| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Marichal | SFN | 9.55 | 196609170_NYN_SFN |
| Jim Bunning | PHI | 9.53 | 196609190_PHI_LAN |
| Jim Kaat | MIN | 2.83 | 196609170_MIN_NYA |
| Claude Osteen | LAN | 2.49 | 196609180_PHI_LAN |
| Bruce Howard | CHA | 2.08 | 196609180_CHA_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sammy Ellis | CIN | -5.61 | 196609180_CIN_ATL |
| Bob Bruce | HOU | -3.63 | 196609181_NYN_HOU |
| Mickey Lolich | DET | -2.85 | 196609170_CLE_DET |
| Bob Shaw | NYN | -1.81 | 196609190_NYN_HOU |
| Dick Ellsworth | CHN | -1.7 | 196609180_SLN_CHN |
Based on accumulated WAA for this season up to 1966-09-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.81 | Sandy Koufax | 288 | LAN |
| +005+ | 9.05 | Juan Marichal | 281 | SFN |
| +006+ | 8.7 | Jim Bunning | 291 | PHI |
| +010+ | 7.79 | Bob Gibson | 258.3 | SLN |
| +011+ | 7.33 | Gary Peters | 205 | CHA |
| +014+ | 6.98 | Mike Cuellar | 205.7 | HOU |
| +015+ | 6.02 | Al Jackson | 224.3 | SLN |
| +020+ | 5.5 | Jim Kaat | 275.7 | MIN |
| +027+ | 4.91 | Tommy John | 211.3 | CHA |
| +032+ | 4.45 | Bruce Howard | 149.3 | CHA |
| +035+ | 4.26 | Joe Horlen | 188 | CHA |
| +038+ | 4.11 | Sonny Siebert | 242 | CLE |
| +041+ | 3.84 | Steve Hargan | 169.7 | CLE |
| +042+ | 3.77 | Claude Osteen | 223.7 | LAN |
| +043+ | 3.66 | Jim Perry | 163.7 | MIN |
| +048+ | 3.37 | Jim Nash | 103.7 | OAK |
| +052+ | 3.2 | Steve Barber | 127 | BAL |
| +053+ | 3.08 | Dennis Ribant | 183.7 | NYN |
| +060+ | 2.77 | Jim Maloney | 206.7 | CIN |
| +063+ | 2.71 | Jim Grant | 232.3 | MIN |
| +064+ | 2.66 | Lew Krausse | 173.3 | OAK |
| +067+ | 2.57 | Gaylord Perry | 232.3 | SFN |
| +070+ | 2.5 | Dave McNally | 201 | BAL |
| +078+ | 2.3 | Bobby Bolin | 211 | SFN |
| +081+ | 2.26 | Earl Wilson | 243 | TOT |
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