| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 19.04 | 196608210_SLN_LAN |
| Juan Marichal | SFN | 8.58 | 196608230_CIN_SFN |
| Jim Bunning | PHI | 7.1 | 196608212_NYN_PHI |
| Bob Gibson | SLN | 6.44 | 196608230_SLN_HOU |
| Gary Peters | CHA | 4.96 | 196608230_CHA_DET |
| 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 |
| Jim Lonborg | BOS | -2.01 | 196608210_MIN_BOS |
| Bob Buhl | PHI | -1.94 | 196608220_PHI_PIT |
Based on accumulated WAA for this season up to 1966-08-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.78 | Sandy Koufax | 246 | LAN |
| +006+ | 7.11 | Juan Marichal | 227.7 | SFN |
| +007+ | 7.02 | Bob Gibson | 219.7 | SLN |
| +010+ | 6.45 | Gary Peters | 179 | CHA |
| +012+ | 6.21 | Jim Bunning | 234 | PHI |
| +013+ | 6.09 | Al Jackson | 191 | SLN |
| +015+ | 5.66 | Tommy John | 172 | CHA |
| +021+ | 4.69 | Mike Cuellar | 158.7 | HOU |
| +025+ | 4.36 | Gaylord Perry | 189 | SFN |
| +028+ | 4.03 | Jim Kaat | 224.7 | MIN |
| +029+ | 4.02 | Jim Maloney | 181.3 | CIN |
| +030+ | 3.97 | Claude Osteen | 199.3 | LAN |
| +033+ | 3.78 | Joe Horlen | 162 | CHA |
| +037+ | 3.39 | Steve Barber | 124 | BAL |
| +038+ | 3.35 | Bruce Howard | 108.7 | CHA |
| +043+ | 3.16 | Jim Perry | 130.7 | MIN |
| +045+ | 3.1 | Jim Grant | 194 | MIN |
| +046+ | 3.04 | Dennis Ribant | 153 | NYN |
| +052+ | 2.75 | Steve Hargan | 131.7 | CLE |
| +057+ | 2.59 | Dave McNally | 165.7 | BAL |
| +067+ | 2.39 | Sam McDowell | 140 | CLE |
| +068+ | 2.3 | Gary Bell | 204.7 | CLE |
| +075+ | 2.17 | Sonny Siebert | 198 | CLE |
| +078+ | 2.08 | Dave Boswell | 162.3 | MIN |
| +085+ | 1.91 | George Brunet | 167 | ANA |
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