| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Marichal | SFN | 6.45 | 196405311_SFN_NYN |
| Sandy Koufax | LAN | 5.68 | 196405310_LAN_PIT |
| Juan Pizarro | CHA | 5.38 | 196406010_CHA_CLE |
| Bob Friend | PIT | 3.27 | 196405310_LAN_PIT |
| Curt Simmons | SLN | 2.99 | 196406020_SLN_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Owens | HOU | -2.15 | 196405310_HOU_PHI |
| Barry Latman | ANA | -1.97 | 196406010_BOS_ANA |
| Mudcat Grant | CLE | -1.73 | 196405311_CLE_TEX |
| Bennie Daniels | TEX | -1.66 | 196405312_CLE_TEX |
| Aurelio Monteagudo | OAK | -1.13 | 196406010_BAL_OAK |
Based on accumulated WAA for this season up to 1964-06-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 3.63 | Whitey Ford | 85.3 | NYA |
| +005+ | 3 | Chris Short | 42.3 | PHI |
| +006+ | 2.86 | Jack Kralick | 69.3 | CLE |
| +007+ | 2.84 | Robin Roberts | 74.7 | BAL |
| +008+ | 2.83 | Bob Gibson | 75 | SLN |
| +009+ | 2.81 | Juan Pizarro | 56.7 | CHA |
| +014+ | 2.45 | Juan Marichal | 90.3 | SFN |
| +016+ | 2.41 | Jim Bunning | 67.3 | PHI |
| +018+ | 2.37 | Turk Farrell | 67.3 | HOU |
| +021+ | 2.28 | Don Drysdale | 94 | LAN |
| +022+ | 2.1 | Jim Maloney | 68.3 | CIN |
| +026+ | 1.98 | Dennis Bennett | 82 | PHI |
| +031+ | 1.87 | Bob Lee | 47 | ANA |
| +032+ | 1.85 | John Buzhardt | 55.3 | CHA |
| +035+ | 1.83 | Hank Fischer | 67.3 | ATL |
| +036+ | 1.78 | Dean Chance | 51 | ANA |
| +038+ | 1.72 | Phil Ortega | 66 | LAN |
| +042+ | 1.65 | Ken Johnson | 81 | HOU |
| +043+ | 1.61 | Bob Bruce | 51 | HOU |
| +045+ | 1.59 | Curt Simmons | 77.7 | SLN |
| +047+ | 1.53 | Roger Craig | 59.7 | SLN |
| +053+ | 1.38 | Galen Cisco | 51.3 | NYN |
| +057+ | 1.33 | Wally Bunker | 46.3 | BAL |
| +056+ | 1.33 | Sandy Koufax | 71.7 | LAN |
| +061+ | 1.26 | Jim Duckworth | 24.3 | TEX |
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