| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 10.35 | 197307031_CHA_TEX |
| Jim Palmer | BAL | 8.49 | 197307011_BAL_DET |
| Bert Blyleven | MIN | 8.32 | 197307030_MIN_KCA |
| Don Sutton | LAN | 6.34 | 197307011_LAN_CIN |
| Bill Lee | BOS | 5.47 | 197307011_MIL_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Steve Blass | PIT | -9.24 | 197307032_PIT_SLN |
| Johnny Odom | OAK | -2.66 | 197307012_CHA_OAK |
| Woodie Fryman | DET | -2.57 | 197307020_DET_CLE |
| Jim Lonborg | PHI | -2.35 | 197307030_PHI_CHN |
| Pete Broberg | TEX | -1.98 | 197307031_CHA_TEX |
Based on accumulated WAA for this season up to 1973-07-03.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.57 | Ken Holtzman | 167 | OAK |
| +004+ | 5.29 | Wilbur Wood | 209.7 | CHA |
| +006+ | 4.97 | Tom Seaver | 130.3 | NYN |
| +008+ | 4.83 | Rick Reuschel | 127.3 | CHN |
| +009+ | 4.72 | Bill Singer | 160.7 | ANA |
| +010+ | 4.3 | Bert Blyleven | 158.7 | MIN |
| +011+ | 4.23 | Wayne Twitchell | 108.7 | PHI |
| +013+ | 3.99 | Bill Lee | 129 | BOS |
| +014+ | 3.78 | Don Sutton | 148 | LAN |
| +016+ | 3.52 | Ron Bryant | 143.7 | SFN |
| +019+ | 3.46 | Dave McNally | 133.7 | BAL |
| +021+ | 3.16 | Jim Palmer | 130 | BAL |
| +025+ | 3.04 | Rollie Fingers | 58.3 | OAK |
| +028+ | 2.81 | Nolan Ryan | 165.3 | ANA |
| +031+ | 2.73 | Ross Grimsley | 118.3 | CIN |
| +032+ | 2.71 | Sonny Siebert | 72.3 | TOT |
| +035+ | 2.64 | Phil Niekro | 109.7 | ATL |
| +037+ | 2.56 | Rick Wise | 134.7 | SLN |
| +039+ | 2.48 | Clyde Wright | 132 | ANA |
| +044+ | 2.43 | Ray Corbin | 65.3 | MIN |
| +043+ | 2.43 | Jim Colborn | 138.7 | MIL |
| +048+ | 2.31 | Stan Bahnsen | 142 | CHA |
| +049+ | 2.29 | Dave Roberts | 116.7 | HOU |
| +059+ | 2.14 | John Curtis | 119.7 | BOS |
| +062+ | 2.07 | Paul Splittorff | 146.7 | KCA |
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