| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sam McDowell | CLE | 6.2 | 196605210_CLE_CHA |
| Chris Short | PHI | 6.03 | 196605210_PHI_HOU |
| Sandy Koufax | LAN | 5.46 | 196605190_SFN_LAN |
| Jim Maloney | CIN | 5.23 | 196605210_SLN_CIN |
| Dean Chance | ANA | 2.14 | 196605210_ANA_TEX |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Art Mahaffey | SLN | -3.6 | 196605210_SLN_CIN |
| Diego Segui | TEX | -3.32 | 196605210_ANA_TEX |
| Jerry Stephenson | BOS | -2.31 | 196605210_OAK_BOS |
| Jack Fisher | NYN | -2.31 | 196605200_NYN_SFN |
| Fred Talbot | OAK | -1.82 | 196605200_OAK_BOS |
Based on accumulated WAA for this season up to 1966-05-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.76 | Juan Marichal | 69 | SFN |
| +005+ | 2.31 | Jim Maloney | 43.7 | CIN |
| +006+ | 2.22 | Mike Cuellar | 46.3 | HOU |
| +009+ | 2.15 | Sandy Koufax | 64.3 | LAN |
| +012+ | 1.97 | Chris Short | 71.7 | PHI |
| +011+ | 1.97 | Mel Stottlemyre | 63 | NYA |
| +014+ | 1.89 | Dick Ellsworth | 55.7 | CHN |
| +018+ | 1.71 | Al Jackson | 25 | SLN |
| +022+ | 1.48 | Denny Lemaster | 53 | ATL |
| +024+ | 1.45 | Tommy John | 51.7 | CHA |
| +025+ | 1.37 | Sam McDowell | 65.7 | CLE |
| +026+ | 1.36 | Jim Bunning | 60.7 | PHI |
| +027+ | 1.35 | Pete Richert | 63 | TEX |
| +028+ | 1.32 | Clay Carroll | 28.7 | ATL |
| +031+ | 1.31 | Bob Gibson | 66.3 | SLN |
| +030+ | 1.31 | Jim O'Toole | 28 | CIN |
| XXXXX | 1.23 | Barry Latman | 38.7 | HOU |
| XXXXX | 1.2 | Denny McLain | 65 | DET |
| XXXXX | 1.15 | Whitey Ford | 39 | NYA |
| XXXXX | 1.12 | Jim Grant | 52.3 | MIN |
| XXXXX | 1.05 | Claude Osteen | 66.3 | LAN |
| XXXXX | 0.98 | Camilo Pascual | 56 | MIN |
| XXXXX | 0.97 | Dean Chance | 65.7 | ANA |
| XXXXX | 0.96 | Jim Kaat | 55.7 | MIN |
| XXXXX | 0.91 | Gary Peters | 53 | CHA |
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