| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 13.5 | 196606260_LAN_ATL |
| Jim Bunning | PHI | 9.82 | 196606280_PHI_NYN |
| Bob Gibson | SLN | 9.25 | 196606270_SFN_SLN |
| Jim Maloney | CIN | 5.01 | 196606260_SFN_CIN |
| Bob Veale | PIT | 4.06 | 196606280_HOU_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Fred Talbot | NYA | -1.93 | 196606261_CHA_NYA |
| Denny Lemaster | ATL | -1.73 | 196606260_LAN_ATL |
| Sammy Ellis | CIN | -1.7 | 196606280_LAN_CIN |
| Jim Hannan | TEX | -1.57 | 196606262_TEX_BOS |
| Earl Wilson | DET | -1.54 | 196606280_DET_ANA |
Based on accumulated WAA for this season up to 1966-06-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.55 | Sandy Koufax | 144.3 | LAN |
| +002+ | 5.96 | Bob Gibson | 152 | SLN |
| +004+ | 5.41 | Jim Bunning | 142.7 | PHI |
| +007+ | 5.11 | Juan Marichal | 147 | SFN |
| +011+ | 3.56 | Mike Cuellar | 83.3 | HOU |
| +012+ | 3.53 | Claude Osteen | 128 | LAN |
| +019+ | 2.99 | Al Jackson | 95.3 | SLN |
| +022+ | 2.74 | Steve Barber | 97.3 | BAL |
| +023+ | 2.67 | Dennis Ribant | 76.7 | NYN |
| +027+ | 2.52 | Mel Stottlemyre | 126 | NYA |
| +030+ | 2.49 | Jim Kaat | 121 | MIN |
| +029+ | 2.49 | Bob Veale | 129.7 | PIT |
| +032+ | 2.45 | Joe Horlen | 91 | CHA |
| +038+ | 2.27 | Pete Richert | 130 | TEX |
| +041+ | 2.18 | Tommy John | 100.7 | CHA |
| +045+ | 2.1 | Gaylord Perry | 87.7 | SFN |
| +048+ | 1.93 | Sam McDowell | 85 | CLE |
| +049+ | 1.84 | Gary Bell | 110.3 | CLE |
| +053+ | 1.79 | Jim Maloney | 102 | CIN |
| +056+ | 1.65 | Denny McLain | 126 | DET |
| +057+ | 1.65 | Dave Wickersham | 66.7 | DET |
| +059+ | 1.63 | Clay Carroll | 67 | ATL |
| +072+ | 1.34 | Minnie Rojas | 33 | ANA |
| +073+ | 1.33 | Whitey Ford | 42 | NYA |
| +075+ | 1.3 | Gary Peters | 89.7 | CHA |
_