| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Marichal | SFN | 8.82 | 196609210_PIT_SFN |
| Bob Gibson | SLN | 6.79 | 196609210_SLN_ATL |
| Jim Kaat | MIN | 3.15 | 196609210_MIN_CLE |
| Tommy John | CHA | 2.5 | 196609230_CHA_TEX |
| Claude Osteen | LAN | 1.67 | 196609210_PHI_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -6.65 | 196609210_CIN_CHN |
| Mickey Lolich | DET | -3.27 | 196609221_ANA_DET |
| Dick Ellsworth | CHN | -1.57 | 196609232_LAN_CHN |
| Fred Newman | ANA | -1 | 196609221_ANA_DET |
| Tommie Sisk | PIT | -0.46 | 196609210_PIT_SFN |
Based on accumulated WAA for this season up to 1966-09-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 12.29 | Sandy Koufax | 297 | LAN |
| +005+ | 8.9 | Juan Marichal | 290 | SFN |
| +006+ | 8.6 | Jim Bunning | 291 | PHI |
| +010+ | 7.54 | Bob Gibson | 266.3 | SLN |
| +011+ | 7.3 | Gary Peters | 205 | CHA |
| +014+ | 7.02 | Mike Cuellar | 211.7 | HOU |
| +015+ | 5.96 | Al Jackson | 224.3 | SLN |
| +026+ | 5.01 | Jim Kaat | 282.7 | MIN |
| +030+ | 4.81 | Joe Horlen | 195 | CHA |
| +035+ | 4.43 | Bruce Howard | 149.3 | CHA |
| +036+ | 4.32 | Steve Hargan | 178.3 | CLE |
| +037+ | 4.31 | Tommy John | 214.7 | CHA |
| +038+ | 4.08 | Sonny Siebert | 242 | CLE |
| +041+ | 3.88 | Claude Osteen | 230.7 | LAN |
| +043+ | 3.64 | Jim Nash | 109.7 | OAK |
| +044+ | 3.61 | Steve Barber | 132.3 | BAL |
| +046+ | 3.45 | Jim Maloney | 215.7 | CIN |
| +049+ | 3.32 | Jim Perry | 167.3 | MIN |
| +054+ | 2.96 | Bob Veale | 249.7 | PIT |
| +066+ | 2.68 | Earl Wilson | 251 | TOT |
| +068+ | 2.67 | Dave McNally | 206 | BAL |
| +069+ | 2.6 | Jim Grant | 241.3 | MIN |
| +071+ | 2.52 | Gaylord Perry | 232.3 | SFN |
| +072+ | 2.51 | Don Sutton | 221.7 | LAN |
| +076+ | 2.43 | Johnny Odom | 85 | OAK |
_