| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 9.93 | 197307090_NYA_CHA |
| Tom Seaver | NYN | 8.2 | 197307090_HOU_NYN |
| Jim Palmer | BAL | 6.35 | 197307100_ANA_BAL |
| Bill Lee | BOS | 3.24 | 197307090_BOS_MIN |
| Bill Singer | ANA | 2.49 | 197307081_ANA_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Ron Reed | ATL | -2.46 | 197307090_ATL_PHI |
| Dick Bosman | CLE | -2.1 | 197307082_ANA_CLE |
| Johnny Odom | OAK | -1.87 | 197307100_OAK_CLE |
| Steve Dunning | TEX | -1.45 | 197307090_TEX_DET |
| Steve Busby | KCA | -1.38 | 197307100_KCA_MIL |
Based on accumulated WAA for this season up to 1973-07-10.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 6.53 | Ken Holtzman | 174.3 | OAK |
| +004+ | 5.45 | Tom Seaver | 144.7 | NYN |
| +005+ | 5.3 | Wilbur Wood | 227 | CHA |
| +006+ | 5.18 | Bill Singer | 177 | ANA |
| +008+ | 5.01 | Bert Blyleven | 167.7 | MIN |
| +009+ | 4.87 | Rick Reuschel | 141 | CHN |
| +010+ | 4.82 | Bill Lee | 147 | BOS |
| +013+ | 4.62 | Wayne Twitchell | 122 | PHI |
| +014+ | 4.22 | Don Sutton | 157 | LAN |
| +019+ | 3.49 | Dave McNally | 147.7 | BAL |
| +020+ | 3.46 | Rollie Fingers | 67.3 | OAK |
| +021+ | 3.45 | Nolan Ryan | 174 | ANA |
| +023+ | 3.36 | Ron Bryant | 157.3 | SFN |
| +027+ | 2.99 | Ross Grimsley | 132.3 | CIN |
| +028+ | 2.97 | Sonny Siebert | 79.3 | TOT |
| +033+ | 2.83 | Fred Beene | 60.3 | NYA |
| +043+ | 2.52 | Jim Palmer | 143.7 | BAL |
| +044+ | 2.47 | Steve Renko | 116.3 | WAS |
| +046+ | 2.45 | Jerry Koosman | 131.7 | NYN |
| +048+ | 2.41 | Doc Medich | 122 | NYA |
| +049+ | 2.4 | Mel Stottlemyre | 150.3 | NYA |
| +051+ | 2.38 | Stan Bahnsen | 158.3 | CHA |
| +050+ | 2.38 | John Curtis | 128.7 | BOS |
| +056+ | 2.32 | Rick Wise | 140 | SLN |
| +059+ | 2.21 | Bob Gibson | 146 | SLN |
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