| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 10.67 | 196307071_CIN_LAN |
| Jim O'Toole | CIN | 8.27 | 196307050_CIN_LAN |
| Juan Marichal | SFN | 5.02 | 196307072_SLN_SFN |
| Larry Jackson | CHN | 4.65 | 196307050_PHI_CHN |
| Warren Spahn | ATL | 3.77 | 196307070_ATL_HOU |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jay Hook | NYN | -11.07 | 196307070_PIT_NYN |
| Ray Sadecki | SLN | -3.52 | 196307060_SLN_SFN |
| Ike Delock | BAL | -1.67 | 196307051_MIN_BAL |
| Don Rudolph | TEX | -1.18 | 196307050_ANA_TEX |
| Paul Foytack | ANA | -1.16 | 196307072_ANA_TEX |
Based on accumulated WAA for this season up to 1963-07-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.09 | Sandy Koufax | 156.3 | LAN |
| +003+ | 5.31 | Jim O'Toole | 152 | CIN |
| +004+ | 5.16 | Bob Friend | 149.7 | PIT |
| +006+ | 4.9 | Dick Ellsworth | 147 | CHN |
| +008+ | 4.71 | Larry Jackson | 152.7 | CHN |
| +009+ | 4.61 | Juan Marichal | 162.3 | SFN |
| +013+ | 3.85 | Juan Pizarro | 132.3 | CHA |
| +016+ | 3.58 | Denny Lemaster | 121.7 | ATL |
| +018+ | 3.26 | Ray Culp | 131 | PHI |
| +026+ | 2.86 | Earl Wilson | 126.7 | BOS |
| +030+ | 2.77 | Steve Barber | 142.3 | BAL |
| +034+ | 2.63 | Don Drysdale | 171 | LAN |
| +041+ | 2.46 | Don Schwall | 87.7 | PIT |
| +042+ | 2.44 | John Buzhardt | 117.3 | CHA |
| +048+ | 2.32 | Ken McBride | 153.3 | ANA |
| +046+ | 2.32 | Camilo Pascual | 108.7 | MIN |
| +045+ | 2.32 | Jack Kralick | 114 | TOT |
| +047+ | 2.32 | Bobby Bolin | 61.3 | SFN |
| +049+ | 2.27 | Warren Spahn | 148 | ATL |
| +055+ | 2.14 | Carl Willey | 111.7 | NYN |
| +057+ | 2.01 | Jim Bouton | 120.3 | NYA |
| +060+ | 1.94 | Ernie Broglio | 127.3 | SLN |
| +059+ | 1.94 | Milt Pappas | 111 | BAL |
| +064+ | 1.87 | Jim Maloney | 128 | CIN |
| +065+ | 1.83 | Gary Peters | 91.3 | CHA |
_