| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Bunning | PHI | 9.35 | 196607060_NYN_PHI |
| Bob Gibson | SLN | 8.37 | 196607080_HOU_SLN |
| Juan Marichal | SFN | 8.11 | 196607080_CIN_SFN |
| Joe Horlen | CHA | 4.79 | 196607062_CHA_TEX |
| Claude Osteen | LAN | 4.24 | 196607060_CIN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Lonborg | BOS | -2.75 | 196607081_CHA_BOS |
| Ray Sadecki | SFN | -2.33 | 196607070_CIN_SFN |
| Earl Wilson | DET | -1.47 | 196607060_ANA_DET |
| Sammy Ellis | CIN | -1.37 | 196607070_CIN_SFN |
| Jim Hannan | TEX | -1.1 | 196607082_TEX_NYA |
Based on accumulated WAA for this season up to 1966-07-08.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.63 | Sandy Koufax | 161.3 | LAN |
| +004+ | 5.59 | Juan Marichal | 172 | SFN |
| +009+ | 5.18 | Bob Gibson | 163.3 | SLN |
| +010+ | 5.01 | Jim Bunning | 151.7 | PHI |
| +011+ | 4.59 | Al Jackson | 113.3 | SLN |
| +012+ | 4.5 | Claude Osteen | 143.7 | LAN |
| +014+ | 4.09 | Mike Cuellar | 99.3 | HOU |
| +017+ | 3.79 | Steve Barber | 112 | BAL |
| +020+ | 3.43 | Joe Horlen | 107 | CHA |
| +022+ | 3.01 | Gaylord Perry | 105.7 | SFN |
| +023+ | 2.91 | Jim Kaat | 144.3 | MIN |
| +024+ | 2.9 | Sam McDowell | 101 | CLE |
| +029+ | 2.62 | Dennis Ribant | 87.7 | NYN |
| +030+ | 2.6 | Jim Maloney | 115 | CIN |
| +037+ | 2.46 | Woodie Fryman | 85 | PIT |
| +039+ | 2.44 | Bob Veale | 142 | PIT |
| +044+ | 2.2 | George Brunet | 106 | ANA |
| +046+ | 2.19 | Tommy John | 115 | CHA |
| +049+ | 2.18 | Gary Peters | 99.3 | CHA |
| +052+ | 2.08 | Minnie Rojas | 41.7 | ANA |
| +063+ | 1.82 | Sonny Siebert | 129.3 | CLE |
| +069+ | 1.62 | Ken Johnson | 112 | ATL |
| +075+ | 1.48 | Don Schwall | 49.3 | TOT |
| +076+ | 1.47 | Bobby Bolin | 110 | SFN |
| +078+ | 1.43 | Ray Washburn | 75.3 | SLN |
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