| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 10.94 | 197308100_NYN_SFN |
| Jim Palmer | BAL | 6.12 | 197308080_BAL_MIN |
| Ken Holtzman | OAK | 5.95 | 197308080_OAK_DET |
| Bert Blyleven | MIN | 5.56 | 197308090_BAL_MIN |
| Wayne Twitchell | PHI | 4.27 | 197308100_PHI_LAN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Lonborg | PHI | -2.85 | 197308090_PHI_SDN |
| Woodie Fryman | DET | -2.28 | 197308080_OAK_DET |
| Steve Arlin | SDN | -1.76 | 197308100_WAS_SDN |
| Dick Tidrow | CLE | -1.62 | 197308080_CLE_CHA |
| Mike Torrez | WAS | -1.38 | 197308090_WAS_SFN |
Based on accumulated WAA for this season up to 1973-08-10.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.75 | Tom Seaver | 203.7 | NYN |
| +003+ | 7.07 | Ken Holtzman | 231.3 | OAK |
| +005+ | 6.36 | Wayne Twitchell | 172.7 | PHI |
| +008+ | 6.03 | Don Sutton | 203 | LAN |
| +010+ | 5.73 | Bert Blyleven | 225 | MIN |
| +011+ | 5.65 | Rick Reuschel | 182.7 | CHN |
| +012+ | 5.61 | Jim Palmer | 205.7 | BAL |
| +019+ | 4.46 | Fred Beene | 89 | NYA |
| +020+ | 4.42 | Bill Lee | 199.3 | BOS |
| +025+ | 4.03 | Nolan Ryan | 229.3 | ANA |
| +026+ | 3.96 | Bob Gibson | 189 | SLN |
| +027+ | 3.93 | Jim Colborn | 219.7 | MIL |
| +033+ | 3.53 | Steve Renko | 166.3 | WAS |
| +037+ | 3.39 | Nelson Briles | 164.7 | PIT |
| +038+ | 3.36 | Ron Bryant | 196.7 | SFN |
| +039+ | 3.35 | Terry Forster | 97.7 | CHA |
| +041+ | 3.35 | Claude Osteen | 180.7 | LAN |
| +042+ | 3.3 | Bill Singer | 216 | ANA |
| +043+ | 3.27 | Dock Ellis | 163.3 | PIT |
| +044+ | 3.26 | Stan Bahnsen | 209 | CHA |
| +046+ | 3.18 | Don Wilson | 183.3 | HOU |
| +047+ | 3.14 | Dave McNally | 181.7 | BAL |
| +049+ | 3.13 | Andy Messersmith | 190.7 | LAN |
| +050+ | 3.06 | Ross Grimsley | 174.7 | CIN |
| +057+ | 2.95 | Rick Wise | 187 | SLN |
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