| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Friend | PIT | 5.5 | 196306220_PIT_CHN |
| Whitey Ford | NYA | 4.9 | 196306221_NYA_BOS |
| Don Drysdale | LAN | 3.13 | 196306240_LAN_CIN |
| Warren Spahn | ATL | 2.87 | 196306230_SFN_ATL |
| Juan Marichal | SFN | 2.69 | 196306240_SFN_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Craig | NYN | -3.04 | 196306220_PHI_NYN |
| Ryne Duren | PHI | -0.84 | 196306232_PHI_NYN |
| Barry Latman | CLE | -0.82 | 196306232_CHA_CLE |
| Chris Zachary | HOU | -0.76 | 196306232_HOU_CIN |
| Vern Law | PIT | -0.76 | 196306230_PIT_CHN |
Based on accumulated WAA for this season up to 1963-06-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 4.95 | Sandy Koufax | 124.7 | LAN |
| +003+ | 4.8 | Jim O'Toole | 130 | CIN |
| +006+ | 4.43 | Dick Ellsworth | 120 | CHN |
| +008+ | 4.13 | Larry Jackson | 129.3 | CHN |
| +009+ | 3.99 | Bob Friend | 126 | PIT |
| +011+ | 3.84 | Denny Lemaster | 101.3 | ATL |
| +012+ | 3.51 | Jim Bouton | 104.3 | NYA |
| +014+ | 3.4 | Juan Pizarro | 107.7 | CHA |
| +017+ | 3.03 | John Buzhardt | 105.7 | CHA |
| +019+ | 2.92 | Juan Marichal | 132 | SFN |
| +026+ | 2.58 | Ray Culp | 107.3 | PHI |
| +029+ | 2.46 | Ernie Broglio | 113.7 | SLN |
| +030+ | 2.43 | Billy O'Dell | 113 | SFN |
| +031+ | 2.36 | Steve Barber | 129.3 | BAL |
| +032+ | 2.26 | Jack Kralick | 99 | TOT |
| +034+ | 2.24 | Bobby Bolin | 53.7 | SFN |
| +036+ | 2.2 | Earl Wilson | 106.7 | BOS |
| +038+ | 2.18 | Don Schwall | 80.7 | PIT |
| +039+ | 2.12 | Camilo Pascual | 105.7 | MIN |
| +044+ | 2.08 | Carl Willey | 97 | NYN |
| +049+ | 2.01 | Al McBean | 68.3 | PIT |
| +048+ | 2.01 | Bob Buhl | 121.3 | CHN |
| +050+ | 1.97 | Tom Cheney | 107.7 | TEX |
| +058+ | 1.79 | Jack Sanford | 133.7 | SFN |
| +066+ | 1.61 | Joe Nuxhall | 81 | CIN |
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