| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 12.09 | 197308150_NYN_SDN |
| Don Sutton | LAN | 6.15 | 197308150_WAS_LAN |
| Wayne Twitchell | PHI | 4.89 | 197308150_PHI_SFN |
| Rick Reuschel | CHN | 4.34 | 197308150_ATL_CHN |
| Bill Lee | BOS | 2.66 | 197308140_OAK_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Lonborg | PHI | -3.49 | 197308140_PHI_SFN |
| Steve Arlin | SDN | -1.58 | 197308150_NYN_SDN |
| Dave Goltz | MIN | -1.25 | 197308140_DET_MIN |
| Dick Tidrow | CLE | -1.13 | 197308160_CLE_KCA |
| Steve Busby | KCA | -0.97 | 197308140_CLE_KCA |
Based on accumulated WAA for this season up to 1973-08-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.6 | Tom Seaver | 212.7 | NYN |
| +004+ | 6.6 | Don Sutton | 211 | LAN |
| +007+ | 6.18 | Ken Holtzman | 234.3 | OAK |
| +009+ | 5.88 | Wayne Twitchell | 175.7 | PHI |
| +012+ | 5.56 | Bert Blyleven | 231.7 | MIN |
| +013+ | 5.4 | Jim Palmer | 211.7 | BAL |
| +016+ | 5.08 | Bill Lee | 208.3 | BOS |
| +019+ | 4.59 | Rick Reuschel | 191.3 | CHN |
| +020+ | 4.52 | Nolan Ryan | 237.7 | ANA |
| +022+ | 4.5 | Fred Beene | 89 | NYA |
| +027+ | 4.16 | Ron Bryant | 205.7 | SFN |
| +029+ | 4.06 | Steve Renko | 173.7 | WAS |
| +030+ | 4.03 | Bob Gibson | 189 | SLN |
| +033+ | 3.83 | Dock Ellis | 171.3 | PIT |
| +035+ | 3.78 | Terry Forster | 106.7 | CHA |
| +036+ | 3.77 | Nelson Briles | 173 | PIT |
| +037+ | 3.73 | Jim Colborn | 223.7 | MIL |
| +038+ | 3.69 | Andy Messersmith | 198.7 | LAN |
| +040+ | 3.58 | Don Wilson | 191.7 | HOU |
| +042+ | 3.47 | Dave Roberts | 180.7 | HOU |
| +044+ | 3.41 | Steve Rogers | 51 | WAS |
| +049+ | 3.2 | Rogelio Moret | 89 | BOS |
| +051+ | 3.2 | Claude Osteen | 187.7 | LAN |
| +053+ | 3.16 | Rick Wise | 196 | SLN |
| +054+ | 3.15 | Jack Billingham | 221 | CIN |
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