| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 20.91 | 196608170_CIN_LAN |
| Juan Marichal | SFN | 10.27 | 196608170_SLN_SFN |
| Jim Bunning | PHI | 7.09 | 196608170_CHN_PHI |
| Tommy John | CHA | 3.17 | 196608160_OAK_CHA |
| Al Jackson | SLN | 2.94 | 196608160_SLN_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -4.46 | 196608170_CIN_LAN |
| Jim Lonborg | BOS | -2.5 | 196608150_BAL_BOS |
| Tony Cloninger | ATL | -1.09 | 196608150_ATL_HOU |
| Camilo Pascual | MIN | -0.92 | 196608170_ANA_MIN |
| Paul Lindblad | OAK | -0.69 | 196608171_OAK_CHA |
Based on accumulated WAA for this season up to 1966-08-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.43 | Sandy Koufax | 237 | LAN |
| +006+ | 7.05 | Juan Marichal | 218.7 | SFN |
| +008+ | 6.19 | Bob Gibson | 203.7 | SLN |
| +011+ | 6.05 | Jim Bunning | 226 | PHI |
| +012+ | 5.71 | Al Jackson | 183 | SLN |
| +014+ | 5.57 | Gary Peters | 160 | CHA |
| +015+ | 5.19 | Tommy John | 163 | CHA |
| +019+ | 4.71 | Claude Osteen | 186.3 | LAN |
| +021+ | 4.39 | Mike Cuellar | 149.7 | HOU |
| +025+ | 3.87 | Gaylord Perry | 180 | SFN |
| +027+ | 3.86 | Jim Maloney | 174.7 | CIN |
| +030+ | 3.63 | Joe Horlen | 154.3 | CHA |
| +033+ | 3.58 | Steve Barber | 123.7 | BAL |
| +036+ | 3.39 | Bruce Howard | 108.7 | CHA |
| +046+ | 2.91 | Jim Perry | 122.3 | MIN |
| +045+ | 2.91 | Jim Kaat | 208.3 | MIN |
| +049+ | 2.87 | Steve Hargan | 125 | CLE |
| +053+ | 2.7 | Dennis Ribant | 138.3 | NYN |
| +055+ | 2.68 | Jim Grant | 178.7 | MIN |
| +056+ | 2.68 | Gary Bell | 198.3 | CLE |
| +060+ | 2.57 | Dave McNally | 157.7 | BAL |
| +063+ | 2.51 | Dave Boswell | 157 | MIN |
| +066+ | 2.38 | Jim Nash | 68 | OAK |
| +079+ | 2.01 | George Brunet | 160.7 | ANA |
| +085+ | 1.84 | Barry Latman | 99.3 | HOU |
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