| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 10.45 | 196308250_ATL_LAN |
| Dick Ellsworth | CHN | 7.08 | 196308250_NYN_CHN |
| Gary Peters | CHA | 6.25 | 196308252_CHA_NYA |
| Camilo Pascual | MIN | 2.62 | 196308250_MIN_BAL |
| Steve Barber | BAL | 2.49 | 196308250_MIN_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jay Hook | NYN | -7.74 | 196308250_NYN_CHN |
| Jim Bunning | DET | -1.89 | 196308252_OAK_DET |
| Dick Donovan | CLE | -1.83 | 196308240_BOS_CLE |
| Dave Wickersham | OAK | -1.32 | 196308232_OAK_DET |
| Steve Ridzik | TEX | -1.08 | 196308230_ANA_TEX |
Based on accumulated WAA for this season up to 1963-08-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 8.64 | Sandy Koufax | 247.3 | LAN |
| +003+ | 7.99 | Dick Ellsworth | 234.7 | CHN |
| +004+ | 7.49 | Gary Peters | 192.3 | CHA |
| +008+ | 6.88 | Larry Jackson | 228.7 | CHN |
| +009+ | 6.76 | Bob Friend | 222 | PIT |
| +011+ | 6.21 | Juan Marichal | 246.3 | SFN |
| +016+ | 5.02 | Juan Pizarro | 206 | CHA |
| +020+ | 4.61 | Camilo Pascual | 187.7 | MIN |
| +021+ | 4.58 | Steve Barber | 221.3 | BAL |
| +026+ | 4.19 | Jim Bouton | 195 | NYA |
| +027+ | 4.18 | Ken McBride | 231 | ANA |
| +028+ | 4.14 | Don Drysdale | 254 | LAN |
| +031+ | 4.04 | Warren Spahn | 191.7 | ATL |
| +035+ | 3.74 | Jim O'Toole | 203.3 | CIN |
| +043+ | 3.37 | Jim Maloney | 196.3 | CIN |
| +047+ | 3.13 | Al Downing | 130.7 | NYA |
| +052+ | 3.02 | John Buzhardt | 126.3 | CHA |
| +055+ | 2.95 | Curt Simmons | 181.3 | SLN |
| +058+ | 2.82 | Milt Pappas | 181.7 | BAL |
| +064+ | 2.7 | Tom Cheney | 136 | TEX |
| +065+ | 2.7 | Denny Lemaster | 193.3 | ATL |
| +066+ | 2.63 | Joe Nuxhall | 164.3 | CIN |
| +074+ | 2.43 | Turk Farrell | 158.7 | HOU |
| +075+ | 2.37 | Billy O'Dell | 172.7 | SFN |
| +077+ | 2.31 | Carl Willey | 142 | NYN |
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