| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim O'Toole | CIN | 8.73 | 196306200_PHI_CIN |
| Whitey Ford | NYA | 5.35 | 196306180_TEX_NYA |
| Bob Friend | PIT | 4.96 | 196306180_PIT_ATL |
| Warren Spahn | ATL | 4.62 | 196306180_PIT_ATL |
| Don Drysdale | LAN | 3.76 | 196306190_LAN_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Sadecki | SLN | -3.59 | 196306190_NYN_SLN |
| Barry Latman | CLE | -0.86 | 196306180_BAL_CLE |
| Moe Drabowsky | OAK | -0.85 | 196306180_OAK_ANA |
| Joe Horlen | CHA | -0.77 | 196306180_CHA_MIN |
| Arnold Earley | BOS | -0.75 | 196306200_DET_BOS |
Based on accumulated WAA for this season up to 1963-06-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 4.96 | Sandy Koufax | 116 | LAN |
| +003+ | 4.92 | Jim O'Toole | 130 | CIN |
| +006+ | 4.6 | Dick Ellsworth | 113 | CHN |
| +007+ | 4.25 | Larry Jackson | 129.3 | CHN |
| +010+ | 3.34 | Bob Friend | 116.7 | PIT |
| +012+ | 3.19 | Denny Lemaster | 92.3 | ATL |
| +014+ | 3.08 | Juan Marichal | 125.3 | SFN |
| +016+ | 2.95 | John Buzhardt | 98.7 | CHA |
| +017+ | 2.84 | Jim Bouton | 95.3 | NYA |
| +020+ | 2.75 | Jack Sanford | 129 | SFN |
| +021+ | 2.74 | Juan Pizarro | 98.7 | CHA |
| +022+ | 2.69 | Bob Buhl | 115.3 | CHN |
| +025+ | 2.61 | Ernie Broglio | 106.7 | SLN |
| +029+ | 2.35 | Earl Wilson | 105 | BOS |
| +030+ | 2.25 | Don Schwall | 80.7 | PIT |
| +031+ | 2.22 | Camilo Pascual | 105.7 | MIN |
| +034+ | 2.14 | Jack Kralick | 91.3 | TOT |
| +036+ | 2.11 | Steve Barber | 123 | BAL |
| +039+ | 2.1 | Bobby Bolin | 49 | SFN |
| +048+ | 1.88 | Ray Culp | 98.3 | PHI |
| +052+ | 1.82 | Ken McBride | 122.7 | ANA |
| +057+ | 1.76 | Billy O'Dell | 104 | SFN |
| +058+ | 1.71 | Turk Farrell | 85.3 | HOU |
| +060+ | 1.69 | Don Drysdale | 138 | LAN |
| +061+ | 1.69 | Milt Pappas | 82 | BAL |
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