| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Marichal | SFN | 8.58 | 196608230_CIN_SFN |
| Jim Bunning | PHI | 6.62 | 196608250_PHI_PIT |
| Bob Gibson | SLN | 6.44 | 196608230_SLN_HOU |
| Gary Peters | CHA | 4.96 | 196608230_CHA_DET |
| Claude Osteen | LAN | 3.31 | 196608230_ATL_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dick Ellsworth | CHN | -2.94 | 196608230_NYN_CHN |
| Fred Talbot | NYA | -2.34 | 196608240_ANA_NYA |
| Hank Fischer | BOS | -1.51 | 196608252_OAK_BOS |
| Tony Cloninger | ATL | -1.26 | 196608240_ATL_LAN |
| Bob Shaw | NYN | -0.96 | 196608240_NYN_CHN |
Based on accumulated WAA for this season up to 1966-08-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.75 | Sandy Koufax | 246 | LAN |
| +006+ | 7.12 | Juan Marichal | 227.7 | SFN |
| +007+ | 7.04 | Bob Gibson | 219.7 | SLN |
| +008+ | 6.76 | Jim Bunning | 243 | PHI |
| +011+ | 6.48 | Gary Peters | 179 | CHA |
| +013+ | 6.11 | Al Jackson | 191 | SLN |
| +019+ | 5.02 | Mike Cuellar | 167.7 | HOU |
| +020+ | 4.98 | Tommy John | 173.7 | CHA |
| +028+ | 4.02 | Jim Maloney | 181.3 | CIN |
| +029+ | 4.01 | Jim Kaat | 224.7 | MIN |
| +030+ | 3.94 | Claude Osteen | 199.3 | LAN |
| +036+ | 3.38 | Steve Barber | 124 | BAL |
| +037+ | 3.36 | Bruce Howard | 108.7 | CHA |
| +040+ | 3.23 | Gaylord Perry | 193 | SFN |
| +043+ | 3.08 | Jim Grant | 194 | MIN |
| +044+ | 3.07 | Joe Horlen | 163.3 | CHA |
| +045+ | 3.06 | Dennis Ribant | 153 | NYN |
| +049+ | 2.94 | Jim Perry | 135.7 | MIN |
| +056+ | 2.74 | Steve Hargan | 131.7 | CLE |
| +058+ | 2.7 | Dave McNally | 172.3 | BAL |
| +062+ | 2.45 | George Brunet | 176 | ANA |
| +065+ | 2.38 | Sam McDowell | 140 | CLE |
| +077+ | 2.12 | Gary Bell | 207.7 | CLE |
| +078+ | 2.11 | Sonny Siebert | 205 | CLE |
| +080+ | 2.06 | Dave Boswell | 162.3 | MIN |
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