| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 9.17 | 197307171_CHA_BOS |
| Tom Seaver | NYN | 8.11 | 197307180_NYN_ATL |
| Ken Holtzman | OAK | 5.49 | 197307180_BAL_OAK |
| Dave McNally | BAL | 4.37 | 197307170_BAL_OAK |
| Bill Lee | BOS | 3.45 | 197307180_CHA_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bill Stoneman | WAS | -3.5 | 197307190_WAS_CIN |
| Jim Lonborg | PHI | -3.13 | 197307170_PHI_CIN |
| Steve Dunning | TEX | -3.01 | 197307190_MIL_TEX |
| Dick Bosman | CLE | -1.43 | 197307170_CLE_ANA |
| Steve Arlin | SDN | -1.36 | 197307170_SDN_CHN |
Based on accumulated WAA for this season up to 1973-07-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.41 | Ken Holtzman | 189 | OAK |
| +002+ | 6.3 | Tom Seaver | 160.7 | NYN |
| +005+ | 5.73 | Wilbur Wood | 243.3 | CHA |
| +006+ | 5.63 | Don Sutton | 175 | LAN |
| +008+ | 5.5 | Bert Blyleven | 185.3 | MIN |
| +009+ | 5.24 | Bill Lee | 163 | BOS |
| +011+ | 4.87 | Wayne Twitchell | 131 | PHI |
| +012+ | 4.59 | Bill Singer | 184.3 | ANA |
| +014+ | 4.44 | Rollie Fingers | 78.3 | OAK |
| +018+ | 4.24 | Rick Reuschel | 147 | CHN |
| +019+ | 4.13 | Dave McNally | 164.3 | BAL |
| +021+ | 4 | Nolan Ryan | 199.3 | ANA |
| +022+ | 3.89 | Ross Grimsley | 149.3 | CIN |
| +025+ | 3.55 | Mel Stottlemyre | 168.3 | NYA |
| +027+ | 3.41 | Jim Colborn | 174.7 | MIL |
| +033+ | 3.04 | Sonny Siebert | 79.3 | TOT |
| +035+ | 3.02 | Fred Beene | 62.7 | NYA |
| +036+ | 3.02 | Nelson Briles | 136 | PIT |
| +045+ | 2.77 | Jim Palmer | 160.7 | BAL |
| +048+ | 2.68 | Dave Roberts | 138 | HOU |
| +049+ | 2.68 | Steve Renko | 130 | WAS |
| +052+ | 2.58 | Ron Bryant | 166.7 | SFN |
| +053+ | 2.57 | Stan Bahnsen | 169.7 | CHA |
| +059+ | 2.44 | Bob Gibson | 161 | SLN |
| +064+ | 2.34 | Ken Brett | 97 | PHI |
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