| Starter | Tm | Tier | Game |
|---|---|---|---|
| Whitey Ford | NYA | 11.32 | 196405050_DET_NYA |
| Don Drysdale | LAN | 6.44 | 196405060_HOU_LAN |
| Warren Spahn | ATL | 5.07 | 196405050_NYN_ATL |
| Bob Friend | PIT | 4.93 | 196405060_SLN_PIT |
| Gary Peters | CHA | 3.49 | 196405061_OAK_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Sadecki | SLN | -5.37 | 196405060_SLN_PIT |
| Bennie Daniels | TEX | -3.51 | 196405061_NYA_TEX |
| Barry Latman | ANA | -2.87 | 196405050_ANA_OAK |
| Mike McCormick | BAL | -2.8 | 196405060_BAL_CLE |
| Mudcat Grant | CLE | -2.1 | 196405070_BAL_CLE |
Based on accumulated WAA for this season up to 1964-05-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 1.93 | Robin Roberts | 36 | BAL |
| +004+ | 1.8 | Jack Kralick | 30.3 | CLE |
| +005+ | 1.66 | Ken Johnson | 44 | HOU |
| +009+ | 1.57 | Jim Maloney | 37 | CIN |
| +010+ | 1.55 | Jim Bunning | 31.7 | PHI |
| +011+ | 1.54 | Gary Peters | 34.7 | CHA |
| +013+ | 1.53 | Whitey Ford | 44 | NYA |
| +014+ | 1.46 | Dave Wickersham | 34 | DET |
| +018+ | 1.32 | Phil Ortega | 28 | LAN |
| +020+ | 1.26 | Bob Gibson | 37 | SLN |
| XXXXX | 1.17 | Bob Lee | 26.3 | ANA |
| XXXXX | 1.08 | Dave Morehead | 22.3 | BOS |
| XXXXX | 1.07 | Roger Craig | 32.3 | SLN |
| XXXXX | 1.02 | Juan Marichal | 40 | SFN |
| XXXXX | 0.96 | Pedro Ramos | 25 | CLE |
| XXXXX | 0.93 | Turk Farrell | 33 | HOU |
| XXXXX | 0.9 | Sandy Koufax | 28 | LAN |
| XXXXX | 0.89 | Dean Chance | 18 | ANA |
| XXXXX | 0.88 | Don Drysdale | 47.7 | LAN |
| XXXXX | 0.88 | Warren Spahn | 39 | ATL |
| XXXXX | 0.85 | Al Downing | 23 | NYA |
| XXXXX | 0.81 | Jack Lamabe | 38.7 | BOS |
| XXXXX | 0.75 | John Buzhardt | 20.7 | CHA |
| XXXXX | 0.73 | Galen Cisco | 10.3 | NYN |
| XXXXX | 0.72 | Tommy John | 9 | CLE |
_