| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Marichal | SFN | 13.55 | 196605310_SFN_CIN |
| Sandy Koufax | LAN | 8.71 | 196606010_LAN_SLN |
| Jim Bunning | PHI | 8.2 | 196605301_PHI_NYN |
| Mel Stottlemyre | NYA | 5.81 | 196605310_NYA_TEX |
| Jim Maloney | CIN | 5.4 | 196606010_HOU_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ernie Broglio | CHN | -3.07 | 196605310_CHN_PIT |
| Diego Segui | TEX | -3.03 | 196605302_NYA_TEX |
| Jack Lamabe | CHA | -2.38 | 196605302_BOS_CHA |
| Bob Buhl | PHI | -2.28 | 196605302_PHI_NYN |
| Earl Wilson | BOS | -2.05 | 196605301_BOS_CHA |
Based on accumulated WAA for this season up to 1966-06-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.36 | Juan Marichal | 101 | SFN |
| +003+ | 3.72 | Sandy Koufax | 91.3 | LAN |
| +006+ | 2.96 | Jim Bunning | 88.7 | PHI |
| +008+ | 2.87 | Al Jackson | 49 | SLN |
| +010+ | 2.65 | Bob Gibson | 93.3 | SLN |
| +012+ | 2.27 | Tommy John | 69.3 | CHA |
| +014+ | 2.23 | Mel Stottlemyre | 87 | NYA |
| +015+ | 2.2 | Mike Cuellar | 46.3 | HOU |
| +017+ | 2.02 | Pete Richert | 84.3 | TEX |
| +021+ | 1.97 | Jim Maloney | 59 | CIN |
| +022+ | 1.95 | Claude Osteen | 87.3 | LAN |
| +024+ | 1.93 | Dick Ellsworth | 75.7 | CHN |
| +030+ | 1.71 | Luis Tiant | 53 | CLE |
| +034+ | 1.53 | Dave Giusti | 62.7 | HOU |
| +041+ | 1.4 | Chris Short | 84.7 | PHI |
| +045+ | 1.31 | Jim Kaat | 71.3 | MIN |
| +046+ | 1.26 | Jim O'Toole | 41.3 | CIN |
| XXXXX | 1.2 | Clay Carroll | 35.7 | ATL |
| XXXXX | 1.19 | Steve Barber | 54.3 | BAL |
| XXXXX | 1.16 | Whitey Ford | 40 | NYA |
| XXXXX | 1.04 | Bob Veale | 84.3 | PIT |
| XXXXX | 1.03 | Phil Ortega | 60.3 | TEX |
| XXXXX | 1.01 | Gary Bell | 66.7 | CLE |
| XXXXX | 0.98 | Dennis Ribant | 35.3 | NYN |
| XXXXX | 0.97 | Rollie Sheldon | 56.7 | OAK |
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