| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Friend | PIT | 8.08 | 196308120_HOU_PIT |
| Juan Marichal | SFN | 7.81 | 196308130_SFN_CIN |
| Larry Jackson | CHN | 7.27 | 196308141_CHN_PHI |
| Warren Spahn | ATL | 2.29 | 196308130_LAN_ATL |
| Jim Bouton | NYA | 2.24 | 196308142_NYA_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dick Donovan | CLE | -2.96 | 196308140_CLE_CHA |
| Al Jackson | NYN | -2.35 | 196308140_PIT_NYN |
| Jim Bunning | DET | -1.76 | 196308130_DET_OAK |
| Dave Wickersham | OAK | -1.27 | 196308130_DET_OAK |
| Dave Morehead | BOS | -0.54 | 196308142_NYA_BOS |
Based on accumulated WAA for this season up to 1963-08-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 7.8 | Sandy Koufax | 218.3 | LAN |
| +003+ | 7.35 | Dick Ellsworth | 210.3 | CHN |
| +004+ | 7.31 | Bob Friend | 211.7 | PIT |
| +005+ | 6.94 | Juan Marichal | 230.3 | SFN |
| +008+ | 6.57 | Larry Jackson | 213.7 | CHN |
| +011+ | 5.41 | Gary Peters | 162.3 | CHA |
| +016+ | 4.8 | Juan Pizarro | 181 | CHA |
| +017+ | 4.59 | Jim O'Toole | 191.3 | CIN |
| +020+ | 4.41 | Steve Barber | 199.7 | BAL |
| +023+ | 4.13 | Jim Maloney | 185.7 | CIN |
| +025+ | 4.06 | Ken McBride | 215.7 | ANA |
| +026+ | 4 | Jim Bouton | 177.7 | NYA |
| +028+ | 3.68 | Milt Pappas | 170 | BAL |
| +031+ | 3.58 | Camilo Pascual | 160.7 | MIN |
| +033+ | 3.48 | Don Drysdale | 237.7 | LAN |
| +038+ | 3.38 | Joe Nuxhall | 151 | CIN |
| +046+ | 3.11 | Warren Spahn | 173.7 | ATL |
| +050+ | 2.95 | John Buzhardt | 126.3 | CHA |
| +051+ | 2.92 | Dick Stigman | 181 | MIN |
| +056+ | 2.59 | Billy O'Dell | 168.3 | SFN |
| +057+ | 2.59 | Tom Cheney | 135 | TEX |
| +066+ | 2.35 | Johnny Podres | 151 | LAN |
| +068+ | 2.3 | Turk Farrell | 142.7 | HOU |
| +069+ | 2.29 | Don Schwall | 134.3 | PIT |
| +073+ | 2.23 | Ray Culp | 164.7 | PHI |
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