| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Marichal | SFN | 11.4 | 196606080_SFN_HOU |
| Jim Bunning | PHI | 9.99 | 196606070_CIN_PHI |
| Mel Stottlemyre | NYA | 5.64 | 196606080_NYA_CLE |
| Bob Gibson | SLN | 5.38 | 196606070_SLN_PIT |
| Jim Kaat | MIN | 1.9 | 196606070_OAK_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Diego Segui | TEX | -2.31 | 196606090_TEX_BAL |
| Earl Wilson | BOS | -2.1 | 196606080_BOS_DET |
| Ray Sadecki | SFN | -1.76 | 196606070_SFN_HOU |
| Bob Buhl | PHI | -1.57 | 196606090_CIN_PHI |
| Fred Talbot | OAK | -1.23 | 196606080_OAK_MIN |
Based on accumulated WAA for this season up to 1966-06-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 4.59 | Sandy Koufax | 100.3 | LAN |
| +003+ | 4.27 | Jim Bunning | 106.7 | PHI |
| +004+ | 4.05 | Juan Marichal | 111 | SFN |
| +006+ | 3.41 | Mike Cuellar | 62.3 | HOU |
| +012+ | 2.86 | Bob Gibson | 109 | SLN |
| +013+ | 2.66 | Mel Stottlemyre | 100 | NYA |
| +014+ | 2.49 | Dick Ellsworth | 92 | CHN |
| +015+ | 2.45 | Al Jackson | 62 | SLN |
| +016+ | 2.38 | Claude Osteen | 93.7 | LAN |
| +017+ | 2.38 | Tommy John | 80.3 | CHA |
| +021+ | 2.17 | Jim Maloney | 66.7 | CIN |
| +029+ | 1.87 | Pete Richert | 99.7 | TEX |
| +033+ | 1.69 | Phil Ortega | 76.3 | TEX |
| +034+ | 1.68 | Jim Kaat | 85.7 | MIN |
| +038+ | 1.63 | Gary Peters | 62.3 | CHA |
| +039+ | 1.62 | John Buzhardt | 54 | CHA |
| +044+ | 1.55 | Chris Short | 101.3 | PHI |
| +051+ | 1.49 | Dennis Ribant | 45.3 | NYN |
| +052+ | 1.46 | Clay Carroll | 45.3 | ATL |
| +054+ | 1.38 | Gary Bell | 78.7 | CLE |
| +056+ | 1.35 | Luis Tiant | 56.3 | CLE |
| +059+ | 1.27 | Whitey Ford | 40 | NYA |
| XXXXX | 1.2 | Joe Horlen | 67.7 | CHA |
| XXXXX | 1.18 | Ralph Terry | 35.7 | OAK |
| XXXXX | 1.13 | Steve Barber | 65.7 | BAL |
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