| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Palmer | BAL | 9.02 | 197305210_BOS_BAL |
| Don Sutton | LAN | 6.11 | 197305220_SDN_LAN |
| Gaylord Perry | CLE | 5.84 | 197305210_NYA_CLE |
| Joe Coleman | DET | 2.49 | 197305230_NYA_DET |
| Don Wilson | HOU | 2.27 | 197305230_HOU_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wayne Simpson | KCA | -3.92 | 197305220_KCA_MIN |
| Mike Corkins | SDN | -2.1 | 197305230_SDN_LAN |
| Pete Broberg | TEX | -2.01 | 197305230_TEX_OAK |
| Woodie Fryman | DET | -0.78 | 197305220_NYA_DET |
| Steve Renko | WAS | -0.67 | 197305220_CHN_WAS |
Based on accumulated WAA for this season up to 1973-05-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.06 | Ken Holtzman | 96.7 | OAK |
| +002+ | 4.09 | Wilbur Wood | 109 | CHA |
| +004+ | 3.48 | Tom Seaver | 74.3 | NYN |
| +006+ | 3.14 | Bill Singer | 87.7 | ANA |
| +009+ | 2.62 | Rick Reuschel | 59 | CHN |
| +013+ | 2.34 | Jim Perry | 68.3 | DET |
| +014+ | 2.31 | Joe Coleman | 85.7 | DET |
| +015+ | 2.3 | Paul Splittorff | 79.3 | KCA |
| +016+ | 2.25 | Ron Bryant | 74.3 | SFN |
| +017+ | 2.22 | Don Sutton | 81 | LAN |
| +019+ | 2.16 | Jack Billingham | 86.3 | CIN |
| +020+ | 2.13 | Jim Palmer | 69 | BAL |
| +022+ | 2.04 | Nolan Ryan | 82 | ANA |
| +025+ | 1.89 | Doyle Alexander | 53.3 | BAL |
| +026+ | 1.85 | Gaylord Perry | 91.7 | CLE |
| +029+ | 1.81 | Mel Stottlemyre | 77 | NYA |
| +036+ | 1.71 | Jerry Reuss | 72.3 | HOU |
| +037+ | 1.64 | Dave McNally | 78.3 | BAL |
| +038+ | 1.64 | Bill Greif | 57.7 | SDN |
| +042+ | 1.6 | Bill Lee | 58 | BOS |
| +043+ | 1.58 | Rudy May | 59 | ANA |
| +044+ | 1.57 | Ross Grimsley | 66.7 | CIN |
| +046+ | 1.54 | Jerry Koosman | 63.7 | NYN |
| +047+ | 1.53 | Jim Colborn | 64.3 | MIL |
| +048+ | 1.46 | Rollie Fingers | 30.3 | OAK |
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