| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 12.39 | 196606180_SFN_LAN |
| Jim Bunning | PHI | 9.23 | 196606191_PHI_SLN |
| Bob Gibson | SLN | 7 | 196606192_PHI_SLN |
| Jim Maloney | CIN | 5.53 | 196606180_NYN_CIN |
| Mel Stottlemyre | NYA | 5.26 | 196606170_DET_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Diego Segui | TEX | -2.53 | 196606170_CLE_TEX |
| Sammy Ellis | CIN | -2.52 | 196606192_NYN_CIN |
| Wade Blasingame | ATL | -2.44 | 196606180_PIT_ATL |
| Earl Wilson | DET | -1.73 | 196606170_DET_NYA |
| Jack Fisher | NYN | -1.43 | 196606172_NYN_CIN |
Based on accumulated WAA for this season up to 1966-06-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.6 | Sandy Koufax | 126.3 | LAN |
| +003+ | 5.31 | Juan Marichal | 129 | SFN |
| +004+ | 5.08 | Bob Gibson | 136 | SLN |
| +007+ | 4.62 | Jim Bunning | 125.7 | PHI |
| +009+ | 3.43 | Tommy John | 96.3 | CHA |
| +012+ | 2.82 | Mel Stottlemyre | 114.3 | NYA |
| +013+ | 2.77 | Mike Cuellar | 71 | HOU |
| +014+ | 2.76 | Claude Osteen | 112 | LAN |
| +019+ | 2.61 | Jim Maloney | 91.3 | CIN |
| +020+ | 2.57 | Al Jackson | 77.3 | SLN |
| +026+ | 2.4 | Pete Richert | 114 | TEX |
| +028+ | 2.34 | Dennis Ribant | 67.7 | NYN |
| +031+ | 2.12 | Phil Ortega | 100.3 | TEX |
| +041+ | 1.87 | Joe Horlen | 76.7 | CHA |
| +044+ | 1.71 | Steve Barber | 81.7 | BAL |
| +049+ | 1.62 | Jim Kaat | 106 | MIN |
| +050+ | 1.61 | Bob Veale | 111.7 | PIT |
| +052+ | 1.59 | Sam McDowell | 79 | CLE |
| +053+ | 1.59 | Chris Short | 119.3 | PHI |
| +054+ | 1.57 | Gary Bell | 94.7 | CLE |
| +057+ | 1.51 | Juan Pizarro | 40.3 | CHA |
| +062+ | 1.44 | Dick Ellsworth | 102.3 | CHN |
| +064+ | 1.4 | Hank Aguirre | 53.3 | DET |
| +067+ | 1.37 | Clay Carroll | 56 | ATL |
| +066+ | 1.37 | Whitey Ford | 40 | NYA |
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