| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 13.13 | 196606220_LAN_HOU |
| Juan Marichal | SFN | 11.54 | 196606210_SFN_CHN |
| Bob Gibson | SLN | 7.69 | 196606230_SLN_HOU |
| Mel Stottlemyre | NYA | 5.77 | 196606211_BAL_NYA |
| Jim Maloney | CIN | 5.16 | 196606220_PIT_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ernie Broglio | CHN | -3.12 | 196606222_SFN_CHN |
| Diego Segui | TEX | -2.38 | 196606210_DET_TEX |
| Denny Lemaster | ATL | -2.35 | 196606210_PHI_ATL |
| Earl Wilson | DET | -2.3 | 196606230_DET_TEX |
| Fred Talbot | NYA | -2.02 | 196606220_BAL_NYA |
Based on accumulated WAA for this season up to 1966-06-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.99 | Sandy Koufax | 135.3 | LAN |
| +002+ | 5.83 | Bob Gibson | 145 | SLN |
| +006+ | 4.69 | Jim Bunning | 125.7 | PHI |
| +007+ | 4.61 | Juan Marichal | 138 | SFN |
| +012+ | 3.06 | Mike Cuellar | 74.3 | HOU |
| +014+ | 2.98 | Al Jackson | 87.3 | SLN |
| +019+ | 2.83 | Claude Osteen | 112 | LAN |
| +021+ | 2.75 | Pete Richert | 123 | TEX |
| +022+ | 2.74 | Jim Maloney | 100.3 | CIN |
| +025+ | 2.65 | Tommy John | 99 | CHA |
| +028+ | 2.46 | Steve Barber | 90.7 | BAL |
| +029+ | 2.37 | Gary Bell | 104 | CLE |
| +030+ | 2.36 | Dennis Ribant | 67.7 | NYN |
| +032+ | 2.29 | Joe Horlen | 84 | CHA |
| +035+ | 2.18 | Mel Stottlemyre | 119 | NYA |
| +055+ | 1.69 | Bob Veale | 111.7 | PIT |
| +056+ | 1.68 | Jim Kaat | 106 | MIN |
| +057+ | 1.67 | Juan Pizarro | 42 | CHA |
| +059+ | 1.64 | Sam McDowell | 79 | CLE |
| +060+ | 1.6 | Minnie Rojas | 28 | ANA |
| +065+ | 1.41 | Hank Aguirre | 53.3 | DET |
| +067+ | 1.39 | Gaylord Perry | 78.7 | SFN |
| +069+ | 1.38 | Whitey Ford | 40 | NYA |
| +073+ | 1.27 | Dave Wickersham | 59.3 | DET |
| XXXXX | 1.12 | Phil Ortega | 100.7 | TEX |
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