| 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 |
| Gary Peters | CHA | 6.04 | 196608270_MIN_CHA |
| Jim Maloney | CIN | 2.81 | 196608280_PHI_CIN |
| 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 1966-08-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.49 | Sandy Koufax | 255 | LAN |
| +006+ | 7.56 | Bob Gibson | 228.7 | SLN |
| +007+ | 7.43 | Juan Marichal | 236.7 | SFN |
| +008+ | 6.81 | Jim Bunning | 243 | PHI |
| +009+ | 6.81 | Gary Peters | 187 | CHA |
| +016+ | 5.4 | Al Jackson | 195.3 | SLN |
| +020+ | 5 | Mike Cuellar | 167.7 | HOU |
| +021+ | 4.87 | Tommy John | 173.7 | CHA |
| +022+ | 4.63 | Jim Kaat | 233.7 | MIN |
| +026+ | 4.5 | Jim Maloney | 187.3 | CIN |
| +031+ | 3.94 | Claude Osteen | 199.3 | LAN |
| +036+ | 3.6 | Bruce Howard | 115 | CHA |
| +038+ | 3.44 | Steve Hargan | 140 | CLE |
| +041+ | 3.27 | Joe Horlen | 167 | CHA |
| +042+ | 3.22 | Jim Grant | 204.7 | MIN |
| +045+ | 3.05 | Dennis Ribant | 157.7 | NYN |
| +054+ | 2.85 | Jim Perry | 135.7 | MIN |
| +055+ | 2.82 | Gaylord Perry | 201 | SFN |
| +057+ | 2.66 | Dave McNally | 172.3 | BAL |
| +061+ | 2.57 | Sonny Siebert | 213 | CLE |
| +067+ | 2.41 | George Brunet | 176 | ANA |
| +069+ | 2.31 | Sam McDowell | 146.7 | CLE |
| +074+ | 2.19 | Jim Nash | 86 | OAK |
| +078+ | 2.13 | Gary Bell | 207.7 | CLE |
| +085+ | 1.96 | Dave Boswell | 162.3 | MIN |
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