| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 6.47 | 196605230_PIT_LAN |
| Chris Short | PHI | 6.02 | 196605250_PHI_LAN |
| Sam McDowell | CLE | 4.37 | 196605250_CLE_DET |
| Dean Chance | ANA | 2.43 | 196605250_ANA_NYA |
| Whitey Ford | NYA | 2.39 | 196605240_ANA_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Diego Segui | TEX | -3.27 | 196605250_OAK_TEX |
| Jerry Stephenson | BOS | -2.54 | 196605250_MIN_BOS |
| Bob Buhl | PHI | -2.43 | 196605240_PHI_LAN |
| Jack Fisher | NYN | -2.14 | 196605240_NYN_HOU |
| Fred Talbot | OAK | -1.82 | 196605250_OAK_TEX |
Based on accumulated WAA for this season up to 1966-05-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.4 | Juan Marichal | 78 | SFN |
| +005+ | 2.62 | Chris Short | 80.3 | PHI |
| +007+ | 2.39 | Sandy Koufax | 73.3 | LAN |
| +010+ | 2.28 | Jim Maloney | 43.7 | CIN |
| +011+ | 2.21 | Mike Cuellar | 46.3 | HOU |
| +014+ | 1.92 | Mel Stottlemyre | 71 | NYA |
| +015+ | 1.88 | Al Jackson | 33 | SLN |
| +017+ | 1.82 | Jim Bunning | 69.7 | PHI |
| +019+ | 1.75 | Bob Gibson | 75.3 | SLN |
| +021+ | 1.65 | Tommy John | 60.3 | CHA |
| +024+ | 1.58 | Sam McDowell | 68.3 | CLE |
| +026+ | 1.5 | Clay Carroll | 31 | ATL |
| +028+ | 1.43 | Pete Richert | 68 | TEX |
| +031+ | 1.36 | Jim O'Toole | 34.3 | CIN |
| +033+ | 1.33 | John O'Donoghue | 18.3 | CLE |
| +035+ | 1.27 | Luis Tiant | 43.7 | CLE |
| +036+ | 1.26 | Claude Osteen | 72.3 | LAN |
| XXXXX | 1.21 | Jim Grant | 59 | MIN |
| XXXXX | 1.2 | Whitey Ford | 40 | NYA |
| XXXXX | 1.15 | Dick Ellsworth | 59.7 | CHN |
| XXXXX | 1.01 | Sonny Siebert | 54.7 | CLE |
| XXXXX | 1 | Jose Santiago | 50 | BOS |
| XXXXX | 0.95 | Milt Pappas | 53.7 | CIN |
| XXXXX | 0.93 | Bill Hands | 45.7 | CHN |
| XXXXX | 0.91 | Barry Latman | 43 | HOU |
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