| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 14.53 | 196607010_SLN_LAN |
| Jim Bunning | PHI | 10.66 | 196607020_CHN_PHI |
| Bob Gibson | SLN | 9.1 | 196607020_SLN_LAN |
| Joe Horlen | CHA | 3.73 | 196607020_BOS_CHA |
| Jim Maloney | CIN | 3.37 | 196607010_CIN_HOU |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Lonborg | BOS | -1.68 | 196606300_NYA_BOS |
| Fred Talbot | NYA | -1.5 | 196607010_NYA_TEX |
| Earl Wilson | DET | -1.36 | 196607020_OAK_DET |
| Sammy Ellis | CIN | -1.21 | 196607022_CIN_HOU |
| Denny Lemaster | ATL | -1.19 | 196607010_ATL_SFN |
Based on accumulated WAA for this season up to 1966-07-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.8 | Sandy Koufax | 152.3 | LAN |
| +004+ | 5.52 | Bob Gibson | 159 | SLN |
| +005+ | 5.36 | Juan Marichal | 155 | SFN |
| +008+ | 4.89 | Jim Bunning | 146.3 | PHI |
| +009+ | 4.24 | Mike Cuellar | 94.3 | HOU |
| +014+ | 3.75 | Al Jackson | 104.3 | SLN |
| +015+ | 3.67 | Claude Osteen | 134.7 | LAN |
| +018+ | 3.15 | Joe Horlen | 100 | CHA |
| +021+ | 3.01 | Steve Barber | 103 | BAL |
| +022+ | 2.83 | Dennis Ribant | 83.7 | NYN |
| +024+ | 2.66 | Sam McDowell | 94 | CLE |
| +027+ | 2.62 | Gaylord Perry | 96.7 | SFN |
| +029+ | 2.54 | Bob Veale | 129.7 | PIT |
| +034+ | 2.49 | Mel Stottlemyre | 132.7 | NYA |
| +038+ | 2.41 | Jim Kaat | 127 | MIN |
| +039+ | 2.4 | Pete Richert | 136.3 | TEX |
| +041+ | 2.37 | Gary Bell | 119.3 | CLE |
| +046+ | 2.16 | Jim Maloney | 109 | CIN |
| +047+ | 2.15 | Tommy John | 100.7 | CHA |
| +059+ | 1.68 | Clay Carroll | 70 | ATL |
| +061+ | 1.68 | Minnie Rojas | 37 | ANA |
| +065+ | 1.63 | Woodie Fryman | 76 | PIT |
| +072+ | 1.48 | Sonny Siebert | 121.3 | CLE |
| +078+ | 1.3 | Jim Grant | 123.7 | MIN |
| +079+ | 1.29 | Chris Short | 133 | PHI |
_