| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 15.83 | 196607050_CIN_LAN |
| Jim Bunning | PHI | 9.35 | 196607060_NYN_PHI |
| Joe Horlen | CHA | 4.79 | 196607062_CHA_TEX |
| Sam McDowell | CLE | 3.97 | 196607060_MIN_CLE |
| Jim Maloney | CIN | 3.86 | 196607050_CIN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Sadecki | SFN | -2.33 | 196607070_CIN_SFN |
| Fred Talbot | NYA | -2.13 | 196607050_BOS_NYA |
| Earl Wilson | DET | -1.47 | 196607060_ANA_DET |
| Sammy Ellis | CIN | -1.37 | 196607070_CIN_SFN |
| Denny Lemaster | ATL | -1.24 | 196607050_ATL_HOU |
Based on accumulated WAA for this season up to 1966-07-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.61 | Sandy Koufax | 161.3 | LAN |
| +005+ | 5.63 | Bob Gibson | 159 | SLN |
| +008+ | 4.98 | Jim Bunning | 151.7 | PHI |
| +009+ | 4.84 | Juan Marichal | 163 | SFN |
| +010+ | 4.57 | Al Jackson | 113.3 | SLN |
| +011+ | 4.47 | Claude Osteen | 143.7 | LAN |
| +014+ | 4.07 | Mike Cuellar | 99.3 | HOU |
| +017+ | 3.77 | Steve Barber | 112 | BAL |
| +020+ | 3.39 | Joe Horlen | 107 | CHA |
| +022+ | 2.99 | Gaylord Perry | 105.7 | SFN |
| +025+ | 2.87 | Sam McDowell | 101 | CLE |
| +031+ | 2.58 | Dennis Ribant | 87.7 | NYN |
| +032+ | 2.56 | Jim Maloney | 115 | CIN |
| +038+ | 2.44 | Woodie Fryman | 85 | PIT |
| +039+ | 2.42 | Bob Veale | 142 | PIT |
| +042+ | 2.34 | Jim Kaat | 135.3 | MIN |
| +046+ | 2.17 | George Brunet | 106 | ANA |
| +047+ | 2.15 | Tommy John | 115 | CHA |
| +049+ | 2.14 | Gary Peters | 99.3 | CHA |
| +052+ | 2.07 | Minnie Rojas | 41.7 | ANA |
| +053+ | 2.04 | Mel Stottlemyre | 139.7 | NYA |
| +070+ | 1.59 | Ken Johnson | 112 | ATL |
| +071+ | 1.56 | Sonny Siebert | 121.3 | CLE |
| +074+ | 1.47 | Don Schwall | 49.3 | TOT |
| +075+ | 1.44 | Bobby Bolin | 110 | SFN |
_