| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Marichal | SFN | 11.12 | 196608040_SFN_NYN |
| Bob Gibson | SLN | 7.45 | 196608020_CIN_SLN |
| Jim Bunning | PHI | 6.95 | 196608040_HOU_PHI |
| Claude Osteen | LAN | 5.54 | 196608040_LAN_PIT |
| Jim Maloney | CIN | 3.36 | 196608030_CIN_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -3.75 | 196608040_CIN_SLN |
| Dick Ellsworth | CHN | -3 | 196608040_ATL_CHN |
| Ray Sadecki | SFN | -2.54 | 196608020_SFN_NYN |
| Tony Cloninger | ATL | -1.78 | 196608020_ATL_CHN |
| Phil Ortega | TEX | -1.15 | 196608040_TEX_OAK |
Based on accumulated WAA for this season up to 1966-08-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.52 | Sandy Koufax | 209.3 | LAN |
| +004+ | 7.19 | Juan Marichal | 207.7 | SFN |
| +008+ | 5.83 | Bob Gibson | 186.3 | SLN |
| +010+ | 5.45 | Jim Bunning | 203.3 | PHI |
| +013+ | 4.87 | Al Jackson | 159.7 | SLN |
| +018+ | 4.55 | Joe Horlen | 141 | CHA |
| +019+ | 4.48 | Claude Osteen | 176.7 | LAN |
| +020+ | 3.91 | Jim Maloney | 164.7 | CIN |
| +021+ | 3.87 | Mike Cuellar | 129.7 | HOU |
| +022+ | 3.7 | Gary Peters | 133.3 | CHA |
| +024+ | 3.48 | Steve Barber | 123.7 | BAL |
| +025+ | 3.47 | Bob Veale | 167 | PIT |
| +029+ | 3.25 | Tommy John | 138 | CHA |
| +033+ | 3.21 | Jim Kaat | 189 | MIN |
| +045+ | 2.79 | Gaylord Perry | 156 | SFN |
| +048+ | 2.74 | Bruce Howard | 96.3 | CHA |
| +049+ | 2.7 | George Brunet | 143 | ANA |
| +055+ | 2.42 | Gary Bell | 176.7 | CLE |
| +056+ | 2.35 | Dennis Ribant | 123.3 | NYN |
| +059+ | 2.28 | Sonny Siebert | 170 | CLE |
| +060+ | 2.28 | Mel Stottlemyre | 183 | NYA |
| +063+ | 2.18 | Dave Boswell | 152 | MIN |
| +065+ | 2.13 | Ken Johnson | 153.3 | ATL |
| +074+ | 1.88 | Jim O'Toole | 89 | CIN |
| +076+ | 1.75 | Dave McNally | 138.7 | BAL |
_