| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Bunning | PHI | 6.6 | 196605180_SLN_PHI |
| Sandy Koufax | LAN | 5.46 | 196605190_SFN_LAN |
| Mel Stottlemyre | NYA | 3.85 | 196605180_NYA_DET |
| Bob Gibson | SLN | 2.67 | 196605180_SLN_PHI |
| Dean Chance | ANA | 2.46 | 196605182_ANA_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Earl Wilson | BOS | -3.85 | 196605180_BOS_BAL |
| Jack Fisher | NYN | -2.31 | 196605200_NYN_SFN |
| Ernie Broglio | CHN | -2.26 | 196605181_HOU_CHN |
| Fred Talbot | OAK | -1.82 | 196605200_OAK_BOS |
| Bill Monbouquette | DET | -1.17 | 196605202_DET_BAL |
Based on accumulated WAA for this season up to 1966-05-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.73 | Juan Marichal | 69 | SFN |
| +005+ | 2.37 | Sam McDowell | 65.7 | CLE |
| +008+ | 2.18 | Sandy Koufax | 64.3 | LAN |
| +011+ | 1.94 | Chris Short | 65.7 | PHI |
| +012+ | 1.94 | Mel Stottlemyre | 63 | NYA |
| +013+ | 1.88 | Dick Ellsworth | 55.7 | CHN |
| +014+ | 1.87 | Mike Cuellar | 41.7 | HOU |
| +016+ | 1.81 | Jim Maloney | 34.7 | CIN |
| +017+ | 1.69 | Al Jackson | 25 | SLN |
| +018+ | 1.58 | Denny McLain | 56.7 | DET |
| +020+ | 1.47 | Denny Lemaster | 53 | ATL |
| +022+ | 1.42 | Tommy John | 51.7 | CHA |
| +025+ | 1.36 | Jim Bunning | 60.7 | PHI |
| +027+ | 1.33 | Pete Richert | 63 | TEX |
| +029+ | 1.3 | Jim O'Toole | 28 | CIN |
| +032+ | 1.26 | Bob Gibson | 66.3 | SLN |
| XXXXX | 1.24 | Clay Carroll | 27.7 | ATL |
| XXXXX | 1.23 | Barry Latman | 38.7 | HOU |
| XXXXX | 1.13 | Whitey Ford | 39 | NYA |
| XXXXX | 1.09 | Jim Grant | 52.3 | MIN |
| XXXXX | 1.07 | Claude Osteen | 66.3 | LAN |
| XXXXX | 0.95 | Camilo Pascual | 56 | MIN |
| XXXXX | 0.89 | Gary Peters | 53 | CHA |
| XXXXX | 0.89 | Rob Gardner | 37.7 | NYN |
| XXXXX | 0.89 | Rollie Sheldon | 38.7 | OAK |
_