| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 19.16 | 196608010_LAN_PIT |
| Bob Gibson | SLN | 7.45 | 196608020_CIN_SLN |
| Jim Bunning | PHI | 6.63 | 196607311_PHI_PIT |
| Joe Horlen | CHA | 4.43 | 196607311_NYA_CHA |
| Sam McDowell | CLE | 2.14 | 196608020_BAL_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Sadecki | SFN | -2.54 | 196608020_SFN_NYN |
| Tony Cloninger | ATL | -1.78 | 196608020_ATL_CHN |
| Hank Fischer | CIN | -1.74 | 196607312_HOU_CIN |
| Fred Talbot | NYA | -1.72 | 196608010_NYA_ANA |
| Bob Buhl | PHI | -1.36 | 196607312_PHI_PIT |
Based on accumulated WAA for this season up to 1966-08-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.45 | Sandy Koufax | 209.3 | LAN |
| +004+ | 7.13 | Juan Marichal | 199.7 | SFN |
| +007+ | 5.92 | Bob Gibson | 186.3 | SLN |
| +011+ | 5.13 | Jim Bunning | 194.7 | PHI |
| +012+ | 4.94 | Claude Osteen | 175.3 | LAN |
| +016+ | 4.52 | Joe Horlen | 141 | CHA |
| +018+ | 4.41 | Al Jackson | 150.7 | SLN |
| +020+ | 3.83 | Mike Cuellar | 129.7 | HOU |
| +021+ | 3.68 | Gary Peters | 133.3 | CHA |
| +023+ | 3.44 | Steve Barber | 123.7 | BAL |
| +028+ | 3.23 | Tommy John | 138 | CHA |
| +033+ | 3.11 | Jim Maloney | 154 | CIN |
| +039+ | 2.85 | Dennis Ribant | 117 | NYN |
| +044+ | 2.71 | Bob Veale | 158 | PIT |
| +045+ | 2.71 | Sonny Siebert | 162.7 | CLE |
| +047+ | 2.68 | George Brunet | 143 | ANA |
| +049+ | 2.64 | Jim Kaat | 180 | MIN |
| +055+ | 2.45 | Bruce Howard | 88 | CHA |
| +057+ | 2.24 | Gaylord Perry | 147 | SFN |
| +068+ | 1.92 | Jim O'Toole | 89 | CIN |
| +072+ | 1.86 | Gary Bell | 167.7 | CLE |
| +074+ | 1.82 | Dave Boswell | 143 | MIN |
| +078+ | 1.76 | Larry Jackson | 153.7 | TOT |
| +081+ | 1.7 | Dave McNally | 138.7 | BAL |
| +082+ | 1.69 | Jim Perry | 99.3 | MIN |
_