| Starter | Tm | Tier | Game |
|---|---|---|---|
| Warren Spahn | ATL | 5.53 | 196305140_SLN_ATL |
| Whitey Ford | NYA | 4.92 | 196305140_MIN_NYA |
| Bob Purkey | CIN | 2.9 | 196305121_CIN_NYN |
| Don Drysdale | LAN | 2.84 | 196305140_PHI_LAN |
| Bob Friend | PIT | 1.97 | 196305140_PIT_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jay Hook | NYN | -7.03 | 196305122_CIN_NYN |
| Ray Sadecki | SLN | -3.35 | 196305122_SLN_PIT |
| Jim Owens | CIN | -1.88 | 196305122_CIN_NYN |
| Cal McLish | PHI | -1.85 | 196305140_PHI_LAN |
| Jack Fisher | SFN | -1.62 | 196305120_SFN_LAN |
Based on accumulated WAA for this season up to 1963-05-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 2.93 | Dick Ellsworth | 49.7 | CHN |
| +004+ | 2.61 | Curt Simmons | 51 | SLN |
| +006+ | 2.46 | Sandy Koufax | 46.7 | LAN |
| +007+ | 2.25 | Steve Barber | 72.7 | BAL |
| +008+ | 2.24 | Joe Nuxhall | 45 | CIN |
| +010+ | 2.06 | Bob Buhl | 59.7 | CHN |
| +011+ | 2.03 | Juan Pizarro | 43 | CHA |
| +012+ | 1.97 | Joe Gibbon | 27 | PIT |
| +016+ | 1.76 | Tom Cheney | 47.3 | TEX |
| +017+ | 1.72 | Dave Morehead | 32.7 | BOS |
| +018+ | 1.7 | Ray Herbert | 49.7 | CHA |
| +019+ | 1.65 | Jack Sanford | 71.7 | SFN |
| +023+ | 1.56 | Carl Willey | 37 | NYN |
| +026+ | 1.54 | Ray Washburn | 53.3 | SLN |
| +025+ | 1.54 | Jim O'Toole | 62 | CIN |
| +027+ | 1.5 | Orlando Pena | 45 | OAK |
| +030+ | 1.47 | Don Schwall | 31.3 | PIT |
| +031+ | 1.47 | Dick Stigman | 49 | MIN |
| +033+ | 1.43 | Ernie Broglio | 54.7 | SLN |
| +034+ | 1.42 | Billy O'Dell | 44.7 | SFN |
| +039+ | 1.3 | Larry Jackson | 63.3 | CHN |
| XXXXX | 1.22 | Phil Regan | 40.3 | DET |
| XXXXX | 1.22 | Earl Wilson | 50.3 | BOS |
| XXXXX | 1.2 | Johnny Klippstein | 30.7 | PHI |
| XXXXX | 1.19 | Denny Lemaster | 30.3 | ATL |
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