| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 15.61 | 196609070_SFN_LAN |
| Juan Marichal | SFN | 9.57 | 196609090_CHN_SFN |
| Jim Bunning | PHI | 8.23 | 196609060_PHI_CHN |
| Gary Peters | CHA | 6.01 | 196609090_TEX_CHA |
| Jim Kaat | MIN | 3.32 | 196609090_BAL_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Bruce | HOU | -2.89 | 196609090_HOU_LAN |
| Ray Sadecki | SFN | -1.66 | 196609060_SFN_LAN |
| Fred Talbot | NYA | -1.57 | 196609090_NYA_BOS |
| Bob Shaw | NYN | -1.01 | 196609090_ATL_NYN |
| Hank Fischer | BOS | -0.73 | 196609060_BOS_CLE |
Based on accumulated WAA for this season up to 1966-09-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.65 | Sandy Koufax | 270 | LAN |
| +005+ | 8.97 | Juan Marichal | 263 | SFN |
| +007+ | 8.08 | Jim Bunning | 268 | PHI |
| +009+ | 7.51 | Bob Gibson | 241.3 | SLN |
| +010+ | 7.37 | Gary Peters | 205 | CHA |
| +014+ | 6.1 | Mike Cuellar | 186.7 | HOU |
| +016+ | 5.8 | Jim Kaat | 260.7 | MIN |
| +021+ | 5.26 | Al Jackson | 209.3 | SLN |
| +026+ | 4.79 | Tommy John | 196.7 | CHA |
| +028+ | 4.67 | Claude Osteen | 215.7 | LAN |
| +035+ | 4.05 | Jim Maloney | 199.3 | CIN |
| +036+ | 3.92 | Dennis Ribant | 175.7 | NYN |
| +040+ | 3.75 | Bruce Howard | 127.7 | CHA |
| +041+ | 3.71 | Jim Perry | 158.7 | MIN |
| +042+ | 3.61 | Sonny Siebert | 231 | CLE |
| +044+ | 3.55 | Joe Horlen | 179 | CHA |
| +047+ | 3.32 | Jim Grant | 221.3 | MIN |
| +050+ | 3.27 | Gaylord Perry | 214 | SFN |
| +057+ | 2.96 | Jim Nash | 97.7 | OAK |
| +062+ | 2.79 | Steve Hargan | 147.7 | CLE |
| +066+ | 2.61 | Earl Wilson | 241 | TOT |
| +068+ | 2.53 | Gary Bell | 230.7 | CLE |
| +070+ | 2.41 | Don Sutton | 213.7 | LAN |
| +072+ | 2.39 | Dave McNally | 189 | BAL |
| +075+ | 2.32 | Billy O'Dell | 99 | TOT |
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