| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 18.28 | 197305100_CHA_ANA |
| Jim Palmer | BAL | 6.31 | 197305110_BAL_NYA |
| Bert Blyleven | MIN | 3.46 | 197305110_MIN_KCA |
| Joe Coleman | DET | 2.53 | 197305100_DET_KCA |
| Nolan Ryan | ANA | 1.78 | 197305110_CHA_ANA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Sam McDowell | SFN | -2.21 | 197305100_SLN_SFN |
| Reggie Cleveland | SLN | -1.98 | 197305090_SLN_SFN |
| Mike Corkins | SDN | -1.77 | 197305090_CHN_SDN |
| Carl Morton | ATL | -1.19 | 197305090_ATL_NYN |
| Brent Strom | CLE | -1.13 | 197305110_CLE_BOS |
Based on accumulated WAA for this season up to 1973-05-11.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.26 | Wilbur Wood | 84.3 | CHA |
| +002+ | 3.63 | Ken Holtzman | 69.7 | OAK |
| +004+ | 2.77 | Dave McNally | 67.3 | BAL |
| +006+ | 2.59 | Bill Singer | 61.7 | ANA |
| +007+ | 2.58 | Tom Seaver | 56.3 | NYN |
| +011+ | 2.32 | Ron Bryant | 61.3 | SFN |
| +010+ | 2.32 | Bill Greif | 37 | SDN |
| +013+ | 2.2 | Gaylord Perry | 67 | CLE |
| +015+ | 2.08 | Jerry Koosman | 50.3 | NYN |
| +019+ | 1.97 | Jim Perry | 49 | DET |
| +023+ | 1.72 | Don Sutton | 57.7 | LAN |
| +025+ | 1.7 | Jim Palmer | 51.7 | BAL |
| +026+ | 1.66 | Ross Grimsley | 50.3 | CIN |
| +027+ | 1.64 | Rick Reuschel | 42.3 | CHN |
| +030+ | 1.57 | Jerry Reuss | 50.7 | HOU |
| +034+ | 1.4 | Al Downing | 43.3 | LAN |
| +033+ | 1.4 | Bruce DalCanton | 37 | KCA |
| +037+ | 1.33 | Joe Coleman | 59 | DET |
| +041+ | 1.31 | Rudy May | 36 | ANA |
| +043+ | 1.26 | Rogelio Moret | 14.7 | BOS |
| XXXXX | 1.22 | Jim Colborn | 39.3 | MIL |
| XXXXX | 1.18 | Jack Billingham | 59.7 | CIN |
| XXXXX | 1.12 | Roger Nelson | 33.7 | CIN |
| XXXXX | 1.09 | Juan Marichal | 54 | SFN |
| XXXXX | 1.08 | Rollie Fingers | 23.3 | OAK |
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