| Starter | Tm | Tier | Game |
|---|---|---|---|
| Whitey Ford | NYA | 8.28 | 196405130_NYA_DET |
| Don Drysdale | LAN | 6.96 | 196405142_LAN_CHN |
| Juan Marichal | SFN | 6.4 | 196405120_SFN_HOU |
| Warren Spahn | ATL | 4 | 196405140_ATL_NYN |
| Robin Roberts | BAL | 3.08 | 196405140_BAL_TEX |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Fisher | NYN | -3.67 | 196405130_ATL_NYN |
| Mudcat Grant | CLE | -1.76 | 196405120_BOS_CLE |
| Barry Latman | ANA | -1.36 | 196405131_OAK_ANA |
| Art Mahaffey | PHI | -1.29 | 196405120_SLN_PHI |
| Dave McNally | BAL | -1 | 196405120_BAL_TEX |
Based on accumulated WAA for this season up to 1964-05-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 2.65 | Juan Marichal | 57.7 | SFN |
| +006+ | 2.29 | Don Drysdale | 65.7 | LAN |
| +007+ | 2.22 | Jack Kralick | 39.3 | CLE |
| +009+ | 2.14 | Dave Wickersham | 43 | DET |
| +011+ | 2.08 | Whitey Ford | 56 | NYA |
| +012+ | 1.92 | Jim Maloney | 45 | CIN |
| +013+ | 1.9 | Bob Gibson | 46 | SLN |
| +014+ | 1.88 | Juan Pizarro | 30.7 | CHA |
| +018+ | 1.71 | Robin Roberts | 50 | BAL |
| +021+ | 1.52 | Turk Farrell | 42 | HOU |
| +025+ | 1.36 | Jim Bunning | 43.7 | PHI |
| +027+ | 1.31 | Wally Bunker | 18 | BAL |
| +030+ | 1.28 | Roger Craig | 41.3 | SLN |
| XXXXX | 1.24 | Phil Ortega | 34 | LAN |
| XXXXX | 1.18 | Al Jackson | 50.3 | NYN |
| XXXXX | 1.15 | Hank Fischer | 41.3 | ATL |
| XXXXX | 1.1 | Ken Johnson | 51.7 | HOU |
| XXXXX | 1.06 | Chris Short | 14.3 | PHI |
| XXXXX | 0.99 | Galen Cisco | 22.7 | NYN |
| XXXXX | 0.94 | Jim Kaat | 45.3 | MIN |
| XXXXX | 0.86 | Ray Washburn | 14.7 | SLN |
| XXXXX | 0.85 | Joe Gibbon | 38.7 | PIT |
| XXXXX | 0.84 | Al Downing | 23 | NYA |
| XXXXX | 0.82 | Dave Morehead | 30.3 | BOS |
| XXXXX | 0.8 | Dean Chance | 21.7 | ANA |
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