| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 15.61 | 196609070_SFN_LAN |
| Jim Bunning | PHI | 8.23 | 196609060_PHI_CHN |
| Bob Gibson | SLN | 6.69 | 196609051_HOU_SLN |
| Jim Maloney | CIN | 2.48 | 196609060_CIN_NYN |
| Tommy John | CHA | 2.43 | 196609060_CHA_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dick Ellsworth | CHN | -2.7 | 196609052_PHI_CHN |
| Ray Culp | PHI | -2.47 | 196609052_PHI_CHN |
| Mickey Lolich | DET | -2.24 | 196609051_TEX_DET |
| Ray Sadecki | SFN | -1.66 | 196609060_SFN_LAN |
| Milt Pappas | CIN | -1.25 | 196609051_CIN_NYN |
Based on accumulated WAA for this season up to 1966-09-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.67 | Sandy Koufax | 270 | LAN |
| +005+ | 8.53 | Juan Marichal | 254.7 | SFN |
| +007+ | 8.11 | Jim Bunning | 268 | PHI |
| +009+ | 7.57 | Bob Gibson | 241.3 | SLN |
| +010+ | 7.15 | Gary Peters | 202 | CHA |
| +014+ | 6.11 | Mike Cuellar | 186.7 | HOU |
| +020+ | 5.32 | Al Jackson | 209.3 | SLN |
| +021+ | 5.28 | Jim Kaat | 251.7 | MIN |
| +027+ | 4.82 | Tommy John | 196.7 | CHA |
| +034+ | 4.07 | Jim Maloney | 199.3 | CIN |
| +035+ | 3.97 | Claude Osteen | 207 | LAN |
| +036+ | 3.94 | Dennis Ribant | 175.7 | NYN |
| +039+ | 3.77 | Bruce Howard | 127.7 | CHA |
| +041+ | 3.73 | Jim Perry | 158.7 | MIN |
| +042+ | 3.65 | Sonny Siebert | 231 | CLE |
| +046+ | 3.35 | Jim Grant | 221.3 | MIN |
| +047+ | 3.3 | Gaylord Perry | 214 | SFN |
| +051+ | 3.09 | Joe Horlen | 173 | CHA |
| +054+ | 2.98 | Jim Nash | 97.7 | OAK |
| +057+ | 2.89 | Sam McDowell | 166.3 | CLE |
| +064+ | 2.68 | Steve Hargan | 146 | CLE |
| +066+ | 2.63 | Earl Wilson | 241 | TOT |
| +067+ | 2.57 | Gary Bell | 230.7 | CLE |
| +072+ | 2.42 | Don Sutton | 213.7 | LAN |
| +075+ | 2.39 | Dave McNally | 189 | BAL |
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