| Starter | Tm | Tier | Game |
|---|---|---|---|
| Claude Osteen | LAN | 4.17 | 196608150_CIN_LAN |
| Gary Peters | CHA | 4.03 | 196608141_ANA_CHA |
| Al Jackson | SLN | 2.94 | 196608160_SLN_SFN |
| Mike Cuellar | HOU | 2.06 | 196608160_ATL_HOU |
| Jim Kaat | MIN | 1.47 | 196608150_ANA_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Bruce | HOU | -2.54 | 196608142_HOU_SFN |
| Jim Lonborg | BOS | -2.5 | 196608150_BAL_BOS |
| Fred Talbot | NYA | -2.35 | 196608142_CLE_NYA |
| Bob Shaw | NYN | -1.14 | 196608142_NYN_SLN |
| Tony Cloninger | ATL | -1.09 | 196608150_ATL_HOU |
Based on accumulated WAA for this season up to 1966-08-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.7 | Sandy Koufax | 232.7 | LAN |
| +006+ | 7.51 | Juan Marichal | 216.7 | SFN |
| +008+ | 6.18 | Bob Gibson | 203.7 | SLN |
| +011+ | 5.91 | Jim Bunning | 219 | PHI |
| +012+ | 5.7 | Al Jackson | 183 | SLN |
| +014+ | 5.57 | Gary Peters | 160 | CHA |
| +015+ | 5.19 | Tommy John | 163 | CHA |
| +019+ | 4.72 | Claude Osteen | 186.3 | LAN |
| +022+ | 4.4 | Mike Cuellar | 149.7 | HOU |
| +026+ | 3.87 | Gaylord Perry | 180 | SFN |
| +027+ | 3.86 | Jim Maloney | 174.7 | CIN |
| +029+ | 3.63 | Joe Horlen | 154.3 | CHA |
| +032+ | 3.58 | Steve Barber | 123.7 | BAL |
| +033+ | 3.39 | Bruce Howard | 108.7 | CHA |
| +044+ | 2.92 | Jim Kaat | 208.3 | MIN |
| +045+ | 2.91 | Jim Perry | 122.3 | MIN |
| +052+ | 2.71 | Dennis Ribant | 138.3 | NYN |
| +053+ | 2.69 | Jim Grant | 178.7 | MIN |
| +054+ | 2.68 | Gary Bell | 198.3 | CLE |
| +057+ | 2.57 | Dave McNally | 157.7 | BAL |
| +061+ | 2.52 | Steve Hargan | 118.3 | CLE |
| +060+ | 2.52 | Dave Boswell | 157 | MIN |
| +066+ | 2.37 | Jim Nash | 68 | OAK |
| +069+ | 2.31 | Pete Richert | 197.7 | TEX |
| +080+ | 2 | George Brunet | 160.7 | ANA |
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