| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 12.35 | 196606140_HOU_LAN |
| Jim Bunning | PHI | 10.63 | 196606151_PHI_CIN |
| Bob Gibson | SLN | 5.56 | 196606150_PIT_SLN |
| Jim Maloney | CIN | 4.73 | 196606140_CIN_PIT |
| Joe Horlen | CHA | 3.23 | 196606132_ANA_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Diego Segui | TEX | -2.48 | 196606130_TEX_DET |
| Ernie Broglio | CHN | -2.4 | 196606130_CHN_SFN |
| Denny Lemaster | ATL | -2.37 | 196606150_NYN_ATL |
| Bill Monbouquette | DET | -1.97 | 196606140_TEX_DET |
| Camilo Pascual | MIN | -1.2 | 196606152_ANA_MIN |
Based on accumulated WAA for this season up to 1966-06-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.22 | Sandy Koufax | 117.3 | LAN |
| +003+ | 4.48 | Juan Marichal | 120 | SFN |
| +004+ | 4.48 | Bob Gibson | 127 | SLN |
| +005+ | 4.13 | Jim Bunning | 118.7 | PHI |
| +010+ | 3.45 | Mike Cuellar | 67.3 | HOU |
| +012+ | 2.83 | Tommy John | 87.3 | CHA |
| +016+ | 2.7 | Jim Maloney | 82.7 | CIN |
| +017+ | 2.44 | Mel Stottlemyre | 105.3 | NYA |
| +019+ | 2.36 | Phil Ortega | 93.3 | TEX |
| +021+ | 2.31 | Claude Osteen | 104.7 | LAN |
| +024+ | 2.26 | Sam McDowell | 75 | CLE |
| +025+ | 2.21 | Al Jackson | 68.3 | SLN |
| +027+ | 2.15 | Don Nottebart | 37 | CIN |
| +028+ | 2.12 | Dennis Ribant | 60.7 | NYN |
| +031+ | 2.05 | Dick Ellsworth | 97.7 | CHN |
| +041+ | 1.79 | Joe Horlen | 76.7 | CHA |
| +040+ | 1.79 | Chris Short | 110.3 | PHI |
| +039+ | 1.79 | Jim Kaat | 98.7 | MIN |
| +044+ | 1.71 | Steve Barber | 74.7 | BAL |
| +043+ | 1.71 | Pete Richert | 106 | TEX |
| +050+ | 1.56 | Gary Bell | 87.7 | CLE |
| +053+ | 1.52 | Ralph Terry | 42.3 | OAK |
| +055+ | 1.52 | Jack Lamabe | 49 | CHA |
| +057+ | 1.5 | Clay Carroll | 52.7 | ATL |
| +060+ | 1.38 | Hank Aguirre | 48.3 | DET |
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