| 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 |
|---|---|---|---|
| Sammy Ellis | CIN | -3.53 | 196608120_PIT_CIN |
| Bob Bruce | HOU | -2.54 | 196608142_HOU_SFN |
| Fred Talbot | NYA | -2.35 | 196608142_CLE_NYA |
| Dick Ellsworth | CHN | -2.28 | 196608130_CHN_LAN |
| Bill Monbouquette | DET | -1.33 | 196608120_DET_BOS |
Based on accumulated WAA for this season up to 1966-08-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.72 | Sandy Koufax | 232.7 | LAN |
| +005+ | 7.52 | Juan Marichal | 216.7 | SFN |
| +008+ | 6.17 | Bob Gibson | 203.7 | SLN |
| +010+ | 5.92 | Jim Bunning | 219 | PHI |
| +013+ | 5.59 | Gary Peters | 160 | CHA |
| +014+ | 5.45 | Al Jackson | 175 | SLN |
| +016+ | 4.84 | Tommy John | 156 | CHA |
| +018+ | 4.59 | Claude Osteen | 179.7 | LAN |
| +021+ | 4.4 | Mike Cuellar | 144.7 | HOU |
| +026+ | 3.84 | Jim Maloney | 174.7 | CIN |
| +028+ | 3.69 | Joe Horlen | 147.3 | CHA |
| +029+ | 3.6 | Steve Barber | 123.7 | BAL |
| +032+ | 3.4 | Bruce Howard | 108.7 | CHA |
| +035+ | 3.35 | Gaylord Perry | 171 | SFN |
| +046+ | 2.8 | Jim Kaat | 199.3 | MIN |
| +047+ | 2.79 | Gary Bell | 191.3 | CLE |
| +050+ | 2.71 | Jim Grant | 178.7 | MIN |
| +052+ | 2.69 | Dennis Ribant | 138.3 | NYN |
| +054+ | 2.56 | Steve Hargan | 118.3 | CLE |
| +056+ | 2.53 | Dave Boswell | 157 | MIN |
| +057+ | 2.53 | Dave McNally | 151.7 | BAL |
| +059+ | 2.48 | George Brunet | 154 | ANA |
| +064+ | 2.37 | Jim Nash | 68 | OAK |
| +066+ | 2.36 | Pete Richert | 197.7 | TEX |
| +075+ | 2.15 | Jim Perry | 113.3 | MIN |
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