| Starter | Tm | Tier | Game |
|---|---|---|---|
| Don Sutton | LAN | 5.97 | 197308260_LAN_PHI |
| Bert Blyleven | MIN | 5.85 | 197308260_MIL_MIN |
| Jim Palmer | BAL | 5.59 | 197308260_KCA_BAL |
| Ken Holtzman | OAK | 4.19 | 197308260_NYA_OAK |
| Wayne Twitchell | PHI | 4.05 | 197308280_SFN_PHI |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Milt Wilcox | CLE | -3.49 | 197308262_TEX_CLE |
| Jim Lonborg | PHI | -2.99 | 197308270_SFN_PHI |
| Woodie Fryman | DET | -2.71 | 197308262_DET_CHA |
| Steve Arlin | SDN | -1.76 | 197308270_SDN_NYN |
| Johnny Odom | OAK | -1.55 | 197308270_BOS_OAK |
Based on accumulated WAA for this season up to 1973-08-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.49 | Tom Seaver | 232.7 | NYN |
| +003+ | 7.12 | Don Sutton | 224.7 | LAN |
| +005+ | 7.01 | Wayne Twitchell | 201.7 | PHI |
| +007+ | 6.88 | Ken Holtzman | 255.3 | OAK |
| +009+ | 6.7 | Bert Blyleven | 256.7 | MIN |
| +011+ | 6.51 | Jim Palmer | 235 | BAL |
| +014+ | 5.71 | Bill Lee | 225.7 | BOS |
| +019+ | 5.07 | Rick Reuschel | 207.3 | CHN |
| +022+ | 4.9 | Terry Forster | 129.7 | CHA |
| +027+ | 4.58 | Nelson Briles | 185.3 | PIT |
| +029+ | 4.53 | Ron Bryant | 229.7 | SFN |
| +030+ | 4.5 | Fred Beene | 89 | NYA |
| +032+ | 4.42 | Steve Rogers | 75 | WAS |
| +033+ | 4.29 | Steve Renko | 196.7 | WAS |
| +034+ | 4.1 | Nolan Ryan | 261 | ANA |
| +035+ | 4.09 | Bill Singer | 246.3 | ANA |
| +036+ | 4.08 | Jim Colborn | 246.7 | MIL |
| +037+ | 3.86 | Bob Gibson | 189 | SLN |
| +039+ | 3.82 | Claude Osteen | 212.7 | LAN |
| +040+ | 3.81 | Andy Messersmith | 217.7 | LAN |
| +043+ | 3.66 | Tommy John | 170.3 | LAN |
| +046+ | 3.49 | Bob Reynolds | 89.7 | BAL |
| +050+ | 3.35 | Stan Bahnsen | 235.7 | CHA |
| +051+ | 3.34 | Dave Roberts | 188 | HOU |
| +056+ | 3.21 | Jack Billingham | 233.3 | CIN |
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