| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 12.91 | 197308300_NYN_SLN |
| Bert Blyleven | MIN | 5.35 | 197308300_MIN_TEX |
| Wayne Twitchell | PHI | 4.05 | 197308280_SFN_PHI |
| Bill Lee | BOS | 3.71 | 197308290_BOS_OAK |
| Nelson Briles | PIT | 2.75 | 197308290_PIT_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dave Goltz | MIN | -1.9 | 197308290_MIN_DET |
| Dick Tidrow | CLE | -1.67 | 197308290_KCA_CLE |
| Steve Busby | KCA | -1.3 | 197308290_KCA_CLE |
| Mike Torrez | WAS | -1.27 | 197308290_LAN_WAS |
| Clay Kirby | SDN | -0.92 | 197308280_SDN_NYN |
Based on accumulated WAA for this season up to 1973-08-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.04 | Tom Seaver | 242 | NYN |
| +004+ | 7.12 | Don Sutton | 224.7 | LAN |
| +005+ | 7.09 | Bert Blyleven | 266.7 | MIN |
| +006+ | 6.98 | Wayne Twitchell | 201.7 | PHI |
| +008+ | 6.85 | Ken Holtzman | 255.3 | OAK |
| +011+ | 6.49 | Jim Palmer | 235 | BAL |
| +014+ | 5.52 | Bill Lee | 233.3 | BOS |
| +021+ | 5.06 | Rick Reuschel | 207.3 | CHN |
| +023+ | 4.89 | Terry Forster | 129.7 | CHA |
| +024+ | 4.84 | Nolan Ryan | 270 | ANA |
| +025+ | 4.83 | Jim Colborn | 255.7 | MIL |
| +031+ | 4.5 | Ron Bryant | 229.7 | SFN |
| +032+ | 4.5 | Fred Beene | 89 | NYA |
| +033+ | 4.41 | Steve Rogers | 75 | WAS |
| +035+ | 4.06 | Bill Singer | 246.3 | ANA |
| +036+ | 4.03 | Nelson Briles | 188.7 | PIT |
| +039+ | 3.9 | Dave Roberts | 197 | HOU |
| +040+ | 3.83 | Bob Gibson | 189 | SLN |
| +041+ | 3.81 | Claude Osteen | 212.7 | LAN |
| +042+ | 3.81 | Andy Messersmith | 217.7 | LAN |
| +046+ | 3.53 | Jack Billingham | 242.3 | CIN |
| +048+ | 3.51 | Tommy John | 178.7 | LAN |
| +049+ | 3.48 | Bob Reynolds | 89.7 | BAL |
| +052+ | 3.42 | Steve Renko | 201.3 | WAS |
| +061+ | 3.12 | Dave McNally | 215.3 | BAL |
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