| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Friend | PIT | 8.35 | 196307270_PIT_SFN |
| Juan Marichal | SFN | 5.99 | 196307270_PIT_SFN |
| Larry Jackson | CHN | 5.51 | 196307270_SLN_CHN |
| Juan Pizarro | CHA | 4.52 | 196307272_CHA_BAL |
| Don Drysdale | LAN | 3.14 | 196307280_PHI_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Sadecki | SLN | -3.23 | 196307281_SLN_CHN |
| Roger Craig | NYN | -2.02 | 196307270_NYN_HOU |
| Jerry Walker | CLE | -2.01 | 196307281_OAK_CLE |
| Paul Foytack | ANA | -1.78 | 196307282_ANA_BOS |
| Bennie Daniels | TEX | -1.09 | 196307282_TEX_DET |
Based on accumulated WAA for this season up to 1963-07-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 7.11 | Dick Ellsworth | 188.7 | CHN |
| +003+ | 6.83 | Sandy Koufax | 185.7 | LAN |
| +004+ | 6.7 | Bob Friend | 187.3 | PIT |
| +005+ | 6.56 | Juan Marichal | 198.3 | SFN |
| +008+ | 5.66 | Larry Jackson | 183.7 | CHN |
| +010+ | 5.13 | Juan Pizarro | 159.7 | CHA |
| +011+ | 5.12 | Jim O'Toole | 172 | CIN |
| +014+ | 4.48 | Gary Peters | 136 | CHA |
| +017+ | 4.04 | Ken McBride | 187.7 | ANA |
| +019+ | 3.83 | Denny Lemaster | 159 | ATL |
| +025+ | 3.47 | Joe Nuxhall | 129 | CIN |
| +030+ | 3.29 | Camilo Pascual | 135.7 | MIN |
| +034+ | 3.07 | John Buzhardt | 126.3 | CHA |
| +040+ | 2.82 | Steve Barber | 166.3 | BAL |
| +042+ | 2.74 | Ray Culp | 144.3 | PHI |
| +043+ | 2.72 | Warren Spahn | 155.7 | ATL |
| +044+ | 2.72 | Milt Pappas | 139.3 | BAL |
| +045+ | 2.7 | Jim Bouton | 151 | NYA |
| +046+ | 2.67 | Don Drysdale | 207 | LAN |
| +050+ | 2.54 | Don Schwall | 113.3 | PIT |
| +051+ | 2.51 | Jim Maloney | 160.7 | CIN |
| +053+ | 2.49 | Tom Cheney | 128.7 | TEX |
| +060+ | 2.31 | Bobby Bolin | 78 | SFN |
| +058+ | 2.31 | Johnny Podres | 137.7 | LAN |
| +061+ | 2.28 | Bob Buhl | 162.3 | CHN |
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