| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 13.34 | 196307161_LAN_PHI |
| Bob Friend | PIT | 8.88 | 196307151_SFN_PIT |
| Jim O'Toole | CIN | 7.15 | 196307170_SLN_CIN |
| Juan Marichal | SFN | 4.88 | 196307151_SFN_PIT |
| Whitey Ford | NYA | 4.32 | 196307150_NYA_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Paul Foytack | ANA | -1.87 | 196307172_CLE_ANA |
| Roger Craig | NYN | -1.11 | 196307152_HOU_NYN |
| Diego Segui | OAK | -1.03 | 196307170_BOS_OAK |
| Jerry Walker | CLE | -0.94 | 196307171_CLE_ANA |
| Vern Law | PIT | -0.78 | 196307170_LAN_PIT |
Based on accumulated WAA for this season up to 1963-07-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.25 | Sandy Koufax | 174.3 | LAN |
| +003+ | 6.42 | Dick Ellsworth | 164.7 | CHN |
| +004+ | 5.96 | Bob Friend | 166.3 | PIT |
| +007+ | 5.31 | Jim O'Toole | 168 | CIN |
| +009+ | 5.02 | Juan Marichal | 178.3 | SFN |
| +010+ | 4.68 | Larry Jackson | 158.7 | CHN |
| +014+ | 3.97 | Juan Pizarro | 144 | CHA |
| +020+ | 3.3 | Denny Lemaster | 135.3 | ATL |
| +027+ | 2.95 | Ray Culp | 139.3 | PHI |
| +028+ | 2.93 | Don Schwall | 100.7 | PIT |
| +030+ | 2.87 | Jim Bouton | 135.7 | NYA |
| +031+ | 2.87 | John Buzhardt | 122.3 | CHA |
| +032+ | 2.86 | Ken McBride | 169.7 | ANA |
| +039+ | 2.64 | Gary Peters | 109 | CHA |
| +043+ | 2.55 | Bobby Bolin | 68.7 | SFN |
| +044+ | 2.55 | Joe Nuxhall | 111 | CIN |
| +046+ | 2.46 | Don Drysdale | 182.7 | LAN |
| +050+ | 2.41 | Warren Spahn | 148 | ATL |
| +052+ | 2.38 | Steve Barber | 149 | BAL |
| +055+ | 2.33 | Camilo Pascual | 108.7 | MIN |
| +056+ | 2.31 | Tom Cheney | 127.7 | TEX |
| +058+ | 2.19 | Carl Willey | 124.7 | NYN |
| +060+ | 2.15 | Bob Buhl | 153.3 | CHN |
| +064+ | 2.12 | Jack Kralick | 128.3 | TOT |
| +065+ | 2.08 | Ernie Broglio | 141.3 | SLN |
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