| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Marichal | SFN | 8.44 | 196608310_SFN_NYN |
| Bob Gibson | SLN | 8.21 | 196608310_ATL_SLN |
| Jim Bunning | PHI | 7.24 | 196609020_PHI_NYN |
| Gary Peters | CHA | 6.06 | 196608312_DET_CHA |
| Jim Maloney | CIN | 3.07 | 196609020_LAN_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Bruce | HOU | -2.32 | 196608310_HOU_PHI |
| Bill Hands | CHN | -1.78 | 196608310_CHN_CIN |
| Mickey Lolich | DET | -1.49 | 196609010_DET_CHA |
| Milt Pappas | CIN | -1.11 | 196609010_CHN_CIN |
| Hank Fischer | BOS | -0.98 | 196609020_BOS_OAK |
Based on accumulated WAA for this season up to 1966-09-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.63 | Sandy Koufax | 257 | LAN |
| +006+ | 8.08 | Jim Bunning | 261 | PHI |
| +007+ | 7.94 | Juan Marichal | 245.7 | SFN |
| +008+ | 7.46 | Gary Peters | 196 | CHA |
| +010+ | 6.98 | Bob Gibson | 232.3 | SLN |
| +014+ | 5.8 | Mike Cuellar | 176.7 | HOU |
| +021+ | 5.07 | Al Jackson | 199.3 | SLN |
| +022+ | 4.94 | Jim Kaat | 242.7 | MIN |
| +026+ | 4.55 | Tommy John | 188.7 | CHA |
| +028+ | 4.15 | Jim Maloney | 193.3 | CIN |
| +032+ | 3.96 | Claude Osteen | 207 | LAN |
| +033+ | 3.88 | Bruce Howard | 119 | CHA |
| +039+ | 3.57 | Dennis Ribant | 166.7 | NYN |
| +043+ | 3.39 | Jim Perry | 144.7 | MIN |
| +045+ | 3.26 | Steve Hargan | 143 | CLE |
| +048+ | 3.1 | Sonny Siebert | 222 | CLE |
| +049+ | 3.09 | Jim Grant | 213.3 | MIN |
| +051+ | 3 | Joe Horlen | 172.3 | CHA |
| +053+ | 2.97 | Gaylord Perry | 208 | SFN |
| +060+ | 2.73 | Sam McDowell | 154.3 | CLE |
| +066+ | 2.43 | Don Sutton | 211.3 | LAN |
| +067+ | 2.41 | Jim Nash | 88.7 | OAK |
| +068+ | 2.41 | Bob Veale | 213.7 | PIT |
| +074+ | 2.23 | George Brunet | 184 | ANA |
| +073+ | 2.23 | Gary Bell | 221.7 | CLE |
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