| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Palmer | BAL | 6.74 | 197309161_NYA_BAL |
| Bert Blyleven | MIN | 6.46 | 197309140_MIN_CHA |
| Nolan Ryan | ANA | 4.54 | 197309150_KCA_ANA |
| Steve Renko | WAS | 2.54 | 197309160_PHI_WAS |
| Nelson Briles | PIT | 2.05 | 197309140_PIT_SLN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Steve Blass | PIT | -14.9 | 197309160_PIT_SLN |
| Woodie Fryman | DET | -2.88 | 197309160_MIL_DET |
| Steve Dunning | TEX | -2.75 | 197309160_TEX_OAK |
| Jim Lonborg | PHI | -2.61 | 197309160_PHI_WAS |
| Dave Goltz | MIN | -1.88 | 197309160_MIN_CHA |
Based on accumulated WAA for this season up to 1973-09-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 12.29 | Tom Seaver | 270 | NYN |
| +004+ | 8.73 | Jim Palmer | 280.3 | BAL |
| +005+ | 8.4 | Bert Blyleven | 291 | MIN |
| +008+ | 7.27 | Don Sutton | 237.7 | LAN |
| +010+ | 6.87 | Nolan Ryan | 297 | ANA |
| +011+ | 6.61 | Steve Rogers | 109.7 | WAS |
| +013+ | 6.28 | Wayne Twitchell | 218 | PHI |
| +017+ | 5.72 | Steve Renko | 232 | WAS |
| +018+ | 5.71 | Bill Lee | 261.3 | BOS |
| +021+ | 5.64 | Ken Holtzman | 277 | OAK |
| +029+ | 4.87 | Andy Messersmith | 241.7 | LAN |
| +030+ | 4.77 | Rick Reuschel | 225 | CHN |
| +031+ | 4.77 | Bob Reynolds | 106 | BAL |
| +033+ | 4.52 | Nelson Briles | 207.3 | PIT |
| +035+ | 4.5 | Jack Billingham | 264.3 | CIN |
| +036+ | 4.43 | Dave McNally | 250 | BAL |
| +038+ | 4.26 | Jim Colborn | 285.3 | MIL |
| +043+ | 4.06 | Lindy McDaniel | 145 | NYA |
| +046+ | 3.99 | Dave Roberts | 218.3 | HOU |
| +047+ | 3.98 | Bob Gibson | 189 | SLN |
| +050+ | 3.85 | Terry Forster | 155 | CHA |
| +058+ | 3.56 | Doc Medich | 210.3 | NYA |
| +063+ | 3.46 | Stan Bahnsen | 271 | CHA |
| +064+ | 3.45 | Mel Stottlemyre | 247 | NYA |
| +065+ | 3.42 | George Stone | 140 | NYN |
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