| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 20.91 | 196608170_CIN_LAN |
| Juan Marichal | SFN | 10.27 | 196608170_SLN_SFN |
| Jim Bunning | PHI | 7.09 | 196608170_CHN_PHI |
| Bob Gibson | SLN | 6.82 | 196608180_SLN_LAN |
| Gary Peters | CHA | 4.91 | 196608180_CHA_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -4.46 | 196608170_CIN_LAN |
| Dick Ellsworth | CHN | -3.05 | 196608190_PIT_CHN |
| Bob Bruce | HOU | -2.54 | 196608180_CIN_HOU |
| Fred Talbot | NYA | -2.52 | 196608191_OAK_NYA |
| Rob Gardner | NYN | -1.22 | 196608180_PIT_NYN |
Based on accumulated WAA for this season up to 1966-08-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.4 | Sandy Koufax | 237 | LAN |
| +006+ | 7.02 | Juan Marichal | 218.7 | SFN |
| +009+ | 6.34 | Bob Gibson | 210.7 | SLN |
| +011+ | 6 | Jim Bunning | 226 | PHI |
| +012+ | 5.72 | Gary Peters | 167 | CHA |
| +013+ | 5.7 | Al Jackson | 183 | SLN |
| +016+ | 5.18 | Tommy John | 163 | CHA |
| +024+ | 4.37 | Mike Cuellar | 149.7 | HOU |
| +023+ | 4.37 | Claude Osteen | 192.7 | LAN |
| +025+ | 3.99 | Jim Maloney | 181.3 | CIN |
| +029+ | 3.85 | Gaylord Perry | 180 | SFN |
| +031+ | 3.83 | Joe Horlen | 162 | CHA |
| +033+ | 3.57 | Steve Barber | 123.7 | BAL |
| +037+ | 3.38 | Bruce Howard | 108.7 | CHA |
| +040+ | 3.28 | Jim Kaat | 215.7 | MIN |
| +041+ | 3.23 | Jim Grant | 188 | MIN |
| +047+ | 2.88 | Jim Perry | 122.3 | MIN |
| +048+ | 2.84 | Steve Hargan | 125 | CLE |
| +054+ | 2.63 | Gary Bell | 198.3 | CLE |
| +057+ | 2.56 | Dave McNally | 157.7 | BAL |
| +060+ | 2.52 | Dennis Ribant | 144 | NYN |
| +063+ | 2.48 | Dave Boswell | 157 | MIN |
| +074+ | 2.19 | Sonny Siebert | 198 | CLE |
| +078+ | 2.02 | George Brunet | 160.7 | ANA |
| +085+ | 1.86 | Sam McDowell | 131 | CLE |
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