| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 7.92 | 196605050_LAN_SFN |
| Sam McDowell | CLE | 7.8 | 196605060_CLE_BAL |
| Juan Marichal | SFN | 7.62 | 196605070_SFN_SLN |
| Jim Bunning | PHI | 6.06 | 196605070_PIT_PHI |
| Bob Veale | PIT | 3.67 | 196605050_PIT_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ernie Broglio | CHN | -2.99 | 196605070_CHN_NYN |
| Denny Lemaster | ATL | -2.75 | 196605060_ATL_HOU |
| Bob Buhl | PHI | -2.75 | 196605060_PIT_PHI |
| Dick Stigman | BOS | -2.14 | 196605060_BOS_MIN |
| Art Mahaffey | SLN | -2.01 | 196605070_SFN_SLN |
Based on accumulated WAA for this season up to 1966-05-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 2.76 | Juan Marichal | 50 | SFN |
| +002+ | 2.07 | Sam McDowell | 52.7 | CLE |
| +005+ | 1.94 | Luis Tiant | 27.3 | CLE |
| +008+ | 1.75 | Mike Cuellar | 28.7 | HOU |
| +009+ | 1.69 | Mel Stottlemyre | 38 | NYA |
| +010+ | 1.56 | Chris Short | 45.7 | PHI |
| +012+ | 1.47 | Claude Osteen | 48.7 | LAN |
| +020+ | 1.29 | Tommy John | 35.3 | CHA |
| +018+ | 1.29 | Jim Bunning | 47.7 | PHI |
| +021+ | 1.28 | Jim Grant | 32.3 | MIN |
| +022+ | 1.28 | Gary Peters | 29.3 | CHA |
| +023+ | 1.25 | Denny McLain | 40.7 | DET |
| XXXXX | 1.1 | Sonny Siebert | 27.3 | CLE |
| XXXXX | 1.06 | Jim Maloney | 18.7 | CIN |
| XXXXX | 1.01 | Clay Carroll | 24.7 | ATL |
| XXXXX | 1 | Ken Johnson | 33 | ATL |
| XXXXX | 0.98 | Whitey Ford | 37 | NYA |
| XXXXX | 0.94 | Rollie Sheldon | 27.3 | OAK |
| XXXXX | 0.91 | Bob Gibson | 42 | SLN |
| XXXXX | 0.83 | Rob Gardner | 24.3 | NYN |
| XXXXX | 0.82 | Joe Gibbon | 16.3 | SFN |
| XXXXX | 0.81 | Steve Barber | 31.7 | BAL |
| XXXXX | 0.8 | Barry Latman | 30 | HOU |
| XXXXX | 0.78 | Denny Lemaster | 30 | ATL |
| XXXXX | 0.78 | Gaylord Perry | 32.3 | SFN |
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