| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 20.4 | 196608090_LAN_ATL |
| Jim Bunning | PHI | 7.54 | 196608090_PHI_SLN |
| Bob Gibson | SLN | 6.91 | 196608071_SLN_NYN |
| Joe Horlen | CHA | 4.93 | 196608070_CHA_ANA |
| Jim Maloney | CIN | 4.32 | 196608081_SFN_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -2.77 | 196608082_SFN_CIN |
| Ray Sadecki | SFN | -2.23 | 196608081_SFN_CIN |
| Dick Ellsworth | CHN | -2.16 | 196608090_HOU_CHN |
| Tony Cloninger | ATL | -2.03 | 196608070_ATL_PHI |
| Jim Lonborg | BOS | -1.86 | 196608071_BOS_DET |
Based on accumulated WAA for this season up to 1966-08-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.17 | Sandy Koufax | 223.7 | LAN |
| +003+ | 7.31 | Juan Marichal | 207.7 | SFN |
| +006+ | 6.39 | Bob Gibson | 194.7 | SLN |
| +011+ | 5.48 | Jim Bunning | 210.3 | PHI |
| +016+ | 4.83 | Al Jackson | 166 | SLN |
| +019+ | 4.47 | Gary Peters | 142.3 | CHA |
| +020+ | 4.42 | Claude Osteen | 177.7 | LAN |
| +021+ | 4.36 | Joe Horlen | 146 | CHA |
| +022+ | 4.02 | Tommy John | 147 | CHA |
| +024+ | 3.86 | Mike Cuellar | 136.7 | HOU |
| +028+ | 3.54 | Steve Barber | 123.7 | BAL |
| +032+ | 3.35 | Jim Maloney | 169.7 | CIN |
| +035+ | 3.07 | Bruce Howard | 102.7 | CHA |
| +045+ | 2.68 | Jim Kaat | 191.3 | MIN |
| +049+ | 2.6 | Bob Veale | 171 | PIT |
| +050+ | 2.55 | Dave McNally | 147.7 | BAL |
| +051+ | 2.53 | Gaylord Perry | 162 | SFN |
| +052+ | 2.52 | George Brunet | 148 | ANA |
| +053+ | 2.48 | Dave Boswell | 157 | MIN |
| +055+ | 2.47 | Dennis Ribant | 129.3 | NYN |
| +056+ | 2.44 | Gary Bell | 183.7 | CLE |
| +069+ | 2.08 | Jim Grant | 164.7 | MIN |
| +070+ | 2.07 | Sonny Siebert | 176.7 | CLE |
| +071+ | 2.06 | Pete Richert | 189.7 | TEX |
| +072+ | 2.04 | Woodie Fryman | 128.7 | PIT |
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