| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 19.37 | 196608260_LAN_SFN |
| Juan Marichal | SFN | 8.54 | 196608270_LAN_SFN |
| Bob Gibson | SLN | 7.93 | 196608270_PIT_SLN |
| Jim Bunning | PHI | 6.62 | 196608250_PHI_PIT |
| Gary Peters | CHA | 6.04 | 196608270_MIN_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -4.05 | 196608271_PHI_CIN |
| Dick Ellsworth | CHN | -3.13 | 196608270_CHN_HOU |
| Jim Lonborg | BOS | -2.38 | 196608270_BOS_BAL |
| Bob Bruce | HOU | -2.33 | 196608270_CHN_HOU |
| Ray Culp | PHI | -1.22 | 196608272_PHI_CIN |
Based on accumulated WAA for this season up to 1966-08-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.52 | Sandy Koufax | 255 | LAN |
| +006+ | 7.58 | Bob Gibson | 228.7 | SLN |
| +007+ | 7.45 | Juan Marichal | 236.7 | SFN |
| +008+ | 6.93 | Gary Peters | 187 | CHA |
| +009+ | 6.81 | Jim Bunning | 243 | PHI |
| +016+ | 5.42 | Al Jackson | 195.3 | SLN |
| +020+ | 5.02 | Mike Cuellar | 167.7 | HOU |
| +021+ | 4.99 | Tommy John | 173.7 | CHA |
| +022+ | 4.77 | Jim Kaat | 233.7 | MIN |
| +029+ | 4.02 | Jim Maloney | 181.3 | CIN |
| +030+ | 3.95 | Claude Osteen | 199.3 | LAN |
| +036+ | 3.45 | Steve Hargan | 140 | CLE |
| +038+ | 3.36 | Bruce Howard | 108.7 | CHA |
| +041+ | 3.23 | Gaylord Perry | 193 | SFN |
| +045+ | 3.08 | Dennis Ribant | 153 | NYN |
| +044+ | 3.08 | Joe Horlen | 163.3 | CHA |
| +046+ | 3.07 | Jim Grant | 194 | MIN |
| +051+ | 2.94 | Jim Perry | 135.7 | MIN |
| +058+ | 2.67 | Dave McNally | 172.3 | BAL |
| +064+ | 2.43 | George Brunet | 176 | ANA |
| +066+ | 2.32 | Sam McDowell | 146.7 | CLE |
| +072+ | 2.14 | Gary Bell | 207.7 | CLE |
| +073+ | 2.13 | Sonny Siebert | 205 | CLE |
| +078+ | 2.05 | Dave Boswell | 162.3 | MIN |
| +089+ | 1.84 | Barry Latman | 99.7 | HOU |
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