| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 8.3 | 196306010_LAN_CIN |
| Whitey Ford | NYA | 5.01 | 196305310_NYA_CLE |
| Warren Spahn | ATL | 4.51 | 196305300_LAN_ATL |
| Bob Friend | PIT | 3.78 | 196306010_PIT_NYN |
| Curt Simmons | SLN | 2.48 | 196305310_SFN_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jay Hook | NYN | -9.52 | 196305302_CHN_NYN |
| Ray Sadecki | SLN | -3.75 | 196305300_HOU_SLN |
| Gene Conley | BOS | -2.79 | 196305310_BOS_CHA |
| Glen Hobbie | CHN | -1.59 | 196305302_CHN_NYN |
| Jack Fisher | SFN | -1.45 | 196306010_SFN_SLN |
Based on accumulated WAA for this season up to 1963-06-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.59 | Dick Ellsworth | 82.7 | CHN |
| +003+ | 3.77 | Sandy Koufax | 84.3 | LAN |
| +005+ | 3.25 | Larry Jackson | 97.3 | CHN |
| +008+ | 2.98 | Don Schwall | 59 | PIT |
| +014+ | 2.59 | Denny Lemaster | 55.7 | ATL |
| +016+ | 2.34 | Bob Friend | 87 | PIT |
| +019+ | 2.12 | Jim O'Toole | 86 | CIN |
| +022+ | 1.99 | Bob Buhl | 84.3 | CHN |
| +024+ | 1.99 | Steve Barber | 96.3 | BAL |
| +023+ | 1.99 | Jack Sanford | 97.7 | SFN |
| +026+ | 1.97 | Jim Bouton | 68 | NYA |
| +028+ | 1.96 | Carl Willey | 64.3 | NYN |
| +033+ | 1.76 | Milt Pappas | 55 | BAL |
| +034+ | 1.74 | Robin Roberts | 75.3 | BAL |
| +036+ | 1.72 | Tom Cheney | 75.7 | TEX |
| +040+ | 1.55 | Joe Nuxhall | 69 | CIN |
| +046+ | 1.47 | Curt Simmons | 75.3 | SLN |
| +044+ | 1.47 | Ernie Broglio | 78 | SLN |
| +043+ | 1.47 | John Buzhardt | 68.3 | CHA |
| +057+ | 1.28 | Jim Maloney | 73.3 | CIN |
| +056+ | 1.28 | Juan Pizarro | 63.3 | CHA |
| XXXXX | 1.21 | Joe Gibbon | 42.7 | PIT |
| XXXXX | 1.17 | Dallas Green | 27 | PHI |
| XXXXX | 1.11 | Billy O'Dell | 73.7 | SFN |
| XXXXX | 1.05 | Cal McLish | 66.3 | PHI |
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