| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 12.39 | 196606180_SFN_LAN |
| Jim Bunning | PHI | 9.23 | 196606191_PHI_SLN |
| Bob Gibson | SLN | 7 | 196606192_PHI_SLN |
| Jim Maloney | CIN | 5.53 | 196606180_NYN_CIN |
| Joe Horlen | CHA | 3.54 | 196606200_CHA_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -2.52 | 196606192_NYN_CIN |
| Wade Blasingame | ATL | -2.44 | 196606180_PIT_ATL |
| Ray Sadecki | SFN | -1.38 | 196606180_SFN_LAN |
| Lee Stange | BOS | -1.34 | 196606191_BAL_BOS |
| Bob Buhl | PHI | -1.17 | 196606180_PHI_SLN |
Based on accumulated WAA for this season up to 1966-06-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.6 | Sandy Koufax | 126.3 | LAN |
| +003+ | 5.29 | Juan Marichal | 129 | SFN |
| +005+ | 5.05 | Bob Gibson | 136 | SLN |
| +007+ | 4.61 | Jim Bunning | 125.7 | PHI |
| +009+ | 3.42 | Tommy John | 96.3 | CHA |
| +012+ | 2.84 | Mike Cuellar | 72 | HOU |
| +013+ | 2.79 | Mel Stottlemyre | 114.3 | NYA |
| +015+ | 2.76 | Claude Osteen | 112 | LAN |
| +017+ | 2.7 | Pete Richert | 123 | TEX |
| +021+ | 2.6 | Jim Maloney | 91.3 | CIN |
| +022+ | 2.55 | Al Jackson | 77.3 | SLN |
| +029+ | 2.34 | Dennis Ribant | 67.7 | NYN |
| +032+ | 2.23 | Joe Horlen | 84 | CHA |
| +033+ | 2.1 | Phil Ortega | 100.3 | TEX |
| +044+ | 1.7 | Steve Barber | 81.7 | BAL |
| +047+ | 1.64 | Juan Pizarro | 42 | CHA |
| +050+ | 1.61 | Jim Kaat | 106 | MIN |
| +051+ | 1.6 | Sam McDowell | 79 | CLE |
| +052+ | 1.59 | Bob Veale | 111.7 | PIT |
| +053+ | 1.57 | Gary Bell | 94.7 | CLE |
| +062+ | 1.43 | Dick Ellsworth | 102.3 | CHN |
| +064+ | 1.39 | Hank Aguirre | 53.3 | DET |
| +066+ | 1.37 | Whitey Ford | 40 | NYA |
| +067+ | 1.36 | Clay Carroll | 56 | ATL |
| +071+ | 1.29 | Gaylord Perry | 72.7 | SFN |
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