| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim O'Toole | CIN | 5.69 | 196305230_CIN_ATL |
| Dick Donovan | CLE | 3.73 | 196305220_ANA_CLE |
| Steve Barber | BAL | 3.13 | 196305220_DET_BAL |
| Curt Simmons | SLN | 3.11 | 196305210_SLN_CHN |
| Don Drysdale | LAN | 2.54 | 196305220_NYN_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Galen Cisco | NYN | -2.98 | 196305210_NYN_LAN |
| Joe Horlen | CHA | -1.58 | 196305220_CHA_TEX |
| Jim Perry | MIN | -1.19 | 196305210_MIN_BOS |
| Arnold Earley | BOS | -0.86 | 196305220_MIN_BOS |
| Vern Law | PIT | -0.59 | 196305220_PIT_HOU |
Based on accumulated WAA for this season up to 1963-05-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.7 | Sandy Koufax | 68 | LAN |
| +002+ | 3.62 | Dick Ellsworth | 65.7 | CHN |
| +004+ | 3.07 | Steve Barber | 87.3 | BAL |
| +007+ | 2.71 | Jim O'Toole | 78 | CIN |
| +010+ | 2.5 | Ernie Broglio | 72.3 | SLN |
| +012+ | 2.43 | Milt Pappas | 45.7 | BAL |
| +014+ | 2.29 | Denny Lemaster | 48.7 | ATL |
| +016+ | 2.19 | Curt Simmons | 63.3 | SLN |
| +017+ | 2.17 | Juan Pizarro | 54.3 | CHA |
| +018+ | 2.13 | Don Schwall | 43.7 | PIT |
| +020+ | 2.01 | Jack Sanford | 88.7 | SFN |
| +023+ | 1.87 | Jim Maloney | 60.3 | CIN |
| +025+ | 1.85 | Ray Herbert | 58.3 | CHA |
| +027+ | 1.78 | Larry Jackson | 79.3 | CHN |
| +028+ | 1.76 | Joe Nuxhall | 54 | CIN |
| +029+ | 1.73 | Al Jackson | 74.7 | NYN |
| +037+ | 1.48 | Carl Willey | 48.7 | NYN |
| +042+ | 1.33 | Orlando Pena | 55 | OAK |
| +046+ | 1.3 | Joe Gibbon | 31 | PIT |
| +045+ | 1.3 | Robin Roberts | 68 | BAL |
| +048+ | 1.26 | Turk Farrell | 64.7 | HOU |
| XXXXX | 1.22 | Earl Wilson | 65.3 | BOS |
| XXXXX | 1.2 | Tom Cheney | 60.3 | TEX |
| XXXXX | 1.18 | Billy O'Dell | 59.7 | SFN |
| XXXXX | 1.17 | Warren Spahn | 68.3 | ATL |
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