| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Marichal | SFN | 9.81 | 196605221_NYN_SFN |
| Sandy Koufax | LAN | 6.47 | 196605230_PIT_LAN |
| Jim Bunning | PHI | 6.33 | 196605220_PHI_HOU |
| Sam McDowell | CLE | 6.2 | 196605210_CLE_CHA |
| Jim Maloney | CIN | 5.23 | 196605210_SLN_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Art Mahaffey | SLN | -3.6 | 196605210_SLN_CIN |
| Diego Segui | TEX | -3.32 | 196605210_ANA_TEX |
| Earl Wilson | BOS | -3.16 | 196605220_OAK_BOS |
| Ernie Broglio | CHN | -2.22 | 196605222_CHN_ATL |
| Wade Blasingame | ATL | -2.02 | 196605221_CHN_ATL |
Based on accumulated WAA for this season up to 1966-05-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.36 | Juan Marichal | 78 | SFN |
| +005+ | 2.36 | Sandy Koufax | 73.3 | LAN |
| +006+ | 2.27 | Jim Maloney | 43.7 | CIN |
| +009+ | 2.18 | Mike Cuellar | 46.3 | HOU |
| +012+ | 1.92 | Chris Short | 71.7 | PHI |
| +013+ | 1.89 | Mel Stottlemyre | 71 | NYA |
| +017+ | 1.77 | Jim Bunning | 69.7 | PHI |
| +019+ | 1.72 | Bob Gibson | 75.3 | SLN |
| +020+ | 1.68 | Al Jackson | 25 | SLN |
| +024+ | 1.44 | Denny Lemaster | 53 | ATL |
| +026+ | 1.42 | Tommy John | 51.7 | CHA |
| +027+ | 1.4 | Pete Richert | 68 | TEX |
| +028+ | 1.4 | Sam McDowell | 66.7 | CLE |
| +030+ | 1.35 | Jim O'Toole | 34.3 | CIN |
| +029+ | 1.35 | Clay Carroll | 29.3 | ATL |
| +031+ | 1.31 | John O'Donoghue | 18.3 | CLE |
| XXXXX | 1.23 | Claude Osteen | 72.3 | LAN |
| XXXXX | 1.19 | Jim Grant | 59 | MIN |
| XXXXX | 1.14 | Denny McLain | 65 | DET |
| XXXXX | 1.11 | Dick Ellsworth | 59.7 | CHN |
| XXXXX | 1.11 | Whitey Ford | 39 | NYA |
| XXXXX | 0.96 | Camilo Pascual | 56 | MIN |
| XXXXX | 0.96 | Sonny Siebert | 54.7 | CLE |
| XXXXX | 0.94 | Dean Chance | 65.7 | ANA |
| XXXXX | 0.94 | Jim Kaat | 55.7 | MIN |
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