| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 11.07 | 196309021_HOU_LAN |
| Dick Ellsworth | CHN | 9.08 | 196309021_CHN_SFN |
| Bob Friend | PIT | 7.65 | 196308310_CIN_PIT |
| Gary Peters | CHA | 7.51 | 196309021_ANA_CHA |
| Jim Bouton | NYA | 2.81 | 196308310_NYA_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jay Hook | NYN | -6.27 | 196309022_CIN_NYN |
| Barry Latman | CLE | -3.31 | 196309022_TEX_CLE |
| Bennie Daniels | TEX | -1.93 | 196309010_TEX_BOS |
| Dave Wickersham | OAK | -1.44 | 196309021_OAK_MIN |
| Mike McCormick | BAL | -0.98 | 196309010_NYA_BAL |
Based on accumulated WAA for this season up to 1963-09-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 9.27 | Sandy Koufax | 265.3 | LAN |
| +003+ | 8.21 | Dick Ellsworth | 249.7 | CHN |
| +004+ | 7.58 | Gary Peters | 205.7 | CHA |
| +005+ | 7.55 | Bob Friend | 236 | PIT |
| +010+ | 6.14 | Larry Jackson | 237 | CHN |
| +011+ | 5.99 | Juan Marichal | 261 | SFN |
| +015+ | 5.39 | Juan Pizarro | 215 | CHA |
| +018+ | 5 | Jim Bouton | 212 | NYA |
| +021+ | 4.83 | Jim O'Toole | 218.3 | CIN |
| +022+ | 4.76 | Camilo Pascual | 196.7 | MIN |
| +023+ | 4.71 | Steve Barber | 227.3 | BAL |
| +024+ | 4.69 | Don Drysdale | 271 | LAN |
| +031+ | 4.4 | Warren Spahn | 209.7 | ATL |
| +034+ | 4.12 | Jim Maloney | 212.3 | CIN |
| +038+ | 3.68 | Al Downing | 139.7 | NYA |
| +047+ | 3.1 | Joe Nuxhall | 172 | CIN |
| +050+ | 3.07 | Milt Pappas | 197 | BAL |
| +055+ | 2.99 | Denny Lemaster | 200 | ATL |
| +057+ | 2.97 | Lee Stange | 126 | MIN |
| +063+ | 2.84 | Curt Simmons | 192.3 | SLN |
| +064+ | 2.8 | Tom Cheney | 136.7 | TEX |
| +071+ | 2.53 | Don Cardwell | 197.7 | PIT |
| +074+ | 2.5 | Ken McBride | 239.7 | ANA |
| +075+ | 2.47 | Whitey Ford | 227.3 | NYA |
| +078+ | 2.45 | Billy O'Dell | 188.7 | SFN |
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