| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 10.07 | 196308210_SLN_LAN |
| Dick Ellsworth | CHN | 8.69 | 196308210_PIT_CHN |
| Bob Friend | PIT | 7.98 | 196308220_PIT_CHN |
| Juan Marichal | SFN | 6.96 | 196308220_ATL_SFN |
| Gary Peters | CHA | 5.63 | 196308210_CHA_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dick Donovan | CLE | -2.26 | 196308200_CLE_NYA |
| Jim Duckworth | TEX | -2.13 | 196308202_TEX_OAK |
| Roger Craig | NYN | -1.42 | 196308202_NYN_PHI |
| Dave Morehead | BOS | -1.29 | 196308220_CHA_BOS |
| Dave McNally | BAL | -1.25 | 196308220_ANA_BAL |
Based on accumulated WAA for this season up to 1963-08-22.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 8.13 | Sandy Koufax | 238.7 | LAN |
| +003+ | 7.45 | Dick Ellsworth | 225.7 | CHN |
| +005+ | 6.85 | Larry Jackson | 228.7 | CHN |
| +007+ | 6.74 | Bob Friend | 222 | PIT |
| +008+ | 6.72 | Gary Peters | 180.3 | CHA |
| +010+ | 6.23 | Juan Marichal | 246.3 | SFN |
| +013+ | 5.07 | Juan Pizarro | 199 | CHA |
| +021+ | 4.56 | Steve Barber | 213.3 | BAL |
| +022+ | 4.55 | Jim Maloney | 192.7 | CIN |
| +026+ | 4.12 | Don Drysdale | 254 | LAN |
| +029+ | 3.98 | Camilo Pascual | 177.7 | MIN |
| +030+ | 3.9 | Jim Bouton | 186 | NYA |
| +032+ | 3.75 | Jim O'Toole | 203.3 | CIN |
| +037+ | 3.52 | Joe Nuxhall | 162.3 | CIN |
| +038+ | 3.49 | Warren Spahn | 182.7 | ATL |
| +041+ | 3.42 | Ken McBride | 222 | ANA |
| +052+ | 3.01 | John Buzhardt | 126.3 | CHA |
| +054+ | 2.93 | Milt Pappas | 172.7 | BAL |
| +055+ | 2.91 | Curt Simmons | 181.3 | SLN |
| +062+ | 2.69 | Tom Cheney | 136 | TEX |
| +063+ | 2.66 | Billy O'Dell | 168.3 | SFN |
| +066+ | 2.61 | Turk Farrell | 150.7 | HOU |
| +073+ | 2.41 | Al Downing | 121.7 | NYA |
| +074+ | 2.4 | Denny Lemaster | 187.3 | ATL |
| +080+ | 2.23 | Ray Culp | 167 | PHI |
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