| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 20.47 | 196608130_CHN_LAN |
| Juan Marichal | SFN | 10.32 | 196608130_HOU_SFN |
| Bob Gibson | SLN | 7.43 | 196608130_NYN_SLN |
| Jim Bunning | PHI | 7.05 | 196608131_PHI_ATL |
| Joe Horlen | CHA | 4.24 | 196608130_ANA_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Bruce | HOU | -2.54 | 196608142_HOU_SFN |
| Jim Lonborg | BOS | -2.5 | 196608150_BAL_BOS |
| Fred Talbot | NYA | -2.35 | 196608142_CLE_NYA |
| Dick Ellsworth | CHN | -2.28 | 196608130_CHN_LAN |
| Ray Culp | PHI | -1.33 | 196608132_PHI_ATL |
Based on accumulated WAA for this season up to 1966-08-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.73 | Sandy Koufax | 232.7 | LAN |
| +005+ | 7.54 | Juan Marichal | 216.7 | SFN |
| +008+ | 6.19 | Bob Gibson | 203.7 | SLN |
| +010+ | 5.93 | Jim Bunning | 219 | PHI |
| +013+ | 5.59 | Gary Peters | 160 | CHA |
| +014+ | 5.46 | Al Jackson | 175 | SLN |
| +017+ | 4.84 | Tommy John | 156 | CHA |
| +019+ | 4.74 | Claude Osteen | 186.3 | LAN |
| +023+ | 4.41 | Mike Cuellar | 144.7 | HOU |
| +026+ | 3.86 | Jim Maloney | 174.7 | CIN |
| +029+ | 3.65 | Joe Horlen | 154.3 | CHA |
| +030+ | 3.59 | Steve Barber | 123.7 | BAL |
| +032+ | 3.4 | Bruce Howard | 108.7 | CHA |
| +034+ | 3.36 | Gaylord Perry | 171 | SFN |
| +044+ | 2.95 | Jim Kaat | 208.3 | MIN |
| +050+ | 2.81 | Gary Bell | 191.3 | CLE |
| +052+ | 2.72 | Jim Grant | 178.7 | MIN |
| +053+ | 2.7 | Dennis Ribant | 138.3 | NYN |
| +055+ | 2.58 | Dave McNally | 157.7 | BAL |
| +056+ | 2.57 | Steve Hargan | 118.3 | CLE |
| +058+ | 2.54 | Dave Boswell | 157 | MIN |
| +064+ | 2.39 | Pete Richert | 197.7 | TEX |
| +066+ | 2.38 | Jim Nash | 68 | OAK |
| +075+ | 2.16 | Jim Perry | 113.3 | MIN |
| +079+ | 2.01 | George Brunet | 160.7 | ANA |
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