| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Palmer | BAL | 6.71 | 197308120_BAL_KCA |
| Ken Holtzman | OAK | 6.19 | 197308120_OAK_NYA |
| Bert Blyleven | MIN | 5.95 | 197308130_DET_MIN |
| Bill Lee | BOS | 2.66 | 197308140_OAK_BOS |
| Jim Colborn | MIL | 2.05 | 197308120_MIN_MIL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Lonborg | PHI | -3.49 | 197308140_PHI_SFN |
| Johnny Odom | OAK | -2.55 | 197308130_OAK_BOS |
| Woodie Fryman | DET | -1.79 | 197308130_DET_MIN |
| Dave Goltz | MIN | -1.25 | 197308140_DET_MIN |
| Mike Torrez | WAS | -1.23 | 197308130_WAS_LAN |
Based on accumulated WAA for this season up to 1973-08-14.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.82 | Tom Seaver | 203.7 | NYN |
| +005+ | 6.43 | Wayne Twitchell | 172.7 | PHI |
| +006+ | 6.17 | Ken Holtzman | 234.3 | OAK |
| +007+ | 6.14 | Don Sutton | 203 | LAN |
| +010+ | 5.86 | Rick Reuschel | 189 | CHN |
| +012+ | 5.56 | Bert Blyleven | 231.7 | MIN |
| +013+ | 5.39 | Jim Palmer | 211.7 | BAL |
| +015+ | 5.08 | Bill Lee | 208.3 | BOS |
| +020+ | 4.51 | Nolan Ryan | 237.7 | ANA |
| +021+ | 4.5 | Fred Beene | 89 | NYA |
| +027+ | 4.16 | Ron Bryant | 205.7 | SFN |
| +028+ | 4.04 | Steve Renko | 173.7 | WAS |
| +029+ | 4.02 | Bob Gibson | 189 | SLN |
| +034+ | 3.77 | Terry Forster | 106.7 | CHA |
| +035+ | 3.76 | Nelson Briles | 173 | PIT |
| +036+ | 3.72 | Jim Colborn | 223.7 | MIL |
| +038+ | 3.68 | Andy Messersmith | 198.7 | LAN |
| +039+ | 3.58 | Don Wilson | 191.7 | HOU |
| +040+ | 3.47 | Dave Roberts | 180.7 | HOU |
| +043+ | 3.41 | Steve Rogers | 51 | WAS |
| +045+ | 3.34 | Dock Ellis | 163.3 | PIT |
| +049+ | 3.2 | Rogelio Moret | 89 | BOS |
| +051+ | 3.19 | Claude Osteen | 187.7 | LAN |
| +054+ | 3.05 | Ross Grimsley | 181 | CIN |
| +056+ | 3.01 | Rick Wise | 187 | SLN |
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