| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Palmer | BAL | 5.73 | 197308170_CHA_BAL |
| Bert Blyleven | MIN | 5.25 | 197308170_MIN_CLE |
| Ken Holtzman | OAK | 4.62 | 197308170_MIL_OAK |
| Wayne Twitchell | PHI | 3.84 | 197308190_PHI_HOU |
| Nolan Ryan | ANA | 3.41 | 197308170_DET_ANA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Lonborg | PHI | -3.2 | 197308180_PHI_HOU |
| Dick Bosman | CLE | -2.88 | 197308170_MIN_CLE |
| Johnny Odom | OAK | -2.02 | 197308180_MIL_OAK |
| Woodie Fryman | DET | -1.64 | 197308170_DET_ANA |
| Bill Parsons | MIL | -0.99 | 197308190_MIL_OAK |
Based on accumulated WAA for this season up to 1973-08-19.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 9.54 | Tom Seaver | 212.7 | NYN |
| +005+ | 6.61 | Don Sutton | 211 | LAN |
| +007+ | 6.39 | Ken Holtzman | 242.3 | OAK |
| +008+ | 6.33 | Bert Blyleven | 240.7 | MIN |
| +010+ | 6.01 | Wayne Twitchell | 184.7 | PHI |
| +013+ | 5.65 | Jim Palmer | 220 | BAL |
| +016+ | 5.12 | Bill Lee | 216.7 | BOS |
| +019+ | 4.91 | Rick Reuschel | 200.3 | CHN |
| +021+ | 4.78 | Nolan Ryan | 246.7 | ANA |
| +024+ | 4.48 | Fred Beene | 89 | NYA |
| +027+ | 4.21 | Steve Renko | 180.7 | WAS |
| +028+ | 4.1 | Ron Bryant | 212.3 | SFN |
| +029+ | 4.06 | Nelson Briles | 179.3 | PIT |
| +031+ | 3.92 | Bob Gibson | 189 | SLN |
| +035+ | 3.84 | Terry Forster | 114.7 | CHA |
| +036+ | 3.79 | Dock Ellis | 171.3 | PIT |
| +037+ | 3.78 | Jim Colborn | 231.7 | MIL |
| +041+ | 3.52 | Steve Rogers | 59.7 | WAS |
| +044+ | 3.46 | Dave Roberts | 181 | HOU |
| +048+ | 3.36 | Claude Osteen | 194.7 | LAN |
| +049+ | 3.3 | Ross Grimsley | 189 | CIN |
| +054+ | 3.12 | Jack Billingham | 221 | CIN |
| +057+ | 3.06 | Andy Messersmith | 203.7 | LAN |
| +056+ | 3.06 | Rick Wise | 196 | SLN |
| +060+ | 3.04 | Bill Singer | 229 | ANA |
_