| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 8.49 | 196305240_LAN_SFN |
| Warren Spahn | ATL | 5.99 | 196305240_PIT_ATL |
| Jim O'Toole | CIN | 5.69 | 196305230_CIN_ATL |
| Whitey Ford | NYA | 4.29 | 196305240_TEX_NYA |
| Dick Donovan | CLE | 3.73 | 196305220_ANA_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Craig | NYN | -2.18 | 196305240_NYN_SLN |
| Joe Horlen | CHA | -1.58 | 196305220_CHA_TEX |
| Arnold Earley | BOS | -0.86 | 196305220_MIN_BOS |
| Sam McDowell | CLE | -0.86 | 196305240_BAL_CLE |
| Bob Bruce | HOU | -0.72 | 196305240_HOU_CHN |
Based on accumulated WAA for this season up to 1963-05-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.6 | Dick Ellsworth | 65.7 | CHN |
| +003+ | 3.11 | Steve Barber | 87.3 | BAL |
| +006+ | 2.74 | Jim O'Toole | 78 | CIN |
| +007+ | 2.72 | Sandy Koufax | 68.3 | LAN |
| +011+ | 2.53 | Ernie Broglio | 72.3 | SLN |
| +012+ | 2.45 | Milt Pappas | 45.7 | BAL |
| +015+ | 2.32 | Denny Lemaster | 48.7 | ATL |
| +017+ | 2.22 | Curt Simmons | 63.3 | SLN |
| +018+ | 2.2 | Juan Pizarro | 54.3 | CHA |
| +019+ | 2.15 | Don Schwall | 43.7 | PIT |
| +020+ | 2.05 | Jack Sanford | 88.7 | SFN |
| +022+ | 1.89 | Jim Maloney | 60.3 | CIN |
| +029+ | 1.78 | Al Jackson | 74.7 | NYN |
| +028+ | 1.78 | Joe Nuxhall | 54 | CIN |
| +030+ | 1.76 | Larry Jackson | 79.3 | CHN |
| +035+ | 1.67 | Bob Friend | 73.3 | PIT |
| +039+ | 1.51 | Carl Willey | 48.7 | NYN |
| +043+ | 1.35 | Orlando Pena | 55 | OAK |
| +044+ | 1.33 | Robin Roberts | 68 | BAL |
| +045+ | 1.31 | Joe Gibbon | 31 | PIT |
| +050+ | 1.25 | Earl Wilson | 65.3 | BOS |
| XXXXX | 1.24 | Turk Farrell | 64.7 | HOU |
| XXXXX | 1.24 | Tom Cheney | 60.3 | TEX |
| XXXXX | 1.2 | Billy O'Dell | 59.7 | SFN |
| XXXXX | 1.17 | Juan Marichal | 75 | SFN |
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