| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 11.86 | 197308051_SLN_NYN |
| Don Sutton | LAN | 5.84 | 197308070_LAN_SDN |
| Bert Blyleven | MIN | 5.08 | 197308050_KCA_MIN |
| Wayne Twitchell | PHI | 4.04 | 197308050_PIT_PHI |
| Rick Reuschel | CHN | 3.22 | 197308070_CHN_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dick Bosman | CLE | -2.45 | 197308051_MIL_CLE |
| Mike Torrez | WAS | -1.59 | 197308050_CHN_WAS |
| Jim McAndrew | NYN | -1.32 | 197308052_SLN_NYN |
| Steve Arlin | SDN | -1.32 | 197308050_SDN_ATL |
| Steve Busby | KCA | -1.05 | 197308050_KCA_MIN |
Based on accumulated WAA for this season up to 1973-08-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.18 | Tom Seaver | 194.7 | NYN |
| +002+ | 7.05 | Ken Holtzman | 224 | OAK |
| +005+ | 6.22 | Wayne Twitchell | 163.7 | PHI |
| +007+ | 6.03 | Don Sutton | 203 | LAN |
| +010+ | 5.65 | Rick Reuschel | 182.7 | CHN |
| +011+ | 5.38 | Bert Blyleven | 216 | MIN |
| +012+ | 5.05 | Jim Palmer | 196.7 | BAL |
| +019+ | 4.49 | Stan Bahnsen | 208.7 | CHA |
| +020+ | 4.36 | Bill Lee | 191.3 | BOS |
| +024+ | 4.02 | Nolan Ryan | 229.3 | ANA |
| +025+ | 3.98 | Bob Gibson | 189 | SLN |
| +028+ | 3.89 | Fred Beene | 80 | NYA |
| +029+ | 3.88 | Bill Singer | 210.7 | ANA |
| +032+ | 3.59 | Jim Colborn | 210.7 | MIL |
| +034+ | 3.52 | Steve Renko | 166.3 | WAS |
| +037+ | 3.41 | Nelson Briles | 164.7 | PIT |
| +040+ | 3.26 | Rick Wise | 180.7 | SLN |
| +042+ | 3.22 | Dock Ellis | 155.3 | PIT |
| +044+ | 3.19 | Ross Grimsley | 168.7 | CIN |
| +045+ | 3.18 | Don Wilson | 183.3 | HOU |
| +048+ | 3.13 | Dave McNally | 181.7 | BAL |
| +051+ | 3.02 | Ron Bryant | 190 | SFN |
| +056+ | 2.92 | Dave Roberts | 165.7 | HOU |
| +058+ | 2.84 | Tommy John | 141.3 | LAN |
| +060+ | 2.74 | Sonny Siebert | 85.3 | TOT |
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