| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Friend | PIT | 8.88 | 196307151_SFN_PIT |
| Juan Marichal | SFN | 4.88 | 196307151_SFN_PIT |
| Larry Jackson | CHN | 4.74 | 196307142_CHN_SLN |
| Whitey Ford | NYA | 4.32 | 196307150_NYA_OAK |
| Don Drysdale | LAN | 3.48 | 196307150_LAN_PHI |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Sadecki | SLN | -4 | 196307141_CHN_SLN |
| Galen Cisco | NYN | -3.34 | 196307140_HOU_NYN |
| Vern Law | PIT | -1.48 | 196307130_HOU_PIT |
| Ike Delock | BAL | -1.36 | 196307130_BAL_TEX |
| Barry Latman | CLE | -1.33 | 196307142_CLE_MIN |
Based on accumulated WAA for this season up to 1963-07-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.92 | Sandy Koufax | 165.3 | LAN |
| +002+ | 6.41 | Dick Ellsworth | 164.7 | CHN |
| +004+ | 5.96 | Bob Friend | 166.3 | PIT |
| +007+ | 5.23 | Jim O'Toole | 159 | CIN |
| +008+ | 5.01 | Juan Marichal | 178.3 | SFN |
| +010+ | 4.67 | Larry Jackson | 158.7 | CHN |
| +017+ | 3.4 | Juan Pizarro | 137 | CHA |
| +018+ | 3.28 | Denny Lemaster | 135.3 | ATL |
| +025+ | 2.96 | Ray Culp | 139.3 | PHI |
| +030+ | 2.86 | John Buzhardt | 122.3 | CHA |
| +031+ | 2.84 | Don Schwall | 94.3 | PIT |
| +037+ | 2.63 | Gary Peters | 109 | CHA |
| +039+ | 2.59 | Steve Barber | 144 | BAL |
| +040+ | 2.56 | Joe Nuxhall | 111 | CIN |
| +046+ | 2.46 | Bobby Bolin | 62.3 | SFN |
| +048+ | 2.43 | Don Drysdale | 182.7 | LAN |
| +050+ | 2.38 | Warren Spahn | 148 | ATL |
| +052+ | 2.34 | Ken McBride | 160.7 | ANA |
| +053+ | 2.33 | Camilo Pascual | 108.7 | MIN |
| +055+ | 2.3 | Tom Cheney | 127.7 | TEX |
| +059+ | 2.21 | Carl Willey | 124.7 | NYN |
| +060+ | 2.13 | Jim Bouton | 126.7 | NYA |
| +063+ | 2.08 | Ernie Broglio | 141.3 | SLN |
| +066+ | 1.98 | Jim Maloney | 137.3 | CIN |
| +072+ | 1.89 | Earl Wilson | 137.7 | BOS |
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