| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 10 | 196307290_PHI_LAN |
| Bob Friend | PIT | 9.07 | 196307310_PIT_HOU |
| Juan Marichal | SFN | 6.91 | 196307310_PHI_SFN |
| Jim O'Toole | CIN | 5.35 | 196307310_CIN_SLN |
| Warren Spahn | ATL | 2.99 | 196307290_CIN_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tracy Stallard | NYN | -2.82 | 196307300_NYN_LAN |
| Dave Wickersham | OAK | -1.93 | 196307290_OAK_NYA |
| Barry Latman | CLE | -1.43 | 196307311_ANA_CLE |
| Hank Fischer | ATL | -0.95 | 196307300_CHN_ATL |
| Steve Ridzik | TEX | -0.86 | 196307290_CHA_TEX |
Based on accumulated WAA for this season up to 1963-07-31.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 7.16 | Dick Ellsworth | 188.7 | CHN |
| +002+ | 7.16 | Sandy Koufax | 194.7 | LAN |
| +004+ | 6.6 | Juan Marichal | 207.3 | SFN |
| +005+ | 6.59 | Bob Friend | 193.3 | PIT |
| +008+ | 5.71 | Larry Jackson | 183.7 | CHN |
| +009+ | 5.49 | Jim O'Toole | 181 | CIN |
| +010+ | 5.16 | Juan Pizarro | 159.7 | CHA |
| +016+ | 4.5 | Gary Peters | 136 | CHA |
| +017+ | 4.36 | Ken McBride | 193.7 | ANA |
| +019+ | 3.85 | Denny Lemaster | 159 | ATL |
| +025+ | 3.57 | Steve Barber | 175.3 | BAL |
| +027+ | 3.47 | Milt Pappas | 148.3 | BAL |
| +029+ | 3.31 | Camilo Pascual | 135.7 | MIN |
| +037+ | 3.09 | John Buzhardt | 126.3 | CHA |
| +038+ | 3.05 | Warren Spahn | 164.7 | ATL |
| +039+ | 3.03 | Jim Bouton | 160 | NYA |
| +040+ | 3.03 | Joe Nuxhall | 133.3 | CIN |
| +045+ | 2.7 | Don Drysdale | 207 | LAN |
| +051+ | 2.61 | Joe Gibbon | 88.3 | PIT |
| +052+ | 2.56 | Don Schwall | 113.3 | PIT |
| +053+ | 2.55 | Jim Maloney | 160.7 | CIN |
| +057+ | 2.51 | Tom Cheney | 128.7 | TEX |
| +059+ | 2.5 | Bobby Bolin | 80.7 | SFN |
| +063+ | 2.33 | Johnny Podres | 137.7 | LAN |
| +070+ | 2.2 | Ray Culp | 148.3 | PHI |
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