| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim O'Toole | CIN | 8.12 | 196306162_NYN_CIN |
| Bob Friend | PIT | 5.18 | 196306140_PIT_SLN |
| Warren Spahn | ATL | 3.81 | 196306140_PHI_ATL |
| Don Drysdale | LAN | 3.21 | 196306150_CHN_LAN |
| Ralph Terry | NYA | 2.92 | 196306161_DET_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Craig | NYN | -1.97 | 196306162_NYN_CIN |
| Don Rudolph | TEX | -1.64 | 196306162_TEX_CLE |
| Glen Hobbie | CHN | -1.01 | 196306140_CHN_LAN |
| Ike Delock | BAL | -0.8 | 196306161_BAL_BOS |
| Diego Segui | OAK | -0.7 | 196306150_OAK_CHA |
Based on accumulated WAA for this season up to 1963-06-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 4.45 | Jim O'Toole | 122 | CIN |
| +005+ | 4.16 | Sandy Koufax | 107 | LAN |
| +008+ | 3.88 | Dick Ellsworth | 104.7 | CHN |
| +009+ | 3.47 | Larry Jackson | 120.3 | CHN |
| +010+ | 3.25 | John Buzhardt | 95.3 | CHA |
| +014+ | 2.97 | Bob Friend | 110.3 | PIT |
| +018+ | 2.68 | Juan Pizarro | 98.7 | CHA |
| +019+ | 2.66 | Denny Lemaster | 83.3 | ATL |
| +020+ | 2.64 | Bob Buhl | 115.3 | CHN |
| +021+ | 2.62 | Juan Marichal | 117.7 | SFN |
| +023+ | 2.6 | Jack Sanford | 120 | SFN |
| +024+ | 2.54 | Jim Bouton | 87 | NYA |
| +028+ | 2.18 | Camilo Pascual | 105.7 | MIN |
| +030+ | 2.14 | Carl Willey | 87.3 | NYN |
| +032+ | 2.09 | Don Drysdale | 133.7 | LAN |
| +033+ | 2.09 | Bobby Bolin | 49 | SFN |
| +036+ | 2.06 | Tom Cheney | 96.3 | TEX |
| +040+ | 1.96 | Steve Barber | 117 | BAL |
| +043+ | 1.84 | Ernie Broglio | 97.7 | SLN |
| +047+ | 1.78 | Don Schwall | 75.3 | PIT |
| +048+ | 1.76 | Al McBean | 62.3 | PIT |
| +052+ | 1.64 | Turk Farrell | 85.3 | HOU |
| +053+ | 1.63 | Dallas Green | 40 | PHI |
| +056+ | 1.59 | Ray Culp | 90.3 | PHI |
| +058+ | 1.58 | Earl Wilson | 96 | BOS |
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