| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 10.75 | 197308011_PIT_NYN |
| Bert Blyleven | MIN | 6.1 | 197308010_MIN_OAK |
| Don Sutton | LAN | 5.83 | 197308020_LAN_HOU |
| Dave McNally | BAL | 3.89 | 197308031_BOS_BAL |
| Wilbur Wood | CHA | 3.8 | 197308010_KCA_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Steve Blass | PIT | -14.26 | 197308011_PIT_NYN |
| Bill Stoneman | WAS | -3.84 | 197308011_SLN_WAS |
| Dick Bosman | CLE | -2.17 | 197308010_BAL_CLE |
| Steve Busby | KCA | -1.23 | 197308010_KCA_CHA |
| Clay Kirby | SDN | -1.11 | 197308010_SFN_SDN |
Based on accumulated WAA for this season up to 1973-08-03.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.02 | Tom Seaver | 187.7 | NYN |
| +003+ | 6.84 | Ken Holtzman | 216.7 | OAK |
| +006+ | 6.18 | Wayne Twitchell | 155.7 | PHI |
| +009+ | 5.47 | Don Sutton | 196 | LAN |
| +010+ | 5.21 | Rick Reuschel | 175.7 | CHN |
| +012+ | 4.83 | Bert Blyleven | 207 | MIN |
| +017+ | 4.48 | Jim Palmer | 187.7 | BAL |
| +019+ | 4.34 | Stan Bahnsen | 203.7 | CHA |
| +020+ | 4.32 | Bill Lee | 183.3 | BOS |
| +021+ | 4.13 | Nolan Ryan | 220.3 | ANA |
| +023+ | 3.94 | Fred Beene | 80 | NYA |
| +025+ | 3.92 | Bill Singer | 210.7 | ANA |
| +027+ | 3.79 | Bob Gibson | 187 | SLN |
| +030+ | 3.66 | Jim Colborn | 201.7 | MIL |
| +032+ | 3.5 | Wilbur Wood | 269.3 | CHA |
| +036+ | 3.27 | Dave McNally | 176 | BAL |
| +038+ | 3.11 | Dave Roberts | 160.3 | HOU |
| +044+ | 2.97 | Steve Renko | 157.3 | WAS |
| +046+ | 2.94 | Sonny Siebert | 85.3 | TOT |
| +047+ | 2.93 | Nelson Briles | 156.7 | PIT |
| +051+ | 2.83 | Dock Ellis | 148.3 | PIT |
| +053+ | 2.77 | Ron Bryant | 181.7 | SFN |
| +058+ | 2.69 | Andy Messersmith | 182.7 | LAN |
| +059+ | 2.68 | Rick Wise | 171.7 | SLN |
| +060+ | 2.66 | Ross Grimsley | 159.7 | CIN |
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