| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 11.86 | 197308051_SLN_NYN |
| Jim Palmer | BAL | 5.89 | 197308040_BOS_BAL |
| Ken Holtzman | OAK | 5.71 | 197308040_OAK_ANA |
| Bert Blyleven | MIN | 5.08 | 197308050_KCA_MIN |
| Wayne Twitchell | PHI | 4.04 | 197308050_PIT_PHI |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Woodie Fryman | DET | -2.65 | 197308040_NYA_DET |
| Dick Bosman | CLE | -2.45 | 197308051_MIL_CLE |
| Jim Lonborg | PHI | -2.22 | 197308042_PIT_PHI |
| Mike Torrez | WAS | -1.59 | 197308050_CHN_WAS |
| Jim McAndrew | NYN | -1.32 | 197308052_SLN_NYN |
Based on accumulated WAA for this season up to 1973-08-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.2 | Tom Seaver | 194.7 | NYN |
| +002+ | 7.05 | Ken Holtzman | 224 | OAK |
| +005+ | 6.24 | Wayne Twitchell | 163.7 | PHI |
| +009+ | 5.46 | Don Sutton | 196 | LAN |
| +010+ | 5.4 | Bert Blyleven | 216 | MIN |
| +011+ | 5.24 | Rick Reuschel | 175.7 | CHN |
| +012+ | 5.04 | Jim Palmer | 196.7 | BAL |
| +018+ | 4.56 | Stan Bahnsen | 208.7 | CHA |
| +020+ | 4.41 | Bill Lee | 191.3 | BOS |
| +022+ | 4.12 | Nolan Ryan | 220.3 | ANA |
| +025+ | 3.96 | Bob Gibson | 189 | SLN |
| +026+ | 3.92 | Bill Singer | 210.7 | ANA |
| +027+ | 3.9 | Fred Beene | 80 | NYA |
| +031+ | 3.63 | Jim Colborn | 210.7 | MIL |
| +037+ | 3.28 | Dave McNally | 176 | BAL |
| +038+ | 3.26 | Wilbur Wood | 276.3 | CHA |
| +039+ | 3.24 | Rick Wise | 180.7 | SLN |
| +040+ | 3.24 | Dock Ellis | 155.3 | PIT |
| +042+ | 3.2 | Ross Grimsley | 168.7 | CIN |
| +047+ | 3.03 | Ron Bryant | 190 | SFN |
| +050+ | 2.97 | Steve Renko | 157.3 | WAS |
| +051+ | 2.95 | Sonny Siebert | 85.3 | TOT |
| +052+ | 2.94 | Dave Roberts | 165.7 | HOU |
| +053+ | 2.94 | Nelson Briles | 156.7 | PIT |
| +055+ | 2.84 | Tommy John | 141.3 | LAN |
_