| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Marichal | SFN | 9.94 | 196607150_SFN_PHI |
| Jim Bunning | PHI | 7.2 | 196607150_SFN_PHI |
| Claude Osteen | LAN | 5.64 | 196607172_LAN_PHI |
| Joe Horlen | CHA | 4.26 | 196607160_CLE_CHA |
| Jim Kaat | MIN | 2.62 | 196607150_TEX_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Diego Segui | TEX | -2.53 | 196607160_TEX_MIN |
| Fred Talbot | NYA | -2.43 | 196607171_NYA_MIN |
| Sammy Ellis | CIN | -2.37 | 196607150_SLN_CIN |
| Art Mahaffey | SLN | -2.16 | 196607172_CHN_SLN |
| Ray Sadecki | SFN | -1.5 | 196607160_SFN_PHI |
Based on accumulated WAA for this season up to 1966-07-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.96 | Sandy Koufax | 177.3 | LAN |
| +003+ | 6.13 | Juan Marichal | 181.3 | SFN |
| +009+ | 5.23 | Bob Gibson | 163.3 | SLN |
| +011+ | 4.99 | Claude Osteen | 156.7 | LAN |
| +013+ | 4.15 | Mike Cuellar | 107.3 | HOU |
| +015+ | 4.09 | Al Jackson | 127 | SLN |
| +019+ | 3.65 | Steve Barber | 122.7 | BAL |
| +020+ | 3.51 | Jim Bunning | 161.7 | PHI |
| +021+ | 3.43 | Joe Horlen | 119 | CHA |
| +023+ | 3.13 | George Brunet | 122 | ANA |
| +024+ | 3.11 | Jim Kaat | 153.7 | MIN |
| +030+ | 2.8 | Gary Peters | 116.3 | CHA |
| +031+ | 2.79 | Tommy John | 124 | CHA |
| +036+ | 2.7 | Jim Maloney | 128.7 | CIN |
| +037+ | 2.62 | Bob Veale | 151 | PIT |
| +038+ | 2.59 | Minnie Rojas | 47.7 | ANA |
| +042+ | 2.44 | Sonny Siebert | 135.3 | CLE |
| +052+ | 2.21 | Sam McDowell | 101.7 | CLE |
| +055+ | 2.14 | Woodie Fryman | 98.7 | PIT |
| +056+ | 2.14 | Dennis Ribant | 91.7 | NYN |
| +058+ | 2.09 | Ken Johnson | 125.7 | ATL |
| +062+ | 2.02 | Ray Washburn | 89.7 | SLN |
| +069+ | 1.84 | Gaylord Perry | 114.7 | SFN |
| +070+ | 1.83 | Bruce Howard | 66 | CHA |
| +075+ | 1.66 | Gary Bell | 138.7 | CLE |
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