| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 10.67 | 196307071_CIN_LAN |
| Bob Friend | PIT | 8.25 | 196307100_HOU_PIT |
| Juan Marichal | SFN | 5.02 | 196307072_SLN_SFN |
| Warren Spahn | ATL | 3.77 | 196307070_ATL_HOU |
| Dick Ellsworth | CHN | 2.55 | 196307070_PHI_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jay Hook | NYN | -11.07 | 196307070_PIT_NYN |
| Ray Sadecki | SLN | -3.52 | 196307060_SLN_SFN |
| Paul Foytack | ANA | -1.16 | 196307072_ANA_TEX |
| Vern Law | PIT | -1.13 | 196307070_PIT_NYN |
| Dave Stenhouse | TEX | -1.02 | 196307060_ANA_TEX |
Based on accumulated WAA for this season up to 1963-07-10.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.07 | Sandy Koufax | 156.3 | LAN |
| +003+ | 5.44 | Bob Friend | 158.7 | PIT |
| +004+ | 5.28 | Jim O'Toole | 152 | CIN |
| +007+ | 4.9 | Dick Ellsworth | 147 | CHN |
| +008+ | 4.71 | Larry Jackson | 152.7 | CHN |
| +009+ | 4.61 | Juan Marichal | 162.3 | SFN |
| +013+ | 3.83 | Juan Pizarro | 132.3 | CHA |
| +017+ | 3.57 | Denny Lemaster | 121.7 | ATL |
| +019+ | 3.24 | Ray Culp | 131 | PHI |
| +029+ | 2.75 | Steve Barber | 142.3 | BAL |
| +034+ | 2.61 | Don Drysdale | 171 | LAN |
| +036+ | 2.56 | Carl Willey | 119.7 | NYN |
| +040+ | 2.46 | Earl Wilson | 132.7 | BOS |
| +041+ | 2.45 | Don Schwall | 87.7 | PIT |
| +042+ | 2.42 | John Buzhardt | 117.3 | CHA |
| +045+ | 2.32 | Bobby Bolin | 61.3 | SFN |
| +046+ | 2.31 | Jack Kralick | 114 | TOT |
| +047+ | 2.3 | Ken McBride | 153.3 | ANA |
| +048+ | 2.3 | Camilo Pascual | 108.7 | MIN |
| +050+ | 2.25 | Warren Spahn | 148 | ATL |
| +059+ | 2 | Jim Bouton | 120.3 | NYA |
| +063+ | 1.93 | Ernie Broglio | 127.3 | SLN |
| +062+ | 1.93 | Milt Pappas | 111 | BAL |
| +066+ | 1.85 | Jim Maloney | 128 | CIN |
| +067+ | 1.82 | Gary Peters | 91.3 | CHA |
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