McLish | PHI | -1.29 | 196305191_PHI_SFN |
Based on accumulated WAA for this season up to 1963-05-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.7 | Sandy Koufax | 68 | LAN |
| +003+ | 3.29 | Dick Ellsworth | 58.7 | CHN |
| +006+ | 2.8 | Steve Barber | 81.3 | BAL |
| +009+ | 2.43 | Milt Pappas | 45.7 | BAL |
| +012+ | 2.31 | Carl Willey | 46 | NYN |
| +013+ | 2.22 | Curt Simmons | 63.3 | SLN |
| +014+ | 2.17 | Juan Pizarro | 54.3 | CHA |
| +015+ | 2.13 | Don Schwall | 43.7 | PIT |
| +018+ | 1.97 | Jim O'Toole | 69 | CIN |
| +020+ | 1.88 | Jim Maloney | 60.3 | CIN |
| +021+ | 1.85 | Ray Herbert | 58.3 | CHA |
| +022+ | 1.82 | Larry Jackson | 79.3 | CHN |
| +024+ | 1.8 | Ernie Broglio | 63.3 | SLN |
| +027+ | 1.77 | Joe Nuxhall | 54 | CIN |
| +029+ | 1.72 | Jack Sanford | 79.7 | SFN |
| +028+ | 1.72 | Al Jackson | 74.7 | NYN |
| +035+ | 1.56 | Denny Lemaster | 39.7 | ATL |
| +036+ | 1.55 | Bob Buhl | 65.7 | CHN |
| +040+ | 1.35 | Orlando Pena | 55 | OAK |
| +041+ | 1.34 | Dallas Green | 21.7 | PHI |
| +044+ | 1.3 | Joe Gibbon | 31 | PIT |
| +045+ | 1.26 | Turk Farrell | 64.7 | HOU |
| XXXXX | 1.19 | Tom Cheney | 60.3 | TEX |
| XXXXX | 1.18 | Billy O'Dell | 59.7 | SFN |
| XXXXX | 1.17 | Warren Spahn | 68.3 | ATL |
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