| Starter | Tm | Tier | Game |
|---|---|---|---|
| Gary Peters | CHA | 3.93 | 196608100_CHA_OAK |
| Bob Veale | PIT | 2.22 | 196608120_PIT_CIN |
| Al Jackson | SLN | 2.07 | 196608110_PHI_SLN |
| Mike Cuellar | HOU | 1.63 | 196608120_HOU_SFN |
| Jim Kaat | MIN | 1.47 | 196608110_MIN_ANA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -3.53 | 196608120_PIT_CIN |
| Jim Lonborg | BOS | -2.76 | 196608110_CLE_BOS |
| Fred Talbot | NYA | -2.24 | 196608100_BAL_NYA |
| Bob Bruce | HOU | -1.52 | 196608111_HOU_CHN |
| Bill Monbouquette | DET | -1.33 | 196608120_DET_BOS |
Based on accumulated WAA for this season up to 1966-08-12.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.27 | Sandy Koufax | 223.7 | LAN |
| +003+ | 7.39 | Juan Marichal | 207.7 | SFN |
| +007+ | 6.46 | Bob Gibson | 194.7 | SLN |
| +012+ | 5.58 | Jim Bunning | 210.3 | PHI |
| +013+ | 5.44 | Al Jackson | 175 | SLN |
| +016+ | 4.83 | Tommy John | 156 | CHA |
| +015+ | 4.83 | Gary Peters | 151 | CHA |
| +019+ | 4.66 | Claude Osteen | 179.7 | LAN |
| +022+ | 4.41 | Joe Horlen | 146 | CHA |
| +023+ | 4.37 | Mike Cuellar | 144.7 | HOU |
| +030+ | 3.58 | Steve Barber | 123.7 | BAL |
| +032+ | 3.35 | Jim Maloney | 169.7 | CIN |
| +033+ | 3.33 | Gaylord Perry | 171 | SFN |
| +039+ | 3.11 | Bruce Howard | 102.7 | CHA |
| +044+ | 2.9 | Jim Grant | 173.7 | MIN |
| +046+ | 2.79 | Jim Kaat | 199.3 | MIN |
| +047+ | 2.75 | Gary Bell | 191.3 | CLE |
| +054+ | 2.54 | Dennis Ribant | 129.3 | NYN |
| +055+ | 2.53 | Dave Boswell | 157 | MIN |
| +056+ | 2.51 | Dave McNally | 151.7 | BAL |
| +059+ | 2.45 | George Brunet | 154 | ANA |
| +064+ | 2.34 | Pete Richert | 197.7 | TEX |
| +072+ | 2.15 | Jim Perry | 113.3 | MIN |
| +075+ | 2.04 | Woodie Fryman | 128.7 | PIT |
| +077+ | 1.99 | Steve Hargan | 109.3 | CLE |
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