| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 10.35 | 197307031_CHA_TEX |
| Bert Blyleven | MIN | 8.32 | 197307030_MIN_KCA |
| Tom Seaver | NYN | 8.23 | 197307040_NYN_WAS |
| Ken Holtzman | OAK | 3.98 | 197307030_ANA_OAK |
| Gaylord Perry | CLE | 3.03 | 197307030_DET_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Steve Blass | PIT | -9.24 | 197307032_PIT_SLN |
| Woodie Fryman | DET | -2.57 | 197307020_DET_CLE |
| Jim Lonborg | PHI | -2.35 | 197307030_PHI_CHN |
| Ron Reed | ATL | -2.05 | 197307041_HOU_ATL |
| Pete Broberg | TEX | -1.98 | 197307031_CHA_TEX |
Based on accumulated WAA for this season up to 1973-07-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.56 | Ken Holtzman | 167 | OAK |
| +004+ | 5.29 | Wilbur Wood | 209.7 | CHA |
| +005+ | 5.13 | Bill Singer | 168 | ANA |
| +007+ | 4.97 | Tom Seaver | 137.7 | NYN |
| +008+ | 4.81 | Rick Reuschel | 127.3 | CHN |
| +010+ | 4.52 | Wayne Twitchell | 114.7 | PHI |
| +012+ | 4.3 | Bert Blyleven | 158.7 | MIN |
| +013+ | 3.98 | Bill Lee | 129 | BOS |
| +014+ | 3.78 | Don Sutton | 148 | LAN |
| +017+ | 3.51 | Ron Bryant | 143.7 | SFN |
| +019+ | 3.46 | Dave McNally | 133.7 | BAL |
| +021+ | 3.24 | Rollie Fingers | 60.7 | OAK |
| +022+ | 3.15 | Jim Palmer | 130 | BAL |
| +029+ | 2.81 | Nolan Ryan | 165.3 | ANA |
| +033+ | 2.72 | Ross Grimsley | 118.3 | CIN |
| +034+ | 2.71 | Sonny Siebert | 72.3 | TOT |
| +038+ | 2.56 | Rick Wise | 134.7 | SLN |
| +040+ | 2.47 | Clyde Wright | 132 | ANA |
| +043+ | 2.44 | Jim Colborn | 138.7 | MIL |
| +047+ | 2.31 | Stan Bahnsen | 142 | CHA |
| +055+ | 2.13 | John Curtis | 119.7 | BOS |
| +056+ | 2.1 | Dave Roberts | 117 | HOU |
| +059+ | 2.06 | Paul Splittorff | 146.7 | KCA |
| +062+ | 2.04 | Doc Medich | 114.7 | NYA |
| +065+ | 2.02 | Jerry Koosman | 122.7 | NYN |
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