| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 20.08 | 196608050_LAN_HOU |
| Bob Gibson | SLN | 6.91 | 196608071_SLN_NYN |
| Joe Horlen | CHA | 4.93 | 196608070_CHA_ANA |
| Bob Veale | PIT | 3.43 | 196608070_CIN_PIT |
| Mel Stottlemyre | NYA | 1.89 | 196608071_NYA_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tony Cloninger | ATL | -2.03 | 196608070_ATL_PHI |
| Jim Lonborg | BOS | -1.86 | 196608071_BOS_DET |
| Fred Talbot | NYA | -1.76 | 196608051_NYA_CLE |
| Bill Monbouquette | DET | -1.41 | 196608071_BOS_DET |
| Bob Buhl | PHI | -1.31 | 196608050_ATL_PHI |
Based on accumulated WAA for this season up to 1966-08-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.88 | Sandy Koufax | 215.3 | LAN |
| +004+ | 7.29 | Juan Marichal | 207.7 | SFN |
| +006+ | 6.4 | Bob Gibson | 194.7 | SLN |
| +011+ | 5.53 | Jim Bunning | 203.3 | PHI |
| +014+ | 4.84 | Al Jackson | 166 | SLN |
| +018+ | 4.49 | Gary Peters | 142.3 | CHA |
| +019+ | 4.41 | Claude Osteen | 177.7 | LAN |
| +020+ | 4.37 | Joe Horlen | 146 | CHA |
| +022+ | 4.03 | Tommy John | 147 | CHA |
| +023+ | 3.99 | Jim Maloney | 164.7 | CIN |
| +024+ | 3.87 | Mike Cuellar | 136.7 | HOU |
| +025+ | 3.54 | Steve Barber | 123.7 | BAL |
| +032+ | 3.3 | Jim Kaat | 189 | MIN |
| +043+ | 2.76 | Bruce Howard | 96.3 | CHA |
| +046+ | 2.61 | Bob Veale | 171 | PIT |
| +047+ | 2.55 | Dave McNally | 147.7 | BAL |
| +049+ | 2.53 | George Brunet | 148 | ANA |
| +050+ | 2.51 | Gaylord Perry | 162 | SFN |
| +053+ | 2.48 | Gary Bell | 176.7 | CLE |
| +054+ | 2.47 | Dave Boswell | 157 | MIN |
| +057+ | 2.39 | Dennis Ribant | 123.3 | NYN |
| +066+ | 2.19 | Ken Johnson | 153.3 | ATL |
| +069+ | 2.12 | Pete Richert | 189.7 | TEX |
| +070+ | 2.07 | Jim Grant | 164.7 | MIN |
| +071+ | 2.06 | Sonny Siebert | 176.7 | CLE |
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