| 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 |
| Gary Peters | CHA | 2.86 | 196608050_CHA_ANA |
| Jim Kaat | MIN | 1.78 | 196608040_BOS_MIN |
| 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 1966-08-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.82 | Sandy Koufax | 215.3 | LAN |
| +004+ | 7.22 | Juan Marichal | 207.7 | SFN |
| +008+ | 5.84 | Bob Gibson | 186.3 | SLN |
| +010+ | 5.47 | Jim Bunning | 203.3 | PHI |
| +013+ | 4.88 | Al Jackson | 159.7 | SLN |
| +017+ | 4.56 | Joe Horlen | 141 | CHA |
| +018+ | 4.48 | Claude Osteen | 176.7 | LAN |
| +020+ | 4.46 | Gary Peters | 142.3 | CHA |
| +021+ | 4 | Tommy John | 147 | CHA |
| +022+ | 3.94 | Jim Maloney | 164.7 | CIN |
| +023+ | 3.83 | Mike Cuellar | 136.7 | HOU |
| +025+ | 3.49 | Steve Barber | 123.7 | BAL |
| +026+ | 3.48 | Bob Veale | 167 | PIT |
| +032+ | 3.23 | Jim Kaat | 189 | MIN |
| +045+ | 2.81 | Gaylord Perry | 156 | SFN |
| +047+ | 2.74 | Bruce Howard | 96.3 | CHA |
| +050+ | 2.49 | George Brunet | 148 | ANA |
| +051+ | 2.49 | Dave McNally | 147.7 | BAL |
| +055+ | 2.43 | Gary Bell | 176.7 | CLE |
| +060+ | 2.35 | Dennis Ribant | 123.3 | NYN |
| +063+ | 2.3 | Mel Stottlemyre | 183 | NYA |
| +064+ | 2.29 | Sonny Siebert | 170 | CLE |
| +068+ | 2.19 | Dave Boswell | 152 | MIN |
| +070+ | 2.15 | Ken Johnson | 153.3 | ATL |
| +071+ | 2.01 | Jim Grant | 164.7 | MIN |
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