| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sandy Koufax | LAN | 10.65 | 196306210_LAN_SLN |
| Jim O'Toole | CIN | 8.73 | 196306200_PHI_CIN |
| Ralph Terry | NYA | 3.86 | 196306210_NYA_BOS |
| Juan Pizarro | CHA | 2.72 | 196306210_CHA_CLE |
| Larry Jackson | CHN | 2.62 | 196306200_HOU_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ray Sadecki | SLN | -3.59 | 196306190_NYN_SLN |
| Don Rudolph | TEX | -1.59 | 196306210_TEX_ANA |
| Al Jackson | NYN | -1.03 | 196306210_PHI_NYN |
| Ike Delock | BAL | -0.96 | 196306211_BAL_MIN |
| Diego Segui | OAK | -0.82 | 196306192_OAK_ANA |
Based on accumulated WAA for this season up to 1963-06-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5 | Sandy Koufax | 124.7 | LAN |
| +003+ | 4.89 | Jim O'Toole | 130 | CIN |
| +006+ | 4.56 | Dick Ellsworth | 113 | CHN |
| +008+ | 4.2 | Larry Jackson | 129.3 | CHN |
| +010+ | 3.45 | Juan Pizarro | 107.7 | CHA |
| +012+ | 3.3 | Bob Friend | 116.7 | PIT |
| +014+ | 3.18 | Denny Lemaster | 92.3 | ATL |
| +015+ | 3.07 | Juan Marichal | 125.3 | SFN |
| +016+ | 2.93 | John Buzhardt | 98.7 | CHA |
| +019+ | 2.83 | Jim Bouton | 95.3 | NYA |
| +022+ | 2.73 | Jack Sanford | 129 | SFN |
| +026+ | 2.59 | Ernie Broglio | 106.7 | SLN |
| +029+ | 2.33 | Earl Wilson | 105 | BOS |
| +031+ | 2.27 | Bobby Bolin | 53.7 | SFN |
| +032+ | 2.23 | Don Schwall | 80.7 | PIT |
| +034+ | 2.19 | Camilo Pascual | 105.7 | MIN |
| +037+ | 2.12 | Jack Kralick | 91.3 | TOT |
| +039+ | 2.09 | Steve Barber | 123 | BAL |
| +041+ | 2.08 | Bob Buhl | 121.3 | CHN |
| +049+ | 1.87 | Ray Culp | 98.3 | PHI |
| +051+ | 1.81 | Al McBean | 65.3 | PIT |
| +052+ | 1.8 | Ken McBride | 122.7 | ANA |
| +056+ | 1.75 | Billy O'Dell | 104 | SFN |
| +059+ | 1.7 | Turk Farrell | 85.3 | HOU |
| +061+ | 1.68 | Milt Pappas | 82 | BAL |
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