| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 14.98 | 197309170_NYN_PIT |
| Bert Blyleven | MIN | 7.36 | 197309180_MIN_KCA |
| Jim Palmer | BAL | 6.74 | 197309161_NYA_BAL |
| Don Sutton | LAN | 4.87 | 197309170_SFN_LAN |
| 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 |
| Milt Wilcox | CLE | -3.63 | 197309180_MIL_CLE |
| Steve Arlin | SDN | -2.97 | 197309180_SDN_ATL |
| Woodie Fryman | DET | -2.88 | 197309160_MIL_DET |
Based on accumulated WAA for this season up to 1973-09-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.52 | Tom Seaver | 273 | NYN |
| +004+ | 8.72 | Jim Palmer | 280.3 | BAL |
| +006+ | 8.28 | Bert Blyleven | 299 | MIN |
| +007+ | 7.62 | Don Sutton | 246.7 | LAN |
| +009+ | 6.82 | Nolan Ryan | 297 | ANA |
| +011+ | 6.57 | Steve Rogers | 116.7 | WAS |
| +012+ | 6.55 | Wayne Twitchell | 223.3 | PHI |
| +015+ | 6.19 | Ken Holtzman | 289 | OAK |
| +016+ | 6.08 | Bill Lee | 270.3 | BOS |
| +019+ | 5.68 | Steve Renko | 232 | WAS |
| +029+ | 4.88 | Andy Messersmith | 241.7 | LAN |
| +030+ | 4.77 | Rick Reuschel | 225 | CHN |
| +031+ | 4.76 | Bob Reynolds | 106 | BAL |
| +033+ | 4.52 | Nelson Briles | 207.3 | PIT |
| +037+ | 4.42 | Dave McNally | 250 | BAL |
| +038+ | 4.36 | Dave Roberts | 227.3 | HOU |
| +040+ | 4.27 | Jack Billingham | 271.3 | CIN |
| +045+ | 4.02 | Lindy McDaniel | 154 | NYA |
| +049+ | 3.95 | Bob Gibson | 189 | SLN |
| +050+ | 3.92 | Jim Colborn | 293.3 | MIL |
| +052+ | 3.87 | Terry Forster | 155 | CHA |
| +060+ | 3.47 | Mel Stottlemyre | 247 | NYA |
| +062+ | 3.44 | Doc Medich | 218.3 | NYA |
| +063+ | 3.44 | George Stone | 140 | NYN |
| +064+ | 3.37 | Jerry Koosman | 239.3 | NYN |
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