| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -1.7 | 196606280_LAN_CIN |
| Jim Lonborg | BOS | -1.68 | 196606300_NYA_BOS |
| Earl Wilson | DET | -1.54 | 196606280_DET_ANA |
| Camilo Pascual | MIN | -1.37 | 196606280_CLE_MIN |
| Tony Cloninger | ATL | -0.7 | 196606290_CHN_ATL |
Based on accumulated WAA for this season up to 1966-06-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.54 | Sandy Koufax | 144.3 | LAN |
| +002+ | 5.96 | Bob Gibson | 152 | SLN |
| +004+ | 5.41 | Jim Bunning | 142.7 | PHI |
| +005+ | 5.34 | Juan Marichal | 155 | SFN |
| +012+ | 3.58 | Mike Cuellar | 83.3 | HOU |
| +013+ | 3.53 | Claude Osteen | 128 | LAN |
| +019+ | 2.99 | Al Jackson | 95.3 | SLN |
| +021+ | 2.75 | Steve Barber | 97.3 | BAL |
| +023+ | 2.67 | Dennis Ribant | 76.7 | NYN |
| +024+ | 2.61 | Gaylord Perry | 96.7 | SFN |
| +030+ | 2.49 | Bob Veale | 129.7 | PIT |
| +031+ | 2.47 | Jim Kaat | 121 | MIN |
| +032+ | 2.45 | Joe Horlen | 91 | CHA |
| +033+ | 2.45 | Mel Stottlemyre | 132.7 | NYA |
| +035+ | 2.38 | Pete Richert | 136.3 | TEX |
| +036+ | 2.35 | Gary Bell | 119.3 | CLE |
| +042+ | 2.18 | Tommy John | 100.7 | CHA |
| +049+ | 1.93 | Sam McDowell | 85 | CLE |
| +055+ | 1.79 | Jim Maloney | 102 | CIN |
| +060+ | 1.67 | Denny McLain | 126 | DET |
| +061+ | 1.66 | Minnie Rojas | 37 | ANA |
| +063+ | 1.64 | Clay Carroll | 67 | ATL |
| +075+ | 1.33 | Whitey Ford | 42 | NYA |
| +079+ | 1.3 | Gary Peters | 89.7 | CHA |
| +082+ | 1.27 | Juan Pizarro | 50 | CHA |
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