| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Marichal | SFN | 8.58 | 196608230_CIN_SFN |
| Bob Gibson | SLN | 6.44 | 196608230_SLN_HOU |
| Gary Peters | CHA | 4.96 | 196608230_CHA_DET |
| Claude Osteen | LAN | 3.31 | 196608230_ATL_LAN |
| Mike Cuellar | HOU | 2.28 | 196608240_SLN_HOU |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -3.9 | 196608220_CIN_SFN |
| Dick Ellsworth | CHN | -2.94 | 196608230_NYN_CHN |
| Bob Bruce | HOU | -2.64 | 196608220_SLN_HOU |
| Fred Talbot | NYA | -2.34 | 196608240_ANA_NYA |
| Bob Buhl | PHI | -1.94 | 196608220_PHI_PIT |
Based on accumulated WAA for this season up to 1966-08-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.76 | Sandy Koufax | 246 | LAN |
| +006+ | 7.13 | Juan Marichal | 227.7 | SFN |
| +007+ | 7.05 | Bob Gibson | 219.7 | SLN |
| +010+ | 6.47 | Gary Peters | 179 | CHA |
| +012+ | 6.23 | Jim Bunning | 234 | PHI |
| +013+ | 6.12 | Al Jackson | 191 | SLN |
| +019+ | 5.03 | Mike Cuellar | 167.7 | HOU |
| +020+ | 4.98 | Tommy John | 173.7 | CHA |
| +028+ | 4.03 | Jim Maloney | 181.3 | CIN |
| +029+ | 4.02 | Jim Kaat | 224.7 | MIN |
| +030+ | 3.95 | Claude Osteen | 199.3 | LAN |
| +033+ | 3.8 | Joe Horlen | 162 | CHA |
| +037+ | 3.4 | Steve Barber | 124 | BAL |
| +038+ | 3.36 | Bruce Howard | 108.7 | CHA |
| +040+ | 3.24 | Gaylord Perry | 193 | SFN |
| +044+ | 3.09 | Jim Grant | 194 | MIN |
| +045+ | 3.06 | Dennis Ribant | 153 | NYN |
| +046+ | 2.95 | Jim Perry | 135.7 | MIN |
| +053+ | 2.76 | Steve Hargan | 131.7 | CLE |
| +058+ | 2.6 | Dave McNally | 165.7 | BAL |
| +064+ | 2.4 | Sam McDowell | 140 | CLE |
| +066+ | 2.31 | Gary Bell | 204.7 | CLE |
| +075+ | 2.13 | Sonny Siebert | 205 | CLE |
| +077+ | 2.07 | Dave Boswell | 162.3 | MIN |
| +085+ | 1.92 | George Brunet | 167 | ANA |
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