| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 9.17 | 197307171_CHA_BOS |
| Tom Seaver | NYN | 8.11 | 197307180_NYN_ATL |
| Don Sutton | LAN | 6.48 | 197307160_LAN_PIT |
| Ken Holtzman | OAK | 5.49 | 197307180_BAL_OAK |
| Dave McNally | BAL | 4.37 | 197307170_BAL_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Lonborg | PHI | -3.13 | 197307170_PHI_CIN |
| Milt Wilcox | CLE | -2.93 | 197307160_CLE_ANA |
| Steve Arlin | SDN | -1.36 | 197307170_SDN_CHN |
| Steve Busby | KCA | -1.01 | 197307180_KCA_DET |
| Milt Pappas | CHN | -0.68 | 197307170_SDN_CHN |
Based on accumulated WAA for this season up to 1973-07-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.42 | Ken Holtzman | 189 | OAK |
| +002+ | 6.32 | Tom Seaver | 160.7 | NYN |
| +005+ | 5.75 | Wilbur Wood | 243.3 | CHA |
| +006+ | 5.64 | Don Sutton | 175 | LAN |
| +008+ | 5.52 | Bert Blyleven | 185.3 | MIN |
| +009+ | 5.26 | Bill Lee | 163 | BOS |
| +011+ | 4.89 | Wayne Twitchell | 131 | PHI |
| +012+ | 4.65 | Bill Singer | 184.3 | ANA |
| +014+ | 4.44 | Rollie Fingers | 78.3 | OAK |
| +018+ | 4.26 | Rick Reuschel | 147 | CHN |
| +019+ | 4.18 | Dave McNally | 164.3 | BAL |
| +022+ | 3.63 | Ross Grimsley | 141.3 | CIN |
| +023+ | 3.58 | Nolan Ryan | 189 | ANA |
| +024+ | 3.56 | Mel Stottlemyre | 168.3 | NYA |
| +028+ | 3.43 | Jim Colborn | 174.7 | MIL |
| +032+ | 3.06 | Sonny Siebert | 79.3 | TOT |
| +034+ | 3.03 | Fred Beene | 62.7 | NYA |
| +033+ | 3.03 | Nelson Briles | 136 | PIT |
| +043+ | 2.81 | Jim Palmer | 160.7 | BAL |
| +046+ | 2.7 | Dave Roberts | 138 | HOU |
| +047+ | 2.68 | Steve Renko | 130 | WAS |
| +052+ | 2.59 | Ron Bryant | 166.7 | SFN |
| +053+ | 2.58 | Stan Bahnsen | 169.7 | CHA |
| +058+ | 2.46 | Bob Gibson | 161 | SLN |
| +062+ | 2.35 | Ken Brett | 97 | PHI |
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