| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 17.49 | 196607140_LAN_NYN |
| Jim Bunning | PHI | 9.06 | 196607100_PHI_CHN |
| Joe Horlen | CHA | 4.62 | 196607101_CHA_BOS |
| Sam McDowell | CLE | 4.19 | 196607101_CLE_OAK |
| Jim Maloney | CIN | 3.97 | 196607090_CIN_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Diego Segui | TEX | -3.46 | 196607090_TEX_NYA |
| Fred Talbot | NYA | -2.82 | 196607090_TEX_NYA |
| Tony Cloninger | ATL | -1.4 | 196607140_HOU_ATL |
| Earl Wilson | DET | -1.1 | 196607140_BAL_DET |
| Dave Morehead | BOS | -0.98 | 196607102_CHA_BOS |
Based on accumulated WAA for this season up to 1966-07-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 7.96 | Sandy Koufax | 177.3 | LAN |
| +006+ | 5.63 | Juan Marichal | 172 | SFN |
| +009+ | 5.24 | Bob Gibson | 163.3 | SLN |
| +011+ | 4.62 | Claude Osteen | 149.7 | LAN |
| +012+ | 4.41 | Al Jackson | 120.7 | SLN |
| +013+ | 4.17 | Mike Cuellar | 107.3 | HOU |
| +015+ | 4.09 | Jim Bunning | 155 | PHI |
| +019+ | 3.65 | Steve Barber | 122.7 | BAL |
| +021+ | 3.35 | Joe Horlen | 113 | CHA |
| +023+ | 2.97 | George Brunet | 115 | ANA |
| +024+ | 2.95 | Jim Kaat | 144.3 | MIN |
| +028+ | 2.78 | Tommy John | 124 | CHA |
| +030+ | 2.68 | Jim Maloney | 128.7 | CIN |
| +032+ | 2.66 | Dennis Ribant | 87.7 | NYN |
| +035+ | 2.6 | Bob Veale | 151 | PIT |
| +036+ | 2.59 | Woodie Fryman | 94 | PIT |
| +041+ | 2.42 | Minnie Rojas | 45.7 | ANA |
| +051+ | 2.26 | Gary Peters | 107.3 | CHA |
| +054+ | 2.18 | Sam McDowell | 101.7 | CLE |
| +061+ | 2.01 | Ray Washburn | 84.3 | SLN |
| +064+ | 1.91 | Sonny Siebert | 129.3 | CLE |
| +066+ | 1.87 | Ken Johnson | 119.7 | ATL |
| +067+ | 1.86 | Gaylord Perry | 114.7 | SFN |
| +073+ | 1.62 | Gary Bell | 138.7 | CLE |
| +075+ | 1.6 | Denny McLain | 148.7 | DET |
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