| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 12.18 | 196309170_LAN_SLN |
| Gary Peters | CHA | 6.22 | 196309182_BOS_CHA |
| Juan Marichal | SFN | 5.89 | 196309160_SFN_ATL |
| Bob Friend | PIT | 5.74 | 196309171_CHN_PIT |
| Larry Jackson | CHN | 3.74 | 196309160_CHN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dave Wickersham | OAK | -2.31 | 196309180_OAK_TEX |
| Tracy Stallard | NYN | -1.93 | 196309170_PHI_NYN |
| Bennie Daniels | TEX | -1.65 | 196309170_OAK_TEX |
| Dick Drott | HOU | -1.09 | 196309180_HOU_CIN |
| Cal Koonce | CHN | -1.08 | 196309180_CHN_PIT |
Based on accumulated WAA for this season up to 1963-09-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 10.91 | Sandy Koufax | 298.3 | LAN |
| +004+ | 8.17 | Dick Ellsworth | 272.7 | CHN |
| +007+ | 7.6 | Gary Peters | 233.7 | CHA |
| +009+ | 7.11 | Juan Marichal | 295 | SFN |
| +011+ | 6.99 | Bob Friend | 262 | PIT |
| +016+ | 6.33 | Larry Jackson | 260.3 | CHN |
| +019+ | 5.43 | Jim Bouton | 235.3 | NYA |
| +020+ | 5.27 | Camilo Pascual | 230.3 | MIN |
| +025+ | 4.95 | Steve Barber | 254.7 | BAL |
| +026+ | 4.91 | Curt Simmons | 227.3 | SLN |
| +029+ | 4.53 | Don Drysdale | 294.7 | LAN |
| +035+ | 3.93 | Jim O'Toole | 229.3 | CIN |
| +036+ | 3.91 | Jim Maloney | 236.7 | CIN |
| +039+ | 3.87 | Warren Spahn | 232 | ATL |
| +038+ | 3.87 | Al Downing | 161.7 | NYA |
| +041+ | 3.82 | Whitey Ford | 254.3 | NYA |
| +044+ | 3.78 | Joe Nuxhall | 199.3 | CIN |
| +052+ | 3.5 | Lee Stange | 151.7 | MIN |
| +053+ | 3.49 | Milt Pappas | 216 | BAL |
| +061+ | 3.1 | Ken Johnson | 205.7 | HOU |
| +063+ | 3.04 | Bob Veale | 60.7 | PIT |
| +065+ | 3.01 | Ray Culp | 203.3 | PHI |
| +075+ | 2.69 | Bob Sadowski | 112.3 | ATL |
| +081+ | 2.53 | Bob Shaw | 155 | ATL |
| +083+ | 2.5 | Carl Willey | 171 | NYN |
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