| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 13.2 | 197308200_CIN_NYN |
| Don Sutton | LAN | 6.45 | 197308210_LAN_NYN |
| Bert Blyleven | MIN | 5.81 | 197308210_MIN_BAL |
| Jim Palmer | BAL | 5.61 | 197308210_MIN_BAL |
| Ken Holtzman | OAK | 4.75 | 197308210_DET_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Woodie Fryman | DET | -2.63 | 197308210_DET_OAK |
| Steve Dunning | TEX | -2.43 | 197308210_BOS_TEX |
| Steve Arlin | SDN | -2.03 | 197308220_SDN_PHI |
| Johnny Odom | OAK | -1.91 | 197308220_DET_OAK |
| Mike Torrez | WAS | -1.65 | 197308200_SFN_WAS |
Based on accumulated WAA for this season up to 1973-08-22.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.07 | Tom Seaver | 224.7 | NYN |
| +003+ | 6.97 | Don Sutton | 219.7 | LAN |
| +006+ | 6.73 | Bert Blyleven | 249 | MIN |
| +010+ | 6.16 | Ken Holtzman | 246.3 | OAK |
| +011+ | 6.08 | Jim Palmer | 227 | BAL |
| +012+ | 6.04 | Wayne Twitchell | 184.7 | PHI |
| +016+ | 5.16 | Bill Lee | 216.7 | BOS |
| +021+ | 4.94 | Rick Reuschel | 200.3 | CHN |
| +024+ | 4.67 | Ron Bryant | 221.3 | SFN |
| +025+ | 4.62 | Terry Forster | 123.7 | CHA |
| +026+ | 4.6 | Jim Colborn | 240.7 | MIL |
| +028+ | 4.5 | Fred Beene | 89 | NYA |
| +030+ | 4.43 | Steve Renko | 188 | WAS |
| +031+ | 4.11 | Nelson Briles | 179.3 | PIT |
| +032+ | 4.04 | Nolan Ryan | 252.3 | ANA |
| +033+ | 3.97 | Bob Gibson | 189 | SLN |
| +040+ | 3.7 | Andy Messersmith | 210.7 | LAN |
| +041+ | 3.66 | Steve Rogers | 66 | WAS |
| +045+ | 3.58 | Dock Ellis | 175.7 | PIT |
| +047+ | 3.49 | Dave Roberts | 181 | HOU |
| +048+ | 3.46 | Stan Bahnsen | 229 | CHA |
| +049+ | 3.41 | Claude Osteen | 194.7 | LAN |
| +050+ | 3.37 | Bill Singer | 237.3 | ANA |
| +052+ | 3.29 | Jack Billingham | 228.3 | CIN |
| +054+ | 3.26 | Ross Grimsley | 189 | CIN |
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