| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Palmer | BAL | 7.62 | 197309200_BAL_DET |
| Bert Blyleven | MIN | 7.36 | 197309180_MIN_KCA |
| Nolan Ryan | ANA | 5.1 | 197309191_ANA_TEX |
| Wayne Twitchell | PHI | 3.87 | 197309181_PHI_CHN |
| Steve Renko | WAS | 3.16 | 197309200_WAS_CHN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Milt Wilcox | CLE | -3.63 | 197309180_MIL_CLE |
| Steve Dunning | TEX | -3.32 | 197309202_ANA_TEX |
| Woodie Fryman | DET | -3.08 | 197309200_BAL_DET |
| Steve Arlin | SDN | -2.97 | 197309180_SDN_ATL |
| Johnny Odom | OAK | -0.66 | 197309201_OAK_MIN |
Based on accumulated WAA for this season up to 1973-09-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.49 | Tom Seaver | 273 | NYN |
| +002+ | 9.58 | Jim Palmer | 289.7 | BAL |
| +006+ | 8.32 | Bert Blyleven | 299 | MIN |
| +007+ | 7.61 | Don Sutton | 246.7 | LAN |
| +008+ | 7.41 | Nolan Ryan | 306 | ANA |
| +010+ | 6.6 | Steve Rogers | 116.7 | WAS |
| +012+ | 6.57 | Wayne Twitchell | 223.3 | PHI |
| +014+ | 6.25 | Ken Holtzman | 289 | OAK |
| +016+ | 6.11 | Bill Lee | 270.3 | BOS |
| +021+ | 5.42 | Steve Renko | 238 | WAS |
| +024+ | 5.34 | Andy Messersmith | 249.7 | LAN |
| +030+ | 4.63 | Bob Reynolds | 106.7 | BAL |
| +035+ | 4.39 | Dave Roberts | 227.3 | HOU |
| +037+ | 4.32 | Jack Billingham | 271.3 | CIN |
| +040+ | 4.18 | Rick Reuschel | 230 | CHN |
| +042+ | 4.11 | Nelson Briles | 212.3 | PIT |
| +044+ | 4.05 | Lindy McDaniel | 154 | NYA |
| +046+ | 4 | Bob Gibson | 189 | SLN |
| +047+ | 3.96 | Jim Colborn | 293.3 | MIL |
| +051+ | 3.82 | Jerry Koosman | 247.3 | NYN |
| +055+ | 3.59 | Mel Stottlemyre | 255 | NYA |
| +057+ | 3.48 | Wilbur Wood | 355 | CHA |
| +059+ | 3.48 | Bill Singer | 294.7 | ANA |
| +058+ | 3.48 | Doc Medich | 218.3 | NYA |
| +063+ | 3.36 | Dave McNally | 254.3 | BAL |
_