| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 12.09 | 197308150_NYN_SDN |
| Don Sutton | LAN | 6.15 | 197308150_WAS_LAN |
| Jim Palmer | BAL | 5.73 | 197308170_CHA_BAL |
| Bert Blyleven | MIN | 5.25 | 197308170_MIN_CLE |
| Wayne Twitchell | PHI | 4.89 | 197308150_PHI_SFN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dick Bosman | CLE | -2.88 | 197308170_MIN_CLE |
| Woodie Fryman | DET | -1.64 | 197308170_DET_ANA |
| Steve Arlin | SDN | -1.58 | 197308150_NYN_SDN |
| Milt Pappas | CHN | -0.94 | 197308160_ATL_CHN |
| Ron Schueler | ATL | -0.4 | 197308170_ATL_WAS |
Based on accumulated WAA for this season up to 1973-08-17.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.59 | Tom Seaver | 212.7 | NYN |
| +004+ | 6.63 | Don Sutton | 211 | LAN |
| +007+ | 6.46 | Ken Holtzman | 242.3 | OAK |
| +008+ | 6.35 | Bert Blyleven | 240.7 | MIN |
| +012+ | 5.89 | Wayne Twitchell | 175.7 | PHI |
| +013+ | 5.7 | Jim Palmer | 220 | BAL |
| +016+ | 5.08 | Bill Lee | 208.3 | BOS |
| +019+ | 4.89 | Nolan Ryan | 246.7 | ANA |
| +021+ | 4.6 | Rick Reuschel | 191.3 | CHN |
| +023+ | 4.51 | Fred Beene | 89 | NYA |
| +026+ | 4.26 | Steve Renko | 180.7 | WAS |
| +027+ | 4.12 | Ron Bryant | 212.3 | SFN |
| +031+ | 3.97 | Bob Gibson | 189 | SLN |
| +032+ | 3.84 | Dock Ellis | 171.3 | PIT |
| +033+ | 3.81 | Jim Colborn | 231.7 | MIL |
| +034+ | 3.79 | Terry Forster | 106.7 | CHA |
| +035+ | 3.77 | Nelson Briles | 173 | PIT |
| +044+ | 3.48 | Dave Roberts | 180.7 | HOU |
| +046+ | 3.41 | Steve Rogers | 51 | WAS |
| +048+ | 3.22 | Claude Osteen | 187.7 | LAN |
| +051+ | 3.14 | Jack Billingham | 221 | CIN |
| +052+ | 3.11 | Rick Wise | 196 | SLN |
| +055+ | 3.08 | Andy Messersmith | 203.7 | LAN |
| +056+ | 3.05 | Ross Grimsley | 181 | CIN |
| +057+ | 3 | Bob Reynolds | 83.7 | BAL |
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