| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Marichal | SFN | 8.54 | 196608270_LAN_SFN |
| Bob Gibson | SLN | 7.93 | 196608270_PIT_SLN |
| Jim Bunning | PHI | 6.91 | 196608290_SFN_PHI |
| Gary Peters | CHA | 6.04 | 196608270_MIN_CHA |
| Mike Cuellar | HOU | 2.87 | 196608290_HOU_PIT |
| 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 |
| Fred Talbot | NYA | -1.97 | 196608290_NYA_OAK |
Based on accumulated WAA for this season up to 1966-08-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.46 | Sandy Koufax | 255 | LAN |
| +006+ | 7.53 | Bob Gibson | 228.7 | SLN |
| +007+ | 7.4 | Juan Marichal | 236.7 | SFN |
| +008+ | 7.3 | Jim Bunning | 252 | PHI |
| +009+ | 6.77 | Gary Peters | 187 | CHA |
| +013+ | 5.72 | Mike Cuellar | 176.7 | HOU |
| +014+ | 5.58 | Tommy John | 182.7 | CHA |
| +019+ | 5.38 | Al Jackson | 195.3 | SLN |
| +023+ | 4.58 | Jim Kaat | 233.7 | MIN |
| +025+ | 4.47 | Jim Maloney | 187.3 | CIN |
| +034+ | 3.63 | Claude Osteen | 201 | LAN |
| +036+ | 3.58 | Bruce Howard | 115 | CHA |
| +038+ | 3.42 | Steve Hargan | 140 | CLE |
| +039+ | 3.38 | Jim Perry | 144.7 | MIN |
| +043+ | 3.24 | Joe Horlen | 167 | CHA |
| +045+ | 3.18 | Jim Grant | 204.7 | MIN |
| +046+ | 3.01 | Dennis Ribant | 157.7 | NYN |
| +056+ | 2.8 | Gaylord Perry | 201 | SFN |
| +061+ | 2.55 | Sonny Siebert | 213 | CLE |
| +065+ | 2.48 | Dave McNally | 178.3 | BAL |
| +069+ | 2.29 | Sam McDowell | 146.7 | CLE |
| +072+ | 2.27 | Bob Veale | 207 | PIT |
| +073+ | 2.26 | Gary Bell | 214.7 | CLE |
| +075+ | 2.2 | George Brunet | 184 | ANA |
| +076+ | 2.18 | Jim Nash | 86 | OAK |
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