| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 20.91 | 196608170_CIN_LAN |
| Juan Marichal | SFN | 10.27 | 196608170_SLN_SFN |
| Jim Bunning | PHI | 7.09 | 196608170_CHN_PHI |
| Bob Gibson | SLN | 6.82 | 196608180_SLN_LAN |
| Gary Peters | CHA | 4.91 | 196608180_CHA_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -4.46 | 196608170_CIN_LAN |
| Bob Bruce | HOU | -2.54 | 196608180_CIN_HOU |
| Rob Gardner | NYN | -1.22 | 196608180_PIT_NYN |
| Camilo Pascual | MIN | -0.92 | 196608170_ANA_MIN |
| Tommie Sisk | PIT | -0.69 | 196608160_PIT_NYN |
Based on accumulated WAA for this season up to 1966-08-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.4 | Sandy Koufax | 237 | LAN |
| +006+ | 7.02 | Juan Marichal | 218.7 | SFN |
| +008+ | 6.35 | Bob Gibson | 210.7 | SLN |
| +011+ | 6.02 | Jim Bunning | 226 | PHI |
| +012+ | 5.73 | Gary Peters | 167 | CHA |
| +013+ | 5.7 | Al Jackson | 183 | SLN |
| +015+ | 5.18 | Tommy John | 163 | CHA |
| +019+ | 4.69 | Claude Osteen | 186.3 | LAN |
| +022+ | 4.37 | Mike Cuellar | 149.7 | HOU |
| +025+ | 3.99 | Jim Maloney | 181.3 | CIN |
| +028+ | 3.85 | Gaylord Perry | 180 | SFN |
| +031+ | 3.62 | Joe Horlen | 154.3 | CHA |
| +033+ | 3.56 | Steve Barber | 123.7 | BAL |
| +037+ | 3.39 | Bruce Howard | 108.7 | CHA |
| +039+ | 3.24 | Jim Grant | 188 | MIN |
| +046+ | 2.88 | Jim Perry | 122.3 | MIN |
| +048+ | 2.88 | Jim Kaat | 208.3 | MIN |
| +049+ | 2.85 | Steve Hargan | 125 | CLE |
| +054+ | 2.69 | Dennis Ribant | 138.3 | NYN |
| +055+ | 2.66 | Gary Bell | 198.3 | CLE |
| +060+ | 2.55 | Dave McNally | 157.7 | BAL |
| +062+ | 2.48 | Dave Boswell | 157 | MIN |
| +066+ | 2.37 | Jim Nash | 68 | OAK |
| +080+ | 2.01 | George Brunet | 160.7 | ANA |
| +083+ | 1.88 | Sam McDowell | 131 | CLE |
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