| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 17.36 | 196607230_NYN_LAN |
| Bob Gibson | SLN | 6.96 | 196607230_SLN_CHN |
| Jim Bunning | PHI | 4.71 | 196607230_PHI_SFN |
| Jim Kaat | MIN | 2.34 | 196607230_MIN_BOS |
| Gary Peters | CHA | 2.29 | 196607220_CHA_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Diego Segui | TEX | -2.94 | 196607220_OAK_TEX |
| Fred Talbot | NYA | -1.95 | 196607220_ANA_NYA |
| Hank Fischer | CIN | -1.69 | 196607210_CIN_CHN |
| Ray Sadecki | SFN | -1.68 | 196607210_NYN_SFN |
| Dick Ellsworth | CHN | -1.27 | 196607220_SLN_CHN |
Based on accumulated WAA for this season up to 1966-07-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.34 | Sandy Koufax | 191.3 | LAN |
| +004+ | 6.43 | Juan Marichal | 189.3 | SFN |
| +006+ | 5.99 | Bob Gibson | 172.3 | SLN |
| +010+ | 5.08 | Claude Osteen | 164.7 | LAN |
| +014+ | 4.36 | Mike Cuellar | 116.7 | HOU |
| +016+ | 3.88 | Joe Horlen | 126 | CHA |
| +017+ | 3.87 | Al Jackson | 134.3 | SLN |
| +018+ | 3.86 | Jim Bunning | 174.7 | PHI |
| +020+ | 3.72 | Steve Barber | 122.7 | BAL |
| +024+ | 3.18 | Jim Kaat | 171.7 | MIN |
| +026+ | 3.09 | Jim Maloney | 138.7 | CIN |
| +028+ | 2.91 | George Brunet | 126 | ANA |
| +030+ | 2.9 | Gary Peters | 124.3 | CHA |
| +037+ | 2.64 | Bob Veale | 158 | PIT |
| +039+ | 2.57 | Gaylord Perry | 131 | SFN |
| +040+ | 2.56 | Woodie Fryman | 105.7 | PIT |
| +043+ | 2.44 | Tommy John | 129 | CHA |
| +052+ | 2.3 | Dennis Ribant | 100.7 | NYN |
| +054+ | 2.27 | Sonny Siebert | 145.3 | CLE |
| +059+ | 2.15 | Ray Washburn | 98.7 | SLN |
| +060+ | 2.13 | Sam McDowell | 102.7 | CLE |
| +069+ | 2.02 | Ken Johnson | 131.7 | ATL |
| +070+ | 2 | Lew Krausse | 87.3 | OAK |
| +079+ | 1.64 | Gary Bell | 153 | CLE |
| +083+ | 1.54 | Dave McNally | 124.3 | BAL |
_