| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 20.08 | 196608050_LAN_HOU |
| Juan Marichal | SFN | 11.12 | 196608040_SFN_NYN |
| Jim Bunning | PHI | 6.95 | 196608040_HOU_PHI |
| Jim Maloney | CIN | 3.36 | 196608030_CIN_SLN |
| Gary Peters | CHA | 2.86 | 196608050_CHA_ANA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -3.75 | 196608040_CIN_SLN |
| Dick Ellsworth | CHN | -3 | 196608040_ATL_CHN |
| Fred Talbot | NYA | -1.76 | 196608051_NYA_CLE |
| Bob Buhl | PHI | -1.31 | 196608050_ATL_PHI |
| Phil Ortega | TEX | -1.15 | 196608040_TEX_OAK |
Based on accumulated WAA for this season up to 1966-08-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.79 | Sandy Koufax | 215.3 | LAN |
| +004+ | 7.17 | Juan Marichal | 207.7 | SFN |
| +008+ | 5.82 | Bob Gibson | 186.3 | SLN |
| +010+ | 5.44 | Jim Bunning | 203.3 | PHI |
| +014+ | 4.86 | Al Jackson | 159.7 | SLN |
| +017+ | 4.54 | Joe Horlen | 141 | CHA |
| +019+ | 4.46 | Claude Osteen | 176.7 | LAN |
| +020+ | 4.44 | Gary Peters | 142.3 | CHA |
| +021+ | 3.9 | Jim Maloney | 164.7 | CIN |
| +022+ | 3.86 | Mike Cuellar | 129.7 | HOU |
| +023+ | 3.47 | Steve Barber | 123.7 | BAL |
| +024+ | 3.46 | Bob Veale | 167 | PIT |
| +031+ | 3.24 | Tommy John | 138 | CHA |
| +033+ | 3.21 | Jim Kaat | 189 | MIN |
| +046+ | 2.78 | Gaylord Perry | 156 | SFN |
| +048+ | 2.73 | Bruce Howard | 96.3 | CHA |
| +049+ | 2.69 | George Brunet | 143 | ANA |
| +054+ | 2.4 | Gary Bell | 176.7 | CLE |
| +058+ | 2.34 | Dennis Ribant | 123.3 | NYN |
| +060+ | 2.28 | Mel Stottlemyre | 183 | NYA |
| +061+ | 2.27 | Sonny Siebert | 170 | CLE |
| +062+ | 2.18 | Dave Boswell | 152 | MIN |
| +066+ | 2.11 | Ken Johnson | 153.3 | ATL |
| +074+ | 1.87 | Jim O'Toole | 89 | CIN |
| +077+ | 1.74 | Dave McNally | 138.7 | BAL |
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