| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 17.44 | 196607270_PHI_LAN |
| Bob Gibson | SLN | 8 | 196607280_SLN_ATL |
| Jim Bunning | PHI | 5.59 | 196607270_PHI_LAN |
| Joe Horlen | CHA | 4.65 | 196607260_DET_CHA |
| Jim Kaat | MIN | 2.51 | 196607270_MIN_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Fred Talbot | NYA | -1.91 | 196607270_MIN_NYA |
| Dick Ellsworth | CHN | -1.4 | 196607260_CHN_CIN |
| Mickey Lolich | DET | -1.07 | 196607260_DET_CHA |
| Tommie Sisk | PIT | -0.85 | 196607270_PIT_SFN |
| Denny Lemaster | ATL | -0.69 | 196607260_SLN_ATL |
Based on accumulated WAA for this season up to 1966-07-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.07 | Sandy Koufax | 202.3 | LAN |
| +003+ | 7.04 | Juan Marichal | 198.3 | SFN |
| +006+ | 6.01 | Bob Gibson | 179.3 | SLN |
| +010+ | 5.17 | Claude Osteen | 170.7 | LAN |
| +014+ | 4.64 | Jim Bunning | 185.7 | PHI |
| +016+ | 4.01 | Joe Horlen | 132 | CHA |
| +017+ | 3.9 | Al Jackson | 141.7 | SLN |
| +018+ | 3.87 | Mike Cuellar | 120.3 | HOU |
| +022+ | 3.44 | Steve Barber | 123.7 | BAL |
| +029+ | 3.02 | Jim Maloney | 145 | CIN |
| +031+ | 2.95 | Gary Peters | 124.3 | CHA |
| +035+ | 2.76 | Dennis Ribant | 108 | NYN |
| +036+ | 2.74 | Bob Veale | 158 | PIT |
| +045+ | 2.61 | Woodie Fryman | 110.7 | PIT |
| +048+ | 2.5 | Jim Kaat | 172.7 | MIN |
| +049+ | 2.5 | Tommy John | 129 | CHA |
| +051+ | 2.49 | Gaylord Perry | 137 | SFN |
| +052+ | 2.45 | Sonny Siebert | 154.3 | CLE |
| +056+ | 2.29 | George Brunet | 130 | ANA |
| +057+ | 2.27 | Bruce Howard | 80.7 | CHA |
| +061+ | 2.17 | Sam McDowell | 102.7 | CLE |
| +063+ | 2.12 | Dave McNally | 133.3 | BAL |
| +069+ | 2 | Mel Stottlemyre | 170 | NYA |
| +074+ | 1.9 | Ken Johnson | 137.3 | ATL |
| +075+ | 1.88 | Jim O'Toole | 83.3 | CIN |
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