| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 8.44 | 197307201_CHA_NYA |
| Don Sutton | LAN | 7.2 | 197307210_LAN_SLN |
| Bert Blyleven | MIN | 6.79 | 197307200_MIN_BOS |
| Dave McNally | BAL | 4.59 | 197307210_BAL_ANA |
| Nolan Ryan | ANA | 2.62 | 197307190_BAL_ANA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Stoneman | WAS | -3.5 | 197307190_WAS_CIN |
| Milt Wilcox | CLE | -3.09 | 197307210_CLE_OAK |
| Steve Dunning | TEX | -3.01 | 197307190_MIL_TEX |
| Marty Pattin | BOS | -1.03 | 197307210_MIN_BOS |
| Joe Decker | MIN | -0.89 | 197307190_MIN_BOS |
Based on accumulated WAA for this season up to 1973-07-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.42 | Ken Holtzman | 189 | OAK |
| +002+ | 6.33 | Tom Seaver | 160.7 | NYN |
| +006+ | 5.25 | Bill Lee | 163 | BOS |
| +008+ | 4.99 | Bert Blyleven | 191 | MIN |
| +010+ | 4.81 | Don Sutton | 181 | LAN |
| +011+ | 4.75 | Bill Singer | 193.3 | ANA |
| +013+ | 4.62 | Wayne Twitchell | 137.7 | PHI |
| +014+ | 4.44 | Rollie Fingers | 78.3 | OAK |
| +017+ | 4.22 | Dave McNally | 172.3 | BAL |
| +019+ | 4.14 | Wilbur Wood | 247.7 | CHA |
| +020+ | 4.06 | Rick Reuschel | 152 | CHN |
| +021+ | 4.01 | Nolan Ryan | 199.3 | ANA |
| +022+ | 3.9 | Ross Grimsley | 149.3 | CIN |
| +024+ | 3.61 | Mel Stottlemyre | 168.3 | NYA |
| +026+ | 3.47 | Jim Colborn | 174.7 | MIL |
| +034+ | 3.05 | Sonny Siebert | 79.3 | TOT |
| +033+ | 3.05 | Dave Roberts | 147 | HOU |
| +036+ | 3.04 | Fred Beene | 62.7 | NYA |
| +038+ | 3.02 | Nelson Briles | 136 | PIT |
| +043+ | 2.92 | Bob Gibson | 170 | SLN |
| +047+ | 2.8 | Jim Palmer | 160.7 | BAL |
| +051+ | 2.66 | Stan Bahnsen | 169.7 | CHA |
| +054+ | 2.59 | Ron Bryant | 166.7 | SFN |
| +055+ | 2.56 | Lindy McDaniel | 92.7 | NYA |
| +061+ | 2.33 | Jack Billingham | 170 | CIN |
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