| Starter | Tm | Tier | Game |
|---|---|---|---|
| Nolan Ryan | ANA | 5.28 | 197309230_ANA_MIN |
| Steve Rogers | WAS | 4.46 | 197309250_WAS_NYN |
| Don Sutton | LAN | 3.81 | 197309250_LAN_ATL |
| Jack Billingham | CIN | 1.9 | 197309250_SDN_CIN |
| Nelson Briles | PIT | 1.83 | 197309242_PIT_WAS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Stoneman | WAS | -4.77 | 197309231_PIT_WAS |
| Milt Wilcox | CLE | -3.62 | 197309232_NYA_CLE |
| Steve Dunning | TEX | -3.13 | 197309250_TEX_ANA |
| Clay Kirby | SDN | -1.94 | 197309230_SDN_SFN |
| Steve Busby | KCA | -1.68 | 197309250_KCA_CHA |
Based on accumulated WAA for this season up to 1973-09-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.92 | Tom Seaver | 282 | NYN |
| +003+ | 9.65 | Jim Palmer | 289.7 | BAL |
| +006+ | 8.55 | Bert Blyleven | 308 | MIN |
| +007+ | 7.23 | Don Sutton | 256.3 | LAN |
| +009+ | 7.06 | Steve Rogers | 128.7 | WAS |
| +010+ | 6.8 | Nolan Ryan | 315 | ANA |
| +012+ | 6.61 | Wayne Twitchell | 223.3 | PHI |
| +014+ | 6.36 | Bill Lee | 276.7 | BOS |
| +020+ | 5.46 | Steve Renko | 244.7 | WAS |
| +022+ | 5.4 | Ken Holtzman | 290.3 | OAK |
| +023+ | 5.4 | Andy Messersmith | 249.7 | LAN |
| +031+ | 5.06 | Jack Billingham | 286.3 | CIN |
| +034+ | 4.74 | Nelson Briles | 218.7 | PIT |
| +035+ | 4.65 | Bob Reynolds | 109 | BAL |
| +038+ | 4.46 | Jerry Koosman | 254 | NYN |
| +040+ | 4.35 | Lindy McDaniel | 159.7 | NYA |
| +041+ | 4.22 | Dave Roberts | 234.3 | HOU |
| +042+ | 4.2 | Mel Stottlemyre | 264 | NYA |
| +047+ | 3.96 | Doc Medich | 226 | NYA |
| +049+ | 3.95 | Dave McNally | 260.3 | BAL |
| +058+ | 3.61 | Rick Reuschel | 230 | CHN |
| +059+ | 3.58 | Bill Singer | 304.7 | ANA |
| +064+ | 3.27 | Jim Rooker | 161.3 | PIT |
| +065+ | 3.26 | Jim Colborn | 297.3 | MIL |
| +072+ | 3.1 | George Stone | 148 | NYN |
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