| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 10.65 | 196306210_LAN_SLN |
| Bob Friend | PIT | 5.5 | 196306220_PIT_CHN |
| Whitey Ford | NYA | 4.9 | 196306221_NYA_BOS |
| Warren Spahn | ATL | 2.87 | 196306230_SFN_ATL |
| Juan Pizarro | CHA | 2.72 | 196306210_CHA_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Craig | NYN | -3.04 | 196306220_PHI_NYN |
| Don Rudolph | TEX | -1.59 | 196306210_TEX_ANA |
| Ike Delock | BAL | -0.96 | 196306211_BAL_MIN |
| Ryne Duren | PHI | -0.84 | 196306232_PHI_NYN |
| Barry Latman | CLE | -0.82 | 196306232_CHA_CLE |
Based on accumulated WAA for this season up to 1963-06-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 4.94 | Sandy Koufax | 124.7 | LAN |
| +004+ | 4.79 | Jim O'Toole | 130 | CIN |
| +006+ | 4.42 | Dick Ellsworth | 120 | CHN |
| +008+ | 4.12 | Larry Jackson | 129.3 | CHN |
| +010+ | 3.98 | Bob Friend | 126 | PIT |
| +011+ | 3.5 | Jim Bouton | 104.3 | NYA |
| +013+ | 3.4 | Juan Pizarro | 107.7 | CHA |
| +015+ | 3.12 | Denny Lemaster | 92.3 | ATL |
| +016+ | 3 | Juan Marichal | 125.3 | SFN |
| +017+ | 2.89 | John Buzhardt | 98.7 | CHA |
| +027+ | 2.57 | Ray Culp | 107.3 | PHI |
| +029+ | 2.46 | Ernie Broglio | 113.7 | SLN |
| +030+ | 2.42 | Billy O'Dell | 113 | SFN |
| +031+ | 2.34 | Steve Barber | 129.3 | BAL |
| +034+ | 2.25 | Jack Kralick | 99 | TOT |
| +035+ | 2.24 | Bobby Bolin | 53.7 | SFN |
| +037+ | 2.2 | Earl Wilson | 106.7 | BOS |
| +039+ | 2.17 | Don Schwall | 80.7 | PIT |
| +040+ | 2.12 | Camilo Pascual | 105.7 | MIN |
| +045+ | 2.08 | Carl Willey | 97 | NYN |
| +049+ | 2.01 | Al McBean | 68.3 | PIT |
| +048+ | 2.01 | Bob Buhl | 121.3 | CHN |
| +052+ | 1.95 | Tom Cheney | 107.7 | TEX |
| +056+ | 1.79 | Jack Sanford | 133.7 | SFN |
| +061+ | 1.68 | Turk Farrell | 85.3 | HOU |
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