| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 17.54 | 196607180_LAN_PHI |
| Joe Horlen | CHA | 4.26 | 196607160_CLE_CHA |
| Bob Veale | PIT | 3.27 | 196607180_SFN_PIT |
| Mike Cuellar | HOU | 1.67 | 196607181_HOU_NYN |
| Chris Short | PHI | 1.32 | 196607171_LAN_PHI |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Diego Segui | TEX | -2.53 | 196607160_TEX_MIN |
| Fred Talbot | NYA | -2.43 | 196607171_NYA_MIN |
| Art Mahaffey | SLN | -2.16 | 196607172_CHN_SLN |
| Ray Sadecki | SFN | -1.5 | 196607160_SFN_PHI |
| Hank Fischer | CIN | -1.1 | 196607170_CIN_ATL |
Based on accumulated WAA for this season up to 1966-07-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.78 | Sandy Koufax | 182.3 | LAN |
| +003+ | 6.16 | Juan Marichal | 181.3 | SFN |
| +009+ | 5.25 | Bob Gibson | 163.3 | SLN |
| +011+ | 5.02 | Claude Osteen | 156.7 | LAN |
| +013+ | 4.18 | Mike Cuellar | 115 | HOU |
| +015+ | 4.1 | Al Jackson | 127 | SLN |
| +019+ | 3.66 | Steve Barber | 122.7 | BAL |
| +020+ | 3.53 | Jim Bunning | 161.7 | PHI |
| +021+ | 3.45 | Joe Horlen | 119 | CHA |
| +023+ | 3.16 | George Brunet | 122 | ANA |
| +024+ | 3.12 | Jim Kaat | 153.7 | MIN |
| +030+ | 2.81 | Gary Peters | 116.3 | CHA |
| +031+ | 2.81 | Tommy John | 124 | CHA |
| +034+ | 2.73 | Jim Maloney | 128.7 | CIN |
| +037+ | 2.6 | Minnie Rojas | 47.7 | ANA |
| +038+ | 2.58 | Bob Veale | 158 | PIT |
| +043+ | 2.46 | Sonny Siebert | 135.3 | CLE |
| +052+ | 2.22 | Sam McDowell | 101.7 | CLE |
| +053+ | 2.2 | Gary Bell | 147.7 | CLE |
| +057+ | 2.16 | Woodie Fryman | 98.7 | PIT |
| +058+ | 2.15 | Dennis Ribant | 91.7 | NYN |
| +059+ | 2.11 | Ken Johnson | 125.7 | ATL |
| +063+ | 2.03 | Ray Washburn | 89.7 | SLN |
| +064+ | 2.02 | Gaylord Perry | 122 | SFN |
| +072+ | 1.84 | Bruce Howard | 66 | CHA |
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