| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Marichal | SFN | 11.11 | 196607250_PIT_SFN |
| Claude Osteen | LAN | 6.01 | 196607260_PHI_LAN |
| Joe Horlen | CHA | 4.65 | 196607260_DET_CHA |
| Jim Maloney | CIN | 4.19 | 196607241_ATL_CIN |
| Steve Barber | BAL | 2.3 | 196607260_CLE_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -3.63 | 196607242_ATL_CIN |
| Dick Ellsworth | CHN | -1.4 | 196607260_CHN_CIN |
| Tony Cloninger | ATL | -1.34 | 196607241_ATL_CIN |
| Bob Buhl | PHI | -1.09 | 196607240_PHI_SFN |
| Mickey Lolich | DET | -1.07 | 196607260_DET_CHA |
Based on accumulated WAA for this season up to 1966-07-26.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.38 | Sandy Koufax | 191.3 | LAN |
| +003+ | 7 | Juan Marichal | 198.3 | SFN |
| +006+ | 6.02 | Bob Gibson | 172.3 | SLN |
| +010+ | 5.19 | Claude Osteen | 170.7 | LAN |
| +015+ | 3.98 | Joe Horlen | 132 | CHA |
| +016+ | 3.94 | Jim Bunning | 174.7 | PHI |
| +018+ | 3.88 | Al Jackson | 141.7 | SLN |
| +019+ | 3.85 | Mike Cuellar | 120.3 | HOU |
| +023+ | 3.41 | Steve Barber | 123.7 | BAL |
| +026+ | 3.21 | Jim Kaat | 171.7 | MIN |
| +029+ | 2.99 | Jim Maloney | 145 | CIN |
| +031+ | 2.93 | Gary Peters | 124.3 | CHA |
| +035+ | 2.73 | Dennis Ribant | 108 | NYN |
| +039+ | 2.7 | Bob Veale | 158 | PIT |
| +042+ | 2.59 | Woodie Fryman | 110.7 | PIT |
| +050+ | 2.47 | Tommy John | 129 | CHA |
| +051+ | 2.46 | Gaylord Perry | 137 | SFN |
| +052+ | 2.4 | Sonny Siebert | 154.3 | CLE |
| +056+ | 2.26 | Bruce Howard | 80.7 | CHA |
| +057+ | 2.25 | George Brunet | 130 | ANA |
| +059+ | 2.17 | Ray Washburn | 98.7 | SLN |
| +062+ | 2.14 | Sam McDowell | 102.7 | CLE |
| +068+ | 1.97 | Mel Stottlemyre | 170 | NYA |
| +072+ | 1.87 | Ken Johnson | 137.3 | ATL |
| +077+ | 1.84 | Pete Richert | 166.7 | TEX |
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