| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 9.56 | 196306090_LAN_CHN |
| Whitey Ford | NYA | 5.53 | 196306090_NYA_DET |
| Warren Spahn | ATL | 4.05 | 196306092_ATL_PIT |
| Bob Friend | PIT | 4.01 | 196306091_ATL_PIT |
| Larry Jackson | CHN | 2.55 | 196306110_CHN_HOU |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jay Hook | NYN | -8.22 | 196306092_SLN_NYN |
| Ray Sadecki | SLN | -3.84 | 196306092_SLN_NYN |
| Glen Hobbie | CHN | -1.48 | 196306100_CHN_HOU |
| Sam McDowell | CLE | -1.22 | 196306090_CLE_TEX |
| Don Rudolph | TEX | -1.06 | 196306101_NYA_TEX |
Based on accumulated WAA for this season up to 1963-06-11.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +004+ | 3.72 | Larry Jackson | 113.3 | CHN |
| +007+ | 3.52 | Dick Ellsworth | 95.3 | CHN |
| +008+ | 3.44 | Sandy Koufax | 98 | LAN |
| +009+ | 3.18 | Jim O'Toole | 103.7 | CIN |
| +011+ | 3.09 | Bob Friend | 104 | PIT |
| +012+ | 3.07 | Denny Lemaster | 75 | ATL |
| +019+ | 2.71 | Juan Pizarro | 83.3 | CHA |
| +021+ | 2.58 | Bob Buhl | 99.3 | CHN |
| +023+ | 2.28 | Steve Barber | 111 | BAL |
| +024+ | 2.25 | Jim Bouton | 78 | NYA |
| +026+ | 2.23 | John Buzhardt | 77.3 | CHA |
| +031+ | 2.16 | Jack Sanford | 111.7 | SFN |
| +034+ | 2.02 | Ernie Broglio | 92 | SLN |
| +035+ | 2 | Don Schwall | 70.3 | PIT |
| +036+ | 1.94 | Carl Willey | 80 | NYN |
| +037+ | 1.93 | Tom Cheney | 88.7 | TEX |
| +039+ | 1.92 | Milt Pappas | 67.7 | BAL |
| +040+ | 1.91 | Juan Marichal | 108.7 | SFN |
| +042+ | 1.84 | Camilo Pascual | 100.7 | MIN |
| +049+ | 1.6 | Ray Culp | 83.3 | PHI |
| +052+ | 1.59 | Turk Farrell | 85.3 | HOU |
| +054+ | 1.58 | Don Drysdale | 124.7 | LAN |
| +056+ | 1.52 | Ken McBride | 108.7 | ANA |
| +058+ | 1.48 | Whitey Ford | 89 | NYA |
| +062+ | 1.37 | Bobby Bolin | 32.3 | SFN |
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