| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Bunning | PHI | 10.66 | 196607020_CHN_PHI |
| Juan Marichal | SFN | 10.26 | 196607041_SLN_SFN |
| Bob Gibson | SLN | 9.1 | 196607020_SLN_LAN |
| Mel Stottlemyre | NYA | 4.38 | 196607041_CHA_NYA |
| Bob Veale | PIT | 4.19 | 196607031_PIT_NYN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Lee Stange | BOS | -1.9 | 196607042_TEX_BOS |
| Jim Hannan | TEX | -1.44 | 196607042_TEX_BOS |
| Earl Wilson | DET | -1.36 | 196607020_OAK_DET |
| Hank Fischer | CIN | -1.26 | 196607030_CIN_HOU |
| Tommie Sisk | PIT | -0.98 | 196607042_PIT_CHN |
Based on accumulated WAA for this season up to 1966-07-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.87 | Sandy Koufax | 152.3 | LAN |
| +004+ | 5.6 | Bob Gibson | 159 | SLN |
| +007+ | 4.96 | Jim Bunning | 146.3 | PHI |
| +008+ | 4.82 | Juan Marichal | 163 | SFN |
| +009+ | 4.28 | Mike Cuellar | 94.3 | HOU |
| +014+ | 3.81 | Al Jackson | 104.3 | SLN |
| +015+ | 3.73 | Claude Osteen | 134.7 | LAN |
| +018+ | 3.21 | Joe Horlen | 100 | CHA |
| +019+ | 3.06 | Steve Barber | 103 | BAL |
| +022+ | 2.97 | Gaylord Perry | 105.7 | SFN |
| +023+ | 2.87 | Dennis Ribant | 83.7 | NYN |
| +027+ | 2.71 | Sam McDowell | 94 | CLE |
| +038+ | 2.38 | Tommy John | 108 | CHA |
| +040+ | 2.35 | Bob Veale | 136.3 | PIT |
| +041+ | 2.34 | Jim Kaat | 135.3 | MIN |
| +045+ | 2.23 | Jim Maloney | 109 | CIN |
| +047+ | 2.05 | Gary Peters | 98.7 | CHA |
| +049+ | 2.04 | Mel Stottlemyre | 139.7 | NYA |
| +048+ | 2.04 | Minnie Rojas | 41.3 | ANA |
| +055+ | 1.89 | Pete Richert | 142.3 | TEX |
| +060+ | 1.72 | Clay Carroll | 70 | ATL |
| +061+ | 1.7 | Woodie Fryman | 76 | PIT |
| +066+ | 1.57 | Ken Johnson | 112 | ATL |
| +068+ | 1.55 | Sonny Siebert | 121.3 | CLE |
| +074+ | 1.42 | George Brunet | 96.7 | ANA |
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