| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 12.91 | 197308300_NYN_SLN |
| Jim Palmer | BAL | 5.64 | 197308310_BAL_NYA |
| Bert Blyleven | MIN | 5.35 | 197308300_MIN_TEX |
| Ken Holtzman | OAK | 5.1 | 197308310_OAK_KCA |
| Bill Lee | BOS | 3.71 | 197308290_BOS_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Lonborg | PHI | -2.87 | 197308310_WAS_PHI |
| Mike Kekich | CLE | -1.93 | 197308310_CLE_DET |
| Dave Goltz | MIN | -1.9 | 197308290_MIN_DET |
| Bill Parsons | MIL | -1.35 | 197308312_BOS_MIL |
| Steve Busby | KCA | -1.3 | 197308290_KCA_CLE |
Based on accumulated WAA for this season up to 1973-08-31.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.05 | Tom Seaver | 242 | NYN |
| +004+ | 7.15 | Don Sutton | 224.7 | LAN |
| +006+ | 7.12 | Bert Blyleven | 266.7 | MIN |
| +007+ | 7 | Wayne Twitchell | 201.7 | PHI |
| +011+ | 6.11 | Jim Palmer | 242.3 | BAL |
| +013+ | 5.84 | Ken Holtzman | 258 | OAK |
| +015+ | 5.5 | Bill Lee | 233.3 | BOS |
| +023+ | 4.91 | Steve Rogers | 83 | WAS |
| +024+ | 4.9 | Terry Forster | 129.7 | CHA |
| +025+ | 4.89 | Nolan Ryan | 270 | ANA |
| +027+ | 4.82 | Rick Reuschel | 211.3 | CHN |
| +028+ | 4.78 | Jim Colborn | 255.7 | MIL |
| +032+ | 4.51 | Fred Beene | 89 | NYA |
| +034+ | 4.04 | Nelson Briles | 188.7 | PIT |
| +037+ | 3.92 | Dave Roberts | 197 | HOU |
| +039+ | 3.84 | Claude Osteen | 212.7 | LAN |
| +038+ | 3.84 | Bob Gibson | 189 | SLN |
| +040+ | 3.83 | Andy Messersmith | 217.7 | LAN |
| +042+ | 3.65 | Ron Bryant | 231.7 | SFN |
| +043+ | 3.63 | Bill Singer | 253 | ANA |
| +046+ | 3.56 | Jack Billingham | 242.3 | CIN |
| +048+ | 3.53 | Tommy John | 178.7 | LAN |
| +050+ | 3.5 | Bob Reynolds | 89.7 | BAL |
| +052+ | 3.44 | Steve Renko | 201.3 | WAS |
| +060+ | 3.17 | Mel Stottlemyre | 228.3 | NYA |
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