| Starter | Tm | Tier | Game |
|---|---|---|---|
| Whitey Ford | NYA | 9.73 | 196407192_CLE_NYA |
| Don Drysdale | LAN | 9.46 | 196407210_HOU_LAN |
| Dean Chance | ANA | 5.6 | 196407192_ANA_MIN |
| Juan Pizarro | CHA | 4.91 | 196407191_OAK_CHA |
| Juan Marichal | SFN | 4.81 | 196407191_HOU_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tracy Stallard | NYN | -2.47 | 196407210_NYN_CIN |
| Dave Morehead | BOS | -2.11 | 196407191_TEX_BOS |
| Ray Sadecki | SLN | -1.82 | 196407210_PIT_SLN |
| Phil Regan | DET | -1.68 | 196407200_DET_BOS |
| Lee Stange | CLE | -1.57 | 196407211_CLE_BAL |
Based on accumulated WAA for this season up to 1964-07-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 6.22 | Sandy Koufax | 162.7 | LAN |
| +003+ | 5.92 | Dean Chance | 138.3 | ANA |
| +004+ | 5.79 | Don Drysdale | 193.3 | LAN |
| +006+ | 5.42 | Jim Bunning | 157 | PHI |
| +010+ | 4.83 | Whitey Ford | 164 | NYA |
| +012+ | 4.66 | Juan Pizarro | 141.7 | CHA |
| +018+ | 3.93 | Juan Marichal | 174.7 | SFN |
| +020+ | 3.91 | Chris Short | 102.3 | PHI |
| +027+ | 3.45 | Gary Peters | 149.7 | CHA |
| +031+ | 3.27 | Joe Horlen | 93 | CHA |
| +033+ | 3.02 | Ron Herbel | 107.7 | SFN |
| +034+ | 3 | Bob Bruce | 118.3 | HOU |
| +038+ | 2.93 | Dick Ellsworth | 167.7 | CHN |
| +037+ | 2.93 | Jack Kralick | 130.7 | CLE |
| +040+ | 2.85 | Robin Roberts | 130 | BAL |
| +045+ | 2.61 | Gaylord Perry | 90 | SFN |
| +050+ | 2.51 | Bob Gibson | 149 | SLN |
| +055+ | 2.37 | Roger Craig | 110.7 | SLN |
| +058+ | 2.25 | Jim O'Toole | 114 | CIN |
| +059+ | 2.24 | Fred Newman | 97 | ANA |
| +061+ | 2.19 | Hank Fischer | 108.7 | ATL |
| +062+ | 2.06 | Bobby Bolin | 98.7 | SFN |
| +064+ | 2.06 | Bo Belinsky | 107.3 | ANA |
| +070+ | 1.93 | Bob Veale | 145.3 | PIT |
| +071+ | 1.92 | Jim Maloney | 135 | CIN |
_