| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 11.35 | 196307120_LAN_NYN |
| Jim O'Toole | CIN | 7.59 | 196307120_CHN_CIN |
| Larry Jackson | CHN | 4.74 | 196307142_CHN_SLN |
| Juan Pizarro | CHA | 3.51 | 196307120_DET_CHA |
| Jack Kralick | CLE | 1.2 | 196307131_CLE_OAK |
| 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 1963-07-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.93 | Sandy Koufax | 165.3 | LAN |
| +003+ | 5.86 | Dick Ellsworth | 158 | CHN |
| +005+ | 5.52 | Bob Friend | 158.7 | PIT |
| +006+ | 5.26 | Jim O'Toole | 159 | CIN |
| +009+ | 4.74 | Juan Marichal | 170.3 | SFN |
| +010+ | 4.65 | Larry Jackson | 158.7 | CHN |
| +017+ | 3.39 | Juan Pizarro | 137 | CHA |
| +020+ | 3.21 | Ray Culp | 137 | PHI |
| +027+ | 2.95 | Denny Lemaster | 128.3 | ATL |
| +029+ | 2.84 | John Buzhardt | 122.3 | CHA |
| +030+ | 2.82 | Don Schwall | 94.3 | PIT |
| +036+ | 2.69 | Don Drysdale | 178 | LAN |
| +037+ | 2.63 | Carl Willey | 119.7 | NYN |
| +039+ | 2.56 | Steve Barber | 144 | BAL |
| +042+ | 2.51 | Joe Nuxhall | 105 | CIN |
| +045+ | 2.45 | Whitey Ford | 138 | NYA |
| +048+ | 2.44 | Bobby Bolin | 62.3 | SFN |
| +049+ | 2.39 | Warren Spahn | 148 | ATL |
| +054+ | 2.32 | Ken McBride | 160.7 | ANA |
| +055+ | 2.31 | Camilo Pascual | 108.7 | MIN |
| +057+ | 2.28 | Tom Cheney | 127.7 | TEX |
| +061+ | 2.13 | Jim Bouton | 126.3 | NYA |
| +066+ | 2.01 | Jim Maloney | 137.3 | CIN |
| +067+ | 1.93 | Ernie Broglio | 134.3 | SLN |
| +069+ | 1.9 | Gary Peters | 100 | CHA |
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