| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Friend | PIT | 9.07 | 196307310_PIT_HOU |
| Juan Marichal | SFN | 6.91 | 196307310_PHI_SFN |
| Dick Ellsworth | CHN | 6.32 | 196308020_SFN_CHN |
| Jim O'Toole | CIN | 5.35 | 196307310_CIN_SLN |
| Juan Pizarro | CHA | 4.83 | 196308020_CHA_ANA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Sadecki | SLN | -3.36 | 196308020_PHI_SLN |
| Galen Cisco | NYN | -2.54 | 196308022_NYN_ATL |
| Bennie Daniels | TEX | -1.79 | 196308021_BOS_TEX |
| Barry Latman | CLE | -1.43 | 196307311_ANA_CLE |
| Dave Morehead | BOS | -0.74 | 196308022_BOS_TEX |
Based on accumulated WAA for this season up to 1963-08-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 7.2 | Sandy Koufax | 194.7 | LAN |
| +003+ | 6.63 | Bob Friend | 193.3 | PIT |
| +004+ | 6.61 | Juan Marichal | 207.3 | SFN |
| +006+ | 6.33 | Dick Ellsworth | 191.3 | CHN |
| +008+ | 6.23 | Larry Jackson | 192.7 | CHN |
| +009+ | 5.7 | Juan Pizarro | 168.7 | CHA |
| +010+ | 5.52 | Jim O'Toole | 181 | CIN |
| +016+ | 4.52 | Gary Peters | 136 | CHA |
| +017+ | 4.38 | Ken McBride | 193.7 | ANA |
| +022+ | 3.59 | Steve Barber | 175.3 | BAL |
| +026+ | 3.49 | Milt Pappas | 148.3 | BAL |
| +028+ | 3.43 | Camilo Pascual | 144.7 | MIN |
| +031+ | 3.32 | Jim Maloney | 169.7 | CIN |
| +035+ | 3.11 | John Buzhardt | 126.3 | CHA |
| +038+ | 3.05 | Joe Nuxhall | 133.3 | CIN |
| +039+ | 3.05 | Warren Spahn | 164.7 | ATL |
| +037+ | 3.05 | Jim Bouton | 160 | NYA |
| +050+ | 2.65 | Denny Lemaster | 159.7 | ATL |
| +051+ | 2.63 | Joe Gibbon | 88.3 | PIT |
| +052+ | 2.58 | Don Schwall | 113.3 | PIT |
| +056+ | 2.52 | Tom Cheney | 128.7 | TEX |
| +059+ | 2.39 | Don Drysdale | 213 | LAN |
| +061+ | 2.36 | Johnny Podres | 137.7 | LAN |
| +069+ | 2.23 | Ray Culp | 148.3 | PHI |
| +072+ | 2.12 | Billy O'Dell | 159.3 | SFN |
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