| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 20.11 | 196608300_LAN_NYN |
| Juan Marichal | SFN | 8.44 | 196608310_SFN_NYN |
| Bob Gibson | SLN | 8.21 | 196608310_ATL_SLN |
| Gary Peters | CHA | 6.06 | 196608312_DET_CHA |
| Jim Kaat | MIN | 2.75 | 196608310_BOS_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -5.47 | 196608300_SLN_CIN |
| Bob Bruce | HOU | -2.32 | 196608310_HOU_PHI |
| Bill Hands | CHN | -1.78 | 196608310_CHN_CIN |
| Mickey Lolich | DET | -1.49 | 196609010_DET_CHA |
| Joey Jay | ATL | -1.22 | 196608300_CHN_ATL |
Based on accumulated WAA for this season up to 1966-09-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.6 | Sandy Koufax | 257 | LAN |
| +006+ | 7.95 | Juan Marichal | 245.7 | SFN |
| +007+ | 7.46 | Gary Peters | 196 | CHA |
| +008+ | 7.29 | Jim Bunning | 252 | PHI |
| +009+ | 6.99 | Bob Gibson | 232.3 | SLN |
| +013+ | 5.76 | Mike Cuellar | 176.7 | HOU |
| +016+ | 5.53 | Tommy John | 182.7 | CHA |
| +022+ | 5.08 | Al Jackson | 199.3 | SLN |
| +023+ | 4.91 | Jim Kaat | 242.7 | MIN |
| +028+ | 4.47 | Jim Maloney | 187.3 | CIN |
| +032+ | 3.88 | Bruce Howard | 119 | CHA |
| +038+ | 3.64 | Claude Osteen | 201 | LAN |
| +039+ | 3.55 | Dennis Ribant | 166.7 | NYN |
| +040+ | 3.37 | Jim Perry | 144.7 | MIN |
| +045+ | 3.25 | Steve Hargan | 143 | CLE |
| +048+ | 3.18 | Jim Grant | 204.7 | MIN |
| +049+ | 3.08 | Sonny Siebert | 222 | CLE |
| +051+ | 3 | Joe Horlen | 172.3 | CHA |
| +052+ | 2.97 | Gaylord Perry | 208 | SFN |
| +060+ | 2.72 | Sam McDowell | 154.3 | CLE |
| +066+ | 2.5 | Dave McNally | 178.3 | BAL |
| +071+ | 2.4 | Jim Nash | 88.7 | OAK |
| +070+ | 2.4 | Don Sutton | 211.3 | LAN |
| +074+ | 2.26 | Gary Bell | 214.7 | CLE |
| +075+ | 2.26 | Bob Veale | 207 | PIT |
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