| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 12.69 | 197309210_PIT_NYN |
| Bert Blyleven | MIN | 6.56 | 197309220_ANA_MIN |
| Nolan Ryan | ANA | 5.28 | 197309230_ANA_MIN |
| Don Sutton | LAN | 5.07 | 197309220_CIN_LAN |
| Steve Rogers | WAS | 4.14 | 197309210_WAS_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Steve Blass | PIT | -14.34 | 197309210_PIT_NYN |
| Bill Stoneman | WAS | -4.77 | 197309231_PIT_WAS |
| Milt Wilcox | CLE | -3.62 | 197309232_NYA_CLE |
| Steve Arlin | SDN | -2.91 | 197309220_SDN_SFN |
| Jim Lonborg | PHI | -1.81 | 197309210_SLN_PHI |
Based on accumulated WAA for this season up to 1973-09-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.93 | Tom Seaver | 282 | NYN |
| +003+ | 9.66 | Jim Palmer | 289.7 | BAL |
| +006+ | 8.56 | Bert Blyleven | 308 | MIN |
| +008+ | 6.96 | Steve Rogers | 122.7 | WAS |
| +009+ | 6.83 | Nolan Ryan | 315 | ANA |
| +011+ | 6.62 | Wayne Twitchell | 223.3 | PHI |
| +013+ | 6.47 | Don Sutton | 247.3 | LAN |
| +014+ | 6.38 | Bill Lee | 276.7 | BOS |
| +020+ | 5.5 | Steve Renko | 238 | WAS |
| +022+ | 5.42 | Ken Holtzman | 290.3 | OAK |
| +023+ | 5.41 | Andy Messersmith | 249.7 | LAN |
| +032+ | 4.71 | Jack Billingham | 277.3 | CIN |
| +033+ | 4.65 | Bob Reynolds | 109 | BAL |
| +037+ | 4.27 | Mel Stottlemyre | 264 | NYA |
| +038+ | 4.23 | Dave Roberts | 234.3 | HOU |
| +039+ | 4.22 | Lindy McDaniel | 155.3 | NYA |
| +040+ | 4.18 | Nelson Briles | 212.3 | PIT |
| +044+ | 4.02 | Doc Medich | 226 | NYA |
| +047+ | 3.96 | Dave McNally | 260.3 | BAL |
| +049+ | 3.9 | Jerry Koosman | 247.3 | NYN |
| +057+ | 3.62 | Rick Reuschel | 230 | CHN |
| +059+ | 3.58 | Bill Singer | 294.7 | ANA |
| +061+ | 3.34 | Jim Colborn | 297.3 | MIL |
| +067+ | 3.18 | Terry Forster | 161.3 | CHA |
| +070+ | 3.1 | George Stone | 148 | NYN |
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