| Starter | Tm | Tier | Game |
|---|---|---|---|
| Don Drysdale | LAN | 9.34 | 196406280_LAN_SFN |
| Juan Pizarro | CHA | 4.12 | 196406300_CHA_CLE |
| Chris Short | PHI | 3.22 | 196406281_PHI_SLN |
| Bob Friend | PIT | 3.08 | 196406282_CIN_PIT |
| Jim Maloney | CIN | 2.59 | 196406282_CIN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Moe Drabowsky | OAK | -3.46 | 196406300_OAK_BOS |
| Jack Fisher | NYN | -2.25 | 196406290_NYN_SFN |
| Phil Regan | DET | -2.01 | 196406290_DET_TEX |
| Ray Sadecki | SLN | -1.83 | 196406282_PHI_SLN |
| Bill Monbouquette | BOS | -1.68 | 196406282_CLE_BOS |
Based on accumulated WAA for this season up to 1964-06-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 4.89 | Don Drysdale | 153.7 | LAN |
| +004+ | 4.69 | Sandy Koufax | 122.7 | LAN |
| +005+ | 4.63 | Whitey Ford | 133.3 | NYA |
| +006+ | 4.28 | Jim Bunning | 124.7 | PHI |
| +007+ | 4.13 | Dean Chance | 102.3 | ANA |
| +009+ | 4.07 | Chris Short | 85 | PHI |
| +018+ | 3.18 | Juan Pizarro | 106.7 | CHA |
| +019+ | 3.09 | Bob Gibson | 116.3 | SLN |
| +023+ | 2.94 | Juan Marichal | 134.3 | SFN |
| +024+ | 2.92 | Ron Herbel | 85 | SFN |
| +031+ | 2.57 | Gaylord Perry | 60 | SFN |
| +032+ | 2.56 | Gary Peters | 111.7 | CHA |
| +035+ | 2.5 | Robin Roberts | 110.3 | BAL |
| +038+ | 2.34 | Jim Maloney | 108 | CIN |
| +039+ | 2.34 | Dick Ellsworth | 135 | CHN |
| +042+ | 2.25 | Jack Kralick | 109.7 | CLE |
| +051+ | 2.02 | Roger Craig | 89.3 | SLN |
| +052+ | 2.01 | Turk Farrell | 105 | HOU |
| +054+ | 1.97 | Dave Wickersham | 125.3 | DET |
| +057+ | 1.9 | Claude Osteen | 111.3 | TEX |
| +063+ | 1.8 | Jim Bouton | 121.7 | NYA |
| +074+ | 1.63 | Joe Gibbon | 65.7 | PIT |
| +075+ | 1.61 | Tony Cloninger | 99.3 | ATL |
| +078+ | 1.59 | Hank Fischer | 89.3 | ATL |
| +082+ | 1.55 | Bob Bruce | 89.7 | HOU |
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