| Starter | Tm | Tier | Game |
|---|---|---|---|
| Juan Marichal | SFN | 7.81 | 196405200_PHI_SFN |
| Sandy Koufax | LAN | 4.72 | 196405210_NYN_LAN |
| Bob Friend | PIT | 2.98 | 196405190_PIT_HOU |
| Warren Spahn | ATL | 2.81 | 196405190_ATL_CIN |
| Robin Roberts | BAL | 2.8 | 196405190_OAK_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jack Fisher | NYN | -3.12 | 196405210_NYN_LAN |
| Bennie Daniels | TEX | -2.5 | 196405210_DET_TEX |
| Ray Sadecki | SLN | -2.36 | 196405210_CHN_SLN |
| Art Mahaffey | PHI | -1.73 | 196405200_PHI_SFN |
| Jack Hamilton | DET | -1.54 | 196405210_DET_TEX |
Based on accumulated WAA for this season up to 1964-05-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 2.82 | Jack Kralick | 48.3 | CLE |
| +003+ | 2.78 | Whitey Ford | 65 | NYA |
| +005+ | 2.47 | Jim Maloney | 54 | CIN |
| +010+ | 2.17 | Jim Bunning | 52.7 | PHI |
| +011+ | 2.1 | Juan Marichal | 72.3 | SFN |
| +012+ | 2.08 | Bob Gibson | 58 | SLN |
| +013+ | 2.08 | Turk Farrell | 58.3 | HOU |
| +014+ | 2.08 | Don Drysdale | 70.7 | LAN |
| +015+ | 2.07 | Juan Pizarro | 37.7 | CHA |
| +018+ | 1.98 | Dave Wickersham | 58 | DET |
| +019+ | 1.96 | Robin Roberts | 58 | BAL |
| +020+ | 1.95 | Phil Ortega | 52 | LAN |
| +021+ | 1.9 | Chris Short | 23.7 | PHI |
| +027+ | 1.67 | Roger Craig | 46 | SLN |
| +036+ | 1.43 | Curt Simmons | 55.3 | SLN |
| +039+ | 1.4 | Wally Bunker | 34 | BAL |
| +041+ | 1.38 | Dennis Bennett | 58 | PHI |
| +044+ | 1.25 | Bobby Bolin | 32.3 | SFN |
| XXXXX | 1.14 | Bob Bruce | 37.7 | HOU |
| XXXXX | 1.12 | Sandy Koufax | 54.7 | LAN |
| XXXXX | 1.1 | Galen Cisco | 31.3 | NYN |
| XXXXX | 1.09 | Bob Lee | 36.7 | ANA |
| XXXXX | 1.07 | Tony Cloninger | 40.3 | ATL |
| XXXXX | 1.07 | Milt Pappas | 45 | BAL |
| XXXXX | 1.03 | John Buzhardt | 30.7 | CHA |
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