| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 11.42 | 196307250_PIT_LAN |
| Bob Friend | PIT | 8.62 | 196307230_PIT_LAN |
| Juan Marichal | SFN | 5.19 | 196307230_NYN_SFN |
| Larry Jackson | CHN | 5.07 | 196307230_CIN_CHN |
| Warren Spahn | ATL | 3.18 | 196307250_SLN_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Sadecki | SLN | -3.82 | 196307230_SLN_ATL |
| Galen Cisco | NYN | -3.25 | 196307250_NYN_SFN |
| Barry Latman | CLE | -2.13 | 196307250_MIN_CLE |
| Dave Wickersham | OAK | -1.52 | 196307242_OAK_BOS |
| Paul Foytack | ANA | -1.2 | 196307230_ANA_NYA |
Based on accumulated WAA for this season up to 1963-07-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 6.81 | Sandy Koufax | 185.7 | LAN |
| +003+ | 6.58 | Dick Ellsworth | 179.7 | CHN |
| +004+ | 6.29 | Bob Friend | 180.3 | PIT |
| +005+ | 6.03 | Juan Marichal | 189.3 | SFN |
| +008+ | 5.64 | Larry Jackson | 175.7 | CHN |
| +009+ | 5.09 | Jim O'Toole | 172 | CIN |
| +011+ | 4.75 | Juan Pizarro | 152.7 | CHA |
| +015+ | 4.02 | Ken McBride | 187.7 | ANA |
| +016+ | 3.94 | Gary Peters | 127 | CHA |
| +021+ | 3.51 | Denny Lemaster | 150 | ATL |
| +023+ | 3.4 | Don Drysdale | 200.7 | LAN |
| +024+ | 3.37 | Steve Barber | 160.3 | BAL |
| +034+ | 3.06 | Jim Bouton | 142.7 | NYA |
| +035+ | 3.05 | John Buzhardt | 126.3 | CHA |
| +039+ | 2.92 | Joe Nuxhall | 120 | CIN |
| +043+ | 2.73 | Ray Culp | 144.3 | PHI |
| +044+ | 2.72 | Camilo Pascual | 126.7 | MIN |
| +045+ | 2.7 | Warren Spahn | 155.7 | ATL |
| +046+ | 2.62 | Don Schwall | 107 | PIT |
| +049+ | 2.54 | Jim Maloney | 153.7 | CIN |
| +051+ | 2.48 | Johnny Podres | 132 | LAN |
| +053+ | 2.46 | Tom Cheney | 128.7 | TEX |
| +059+ | 2.3 | Bobby Bolin | 78 | SFN |
| +062+ | 2.26 | Bob Buhl | 162.3 | CHN |
| +069+ | 2.15 | Dallas Green | 78 | PHI |
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