| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 14.98 | 197309170_NYN_PIT |
| Jim Palmer | BAL | 6.74 | 197309161_NYA_BAL |
| Don Sutton | LAN | 4.87 | 197309170_SFN_LAN |
| Nolan Ryan | ANA | 4.54 | 197309150_KCA_ANA |
| Steve Rogers | WAS | 4.34 | 197309171_SLN_WAS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Steve Blass | PIT | -14.9 | 197309160_PIT_SLN |
| Bill Stoneman | WAS | -5.04 | 197309172_SLN_WAS |
| Woodie Fryman | DET | -2.88 | 197309160_MIL_DET |
| Steve Dunning | TEX | -2.75 | 197309160_TEX_OAK |
| Jim Lonborg | PHI | -2.61 | 197309160_PHI_WAS |
Based on accumulated WAA for this season up to 1973-09-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.53 | Tom Seaver | 273 | NYN |
| +004+ | 8.73 | Jim Palmer | 280.3 | BAL |
| +005+ | 8.42 | Bert Blyleven | 291 | MIN |
| +007+ | 7.62 | Don Sutton | 246.7 | LAN |
| +010+ | 6.81 | Nolan Ryan | 297 | ANA |
| +011+ | 6.58 | Steve Rogers | 116.7 | WAS |
| +013+ | 6.29 | Wayne Twitchell | 218 | PHI |
| +014+ | 6.2 | Ken Holtzman | 289 | OAK |
| +018+ | 5.72 | Bill Lee | 261.3 | BOS |
| +020+ | 5.69 | Steve Renko | 232 | WAS |
| +029+ | 4.89 | Andy Messersmith | 241.7 | LAN |
| +030+ | 4.78 | Rick Reuschel | 225 | CHN |
| +031+ | 4.77 | Bob Reynolds | 106 | BAL |
| +033+ | 4.53 | Nelson Briles | 207.3 | PIT |
| +036+ | 4.42 | Dave McNally | 250 | BAL |
| +037+ | 4.36 | Dave Roberts | 227.3 | HOU |
| +038+ | 4.28 | Jack Billingham | 271.3 | CIN |
| +039+ | 4.27 | Jim Colborn | 285.3 | MIL |
| +045+ | 4.02 | Lindy McDaniel | 154 | NYA |
| +047+ | 3.95 | Bob Gibson | 189 | SLN |
| +048+ | 3.87 | Terry Forster | 155 | CHA |
| +059+ | 3.57 | Doc Medich | 210.3 | NYA |
| +061+ | 3.49 | Stan Bahnsen | 271 | CHA |
| +062+ | 3.46 | Mel Stottlemyre | 247 | NYA |
| +064+ | 3.44 | George Stone | 140 | NYN |
_