| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 19.04 | 196608210_SLN_LAN |
| Jim Bunning | PHI | 7.1 | 196608212_NYN_PHI |
| Tommy John | CHA | 3.49 | 196608200_CHA_CLE |
| Al Jackson | SLN | 3.45 | 196608200_SLN_LAN |
| Mike Cuellar | HOU | 2.08 | 196608200_CIN_HOU |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dick Ellsworth | CHN | -3.05 | 196608190_PIT_CHN |
| Fred Talbot | NYA | -2.52 | 196608191_OAK_NYA |
| Jim Lonborg | BOS | -2.01 | 196608210_MIN_BOS |
| Phil Ortega | TEX | -1.25 | 196608210_ANA_TEX |
| Bob Shaw | NYN | -1 | 196608200_NYN_PHI |
Based on accumulated WAA for this season up to 1966-08-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.89 | Sandy Koufax | 246 | LAN |
| +006+ | 7.05 | Juan Marichal | 218.7 | SFN |
| +009+ | 6.31 | Bob Gibson | 210.7 | SLN |
| +010+ | 6.24 | Jim Bunning | 234 | PHI |
| +011+ | 6.13 | Al Jackson | 191 | SLN |
| +014+ | 5.74 | Gary Peters | 167 | CHA |
| +015+ | 5.73 | Tommy John | 172 | CHA |
| +021+ | 4.72 | Mike Cuellar | 158.7 | HOU |
| +024+ | 4.4 | Gaylord Perry | 189 | SFN |
| +025+ | 4.33 | Claude Osteen | 192.7 | LAN |
| +029+ | 4.03 | Jim Maloney | 181.3 | CIN |
| +031+ | 3.85 | Joe Horlen | 162 | CHA |
| +035+ | 3.41 | Steve Barber | 124 | BAL |
| +036+ | 3.39 | Bruce Howard | 108.7 | CHA |
| +038+ | 3.3 | Jim Kaat | 215.7 | MIN |
| +039+ | 3.25 | Jim Grant | 188 | MIN |
| +044+ | 3.18 | Jim Perry | 130.7 | MIN |
| +051+ | 2.77 | Steve Hargan | 131.7 | CLE |
| +057+ | 2.62 | Dave McNally | 165.7 | BAL |
| +062+ | 2.51 | Dennis Ribant | 144 | NYN |
| +067+ | 2.34 | Gary Bell | 204.7 | CLE |
| +074+ | 2.21 | Sonny Siebert | 198 | CLE |
| +078+ | 2.1 | Dave Boswell | 162.3 | MIN |
| +084+ | 1.94 | George Brunet | 167 | ANA |
| +086+ | 1.88 | Sam McDowell | 131 | CLE |
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