| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 14.98 | 197309170_NYN_PIT |
| Bert Blyleven | MIN | 7.36 | 197309180_MIN_KCA |
| Nolan Ryan | ANA | 5.1 | 197309191_ANA_TEX |
| Don Sutton | LAN | 4.87 | 197309170_SFN_LAN |
| Steve Rogers | WAS | 4.34 | 197309171_SLN_WAS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Stoneman | WAS | -5.04 | 197309172_SLN_WAS |
| Milt Wilcox | CLE | -3.63 | 197309180_MIL_CLE |
| Steve Arlin | SDN | -2.97 | 197309180_SDN_ATL |
| Pete Broberg | TEX | -2.06 | 197309191_ANA_TEX |
| Steve Busby | KCA | -1.54 | 197309170_MIN_KCA |
Based on accumulated WAA for this season up to 1973-09-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.54 | Tom Seaver | 273 | NYN |
| +004+ | 8.76 | Jim Palmer | 280.3 | BAL |
| +006+ | 8.3 | Bert Blyleven | 299 | MIN |
| +007+ | 7.64 | Don Sutton | 246.7 | LAN |
| +008+ | 7.41 | Nolan Ryan | 306 | ANA |
| +011+ | 6.59 | Steve Rogers | 116.7 | WAS |
| +012+ | 6.56 | Wayne Twitchell | 223.3 | PHI |
| +015+ | 6.21 | Ken Holtzman | 289 | OAK |
| +016+ | 6.1 | Bill Lee | 270.3 | BOS |
| +021+ | 5.71 | Steve Renko | 232 | WAS |
| +023+ | 5.37 | Andy Messersmith | 249.7 | LAN |
| +030+ | 4.63 | Bob Reynolds | 106.7 | BAL |
| +034+ | 4.38 | Dave Roberts | 227.3 | HOU |
| +036+ | 4.29 | Jack Billingham | 271.3 | CIN |
| +039+ | 4.17 | Rick Reuschel | 230 | CHN |
| +041+ | 4.14 | Nelson Briles | 212.3 | PIT |
| +043+ | 4.04 | Lindy McDaniel | 154 | NYA |
| +045+ | 3.97 | Bob Gibson | 189 | SLN |
| +046+ | 3.94 | Jim Colborn | 293.3 | MIL |
| +052+ | 3.85 | Terry Forster | 155 | CHA |
| +054+ | 3.58 | Mel Stottlemyre | 255 | NYA |
| +058+ | 3.47 | Doc Medich | 218.3 | NYA |
| +059+ | 3.44 | Wilbur Wood | 355 | CHA |
| +061+ | 3.39 | Ross Grimsley | 231.7 | CIN |
| +060+ | 3.39 | Jerry Koosman | 239.3 | NYN |
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