| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Friend | PIT | 8.62 | 196307230_PIT_LAN |
| Jim O'Toole | CIN | 6.98 | 196307210_SFN_CIN |
| Juan Marichal | SFN | 5.19 | 196307230_NYN_SFN |
| Larry Jackson | CHN | 5.07 | 196307230_CIN_CHN |
| Juan Pizarro | CHA | 3.86 | 196307210_BOS_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Sadecki | SLN | -3.82 | 196307230_SLN_ATL |
| Barry Latman | CLE | -1.87 | 196307212_CLE_NYA |
| Roger Craig | NYN | -1.63 | 196307230_NYN_SFN |
| Paul Foytack | ANA | -1.2 | 196307230_ANA_NYA |
| Stan Williams | NYA | -0.83 | 196307230_ANA_NYA |
Based on accumulated WAA for this season up to 1963-07-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.18 | Sandy Koufax | 179.7 | LAN |
| +003+ | 6.29 | Bob Friend | 180.3 | PIT |
| +004+ | 6.09 | Dick Ellsworth | 170.7 | CHN |
| +005+ | 6.04 | Juan Marichal | 189.3 | SFN |
| +007+ | 5.65 | Larry Jackson | 175.7 | CHN |
| +009+ | 5.09 | Jim O'Toole | 172 | CIN |
| +013+ | 4.63 | Juan Pizarro | 151 | CHA |
| +020+ | 3.44 | Gary Peters | 118 | CHA |
| +021+ | 3.38 | Steve Barber | 160.3 | BAL |
| +024+ | 3.29 | Ken McBride | 178.7 | ANA |
| +032+ | 3.08 | Jim Bouton | 142.7 | NYA |
| +033+ | 3.06 | John Buzhardt | 126.3 | CHA |
| +035+ | 3.01 | Denny Lemaster | 141 | ATL |
| +038+ | 2.92 | Joe Nuxhall | 120 | CIN |
| +040+ | 2.9 | Don Drysdale | 191.7 | LAN |
| +044+ | 2.72 | Camilo Pascual | 126.7 | MIN |
| +045+ | 2.62 | Don Schwall | 107 | PIT |
| +049+ | 2.54 | Jim Maloney | 153.7 | CIN |
| +051+ | 2.52 | Warren Spahn | 148 | ATL |
| +052+ | 2.49 | Johnny Podres | 132 | LAN |
| +055+ | 2.37 | Tom Cheney | 127.7 | TEX |
| +060+ | 2.25 | Bobby Bolin | 74.7 | SFN |
| +064+ | 2.23 | Bob Buhl | 154 | CHN |
| +066+ | 2.15 | Dallas Green | 78 | PHI |
| +075+ | 1.99 | Milt Pappas | 130.3 | BAL |
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