| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 11.42 | 197307060_BOS_CHA |
| Tom Seaver | NYN | 8.23 | 197307040_NYN_WAS |
| Jim Palmer | BAL | 7.58 | 197307061_OAK_BAL |
| Don Sutton | LAN | 5.92 | 197307060_PIT_LAN |
| Bill Lee | BOS | 3.39 | 197307050_BOS_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Brent Strom | CLE | -2.19 | 197307050_CLE_DET |
| Steve Arlin | SDN | -2.16 | 197307050_SDN_LAN |
| Ron Reed | ATL | -2.05 | 197307041_HOU_ATL |
| Steve Busby | KCA | -2.05 | 197307060_DET_KCA |
| Steve Dunning | TEX | -1.93 | 197307041_CHA_TEX |
Based on accumulated WAA for this season up to 1973-07-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.68 | Ken Holtzman | 167 | OAK |
| +004+ | 5.21 | Bill Singer | 168 | ANA |
| +005+ | 5.1 | Wilbur Wood | 218 | CHA |
| +006+ | 5.06 | Tom Seaver | 137.7 | NYN |
| +009+ | 4.59 | Wayne Twitchell | 114.7 | PHI |
| +011+ | 4.39 | Bert Blyleven | 158.7 | MIN |
| +012+ | 4.23 | Rick Reuschel | 132 | CHN |
| +013+ | 4.19 | Don Sutton | 157 | LAN |
| +014+ | 4 | Bill Lee | 138 | BOS |
| +017+ | 3.62 | Rollie Fingers | 64.7 | OAK |
| +018+ | 3.59 | Dave McNally | 141.7 | BAL |
| +019+ | 3.54 | Ron Bryant | 150.3 | SFN |
| +023+ | 3.05 | Jim Palmer | 135.3 | BAL |
| +027+ | 2.94 | Sonny Siebert | 79.3 | TOT |
| +030+ | 2.88 | Nolan Ryan | 165.3 | ANA |
| +033+ | 2.79 | Fred Beene | 60.3 | NYA |
| +036+ | 2.76 | Ross Grimsley | 125.3 | CIN |
| +041+ | 2.63 | Rick Wise | 134.7 | SLN |
| +045+ | 2.44 | Jerry Koosman | 131.7 | NYN |
| +047+ | 2.41 | Stan Bahnsen | 142 | CHA |
| +050+ | 2.24 | Jim Colborn | 147.7 | MIL |
| +052+ | 2.21 | Dave Roberts | 117 | HOU |
| +054+ | 2.19 | John Curtis | 119.7 | BOS |
| +056+ | 2.15 | Bob Gibson | 146 | SLN |
| +060+ | 2.1 | Doc Medich | 114.7 | NYA |
_