| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 8.44 | 197307201_CHA_NYA |
| Tom Seaver | NYN | 8.11 | 197307180_NYN_ATL |
| Bert Blyleven | MIN | 6.79 | 197307200_MIN_BOS |
| Ken Holtzman | OAK | 5.49 | 197307180_BAL_OAK |
| Jim Palmer | BAL | 4.19 | 197307180_BAL_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Stoneman | WAS | -3.5 | 197307190_WAS_CIN |
| Steve Dunning | TEX | -3.01 | 197307190_MIL_TEX |
| Steve Busby | KCA | -1.01 | 197307180_KCA_DET |
| Joe Decker | MIN | -0.89 | 197307190_MIN_BOS |
| Clay Kirby | SDN | -0.55 | 197307180_SDN_CHN |
Based on accumulated WAA for this season up to 1973-07-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.42 | Ken Holtzman | 189 | OAK |
| +002+ | 6.33 | Tom Seaver | 160.7 | NYN |
| +006+ | 5.55 | Don Sutton | 175 | LAN |
| +007+ | 5.25 | Bill Lee | 163 | BOS |
| +009+ | 4.97 | Bert Blyleven | 191 | MIN |
| +010+ | 4.75 | Bill Singer | 193.3 | ANA |
| +012+ | 4.62 | Wayne Twitchell | 137.7 | PHI |
| +013+ | 4.44 | Rollie Fingers | 78.3 | OAK |
| +018+ | 4.16 | Dave McNally | 164.3 | BAL |
| +019+ | 4.13 | Wilbur Wood | 247.7 | CHA |
| +020+ | 4.05 | Rick Reuschel | 152 | CHN |
| +021+ | 4.01 | Nolan Ryan | 199.3 | ANA |
| +022+ | 3.9 | Ross Grimsley | 149.3 | CIN |
| +025+ | 3.6 | Mel Stottlemyre | 168.3 | NYA |
| +027+ | 3.44 | Jim Colborn | 174.7 | MIL |
| +034+ | 3.05 | Sonny Siebert | 79.3 | TOT |
| +033+ | 3.05 | Dave Roberts | 147 | HOU |
| +036+ | 3.04 | Fred Beene | 62.7 | NYA |
| +039+ | 3.01 | Nelson Briles | 136 | PIT |
| +046+ | 2.8 | Jim Palmer | 160.7 | BAL |
| +050+ | 2.7 | Steve Renko | 130 | WAS |
| +052+ | 2.66 | Stan Bahnsen | 169.7 | CHA |
| +053+ | 2.59 | Ron Bryant | 166.7 | SFN |
| +054+ | 2.56 | Lindy McDaniel | 92.7 | NYA |
| +062+ | 2.35 | Ken Brett | 97 | PHI |
_