| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 15.83 | 196607050_CIN_LAN |
| Juan Marichal | SFN | 10.26 | 196607041_SLN_SFN |
| Mel Stottlemyre | NYA | 4.38 | 196607041_CHA_NYA |
| Bob Veale | PIT | 4.19 | 196607031_PIT_NYN |
| Jim Maloney | CIN | 3.86 | 196607050_CIN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Fred Talbot | NYA | -2.13 | 196607050_BOS_NYA |
| Lee Stange | BOS | -1.9 | 196607042_TEX_BOS |
| Jim Hannan | TEX | -1.44 | 196607042_TEX_BOS |
| Hank Fischer | CIN | -1.26 | 196607030_CIN_HOU |
| Denny Lemaster | ATL | -1.24 | 196607050_ATL_HOU |
Based on accumulated WAA for this season up to 1966-07-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.58 | Sandy Koufax | 161.3 | LAN |
| +004+ | 5.57 | Bob Gibson | 159 | SLN |
| +007+ | 4.93 | Jim Bunning | 146.3 | PHI |
| +008+ | 4.79 | Juan Marichal | 163 | SFN |
| +009+ | 4.53 | Al Jackson | 113.3 | SLN |
| +014+ | 4.04 | Mike Cuellar | 99.3 | HOU |
| +015+ | 3.71 | Claude Osteen | 134.7 | LAN |
| +019+ | 3.19 | Joe Horlen | 100 | CHA |
| +020+ | 3.04 | Steve Barber | 103 | BAL |
| +023+ | 2.96 | Gaylord Perry | 105.7 | SFN |
| +024+ | 2.86 | Dennis Ribant | 83.7 | NYN |
| +026+ | 2.7 | Sam McDowell | 94 | CLE |
| +032+ | 2.51 | Jim Maloney | 115 | CIN |
| +039+ | 2.41 | Woodie Fryman | 85 | PIT |
| +041+ | 2.36 | Tommy John | 108 | CHA |
| +043+ | 2.32 | Bob Veale | 136.3 | PIT |
| +044+ | 2.31 | Jim Kaat | 135.3 | MIN |
| +048+ | 2.06 | Minnie Rojas | 41.7 | ANA |
| +050+ | 2.03 | Gary Peters | 98.7 | CHA |
| +053+ | 2.01 | Mel Stottlemyre | 139.7 | NYA |
| +058+ | 1.86 | Pete Richert | 142.3 | TEX |
| +061+ | 1.7 | Clay Carroll | 70 | ATL |
| +068+ | 1.55 | Ken Johnson | 112 | ATL |
| +069+ | 1.53 | Sonny Siebert | 121.3 | CLE |
| +075+ | 1.4 | George Brunet | 96.7 | ANA |
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