| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 11.55 | 196309100_LAN_PIT |
| Bob Friend | PIT | 7.49 | 196309080_SLN_PIT |
| Gary Peters | CHA | 7.33 | 196309090_BAL_CHA |
| Larry Jackson | CHN | 4.17 | 196309080_CHN_HOU |
| Warren Spahn | ATL | 3.03 | 196309080_ATL_PHI |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jay Hook | NYN | -4.86 | 196309080_NYN_CIN |
| Jim Duckworth | TEX | -4.46 | 196309080_CLE_TEX |
| Barry Latman | CLE | -3.67 | 196309100_CLE_MIN |
| Jim Bunning | DET | -2.21 | 196309091_DET_TEX |
| Bo Belinsky | ANA | -1.63 | 196309100_BOS_ANA |
Based on accumulated WAA for this season up to 1963-09-10.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 9.99 | Sandy Koufax | 282.3 | LAN |
| +003+ | 8.53 | Dick Ellsworth | 258.3 | CHN |
| +004+ | 7.88 | Bob Friend | 250 | PIT |
| +005+ | 7.77 | Gary Peters | 221.7 | CHA |
| +012+ | 6.43 | Juan Marichal | 277 | SFN |
| +014+ | 6.17 | Larry Jackson | 247.3 | CHN |
| +017+ | 5.43 | Warren Spahn | 227.7 | ATL |
| +025+ | 4.79 | Jim Bouton | 226.3 | NYA |
| +026+ | 4.64 | Steve Barber | 239.3 | BAL |
| +027+ | 4.51 | Don Drysdale | 284.7 | LAN |
| +029+ | 4.41 | Camilo Pascual | 213.3 | MIN |
| +031+ | 4.39 | Jim Maloney | 221 | CIN |
| +032+ | 4.3 | Curt Simmons | 210.3 | SLN |
| +033+ | 4.14 | Joe Nuxhall | 190 | CIN |
| +037+ | 4.03 | Jim O'Toole | 229.3 | CIN |
| +041+ | 3.78 | Al Downing | 154.7 | NYA |
| +051+ | 3.24 | Lee Stange | 134.7 | MIN |
| +052+ | 3.21 | Milt Pappas | 209 | BAL |
| +056+ | 3.12 | Bob Veale | 48.3 | PIT |
| +055+ | 3.12 | Denny Lemaster | 212 | ATL |
| +061+ | 3 | Ray Culp | 189.3 | PHI |
| +065+ | 2.87 | Whitey Ford | 236.3 | NYA |
| +080+ | 2.5 | Bob Sadowski | 99.3 | ATL |
| +083+ | 2.44 | Ken Johnson | 196.7 | HOU |
| +084+ | 2.43 | Carl Willey | 164 | NYN |
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