| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 14.84 | 197305240_ANA_CHA |
| Tom Seaver | NYN | 7.59 | 197305240_NYN_LAN |
| Don Sutton | LAN | 6.11 | 197305220_SDN_LAN |
| Dave McNally | BAL | 2.93 | 197305220_CLE_BAL |
| Joe Coleman | DET | 2.49 | 197305230_NYA_DET |
| 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 |
| Sam McDowell | SFN | -1.82 | 197305240_SFN_ATL |
| Bill Champion | MIL | -1.8 | 197305240_MIL_BOS |
Based on accumulated WAA for this season up to 1973-05-24.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.04 | Ken Holtzman | 96.7 | OAK |
| +002+ | 4.57 | Wilbur Wood | 117.7 | CHA |
| +004+ | 3.34 | Tom Seaver | 80.3 | NYN |
| +005+ | 3.14 | Bill Singer | 87.7 | ANA |
| +010+ | 2.6 | Rick Reuschel | 59 | CHN |
| +013+ | 2.32 | Jim Perry | 68.3 | DET |
| +015+ | 2.29 | Joe Coleman | 85.7 | DET |
| +016+ | 2.29 | Paul Splittorff | 79.3 | KCA |
| +017+ | 2.25 | Ron Bryant | 74.3 | SFN |
| +019+ | 2.14 | Bill Lee | 67 | BOS |
| +018+ | 2.14 | Jack Billingham | 86.3 | CIN |
| +020+ | 2.11 | Jim Palmer | 69 | BAL |
| +022+ | 2.06 | Don Sutton | 81 | LAN |
| +026+ | 1.87 | Nolan Ryan | 90 | ANA |
| +025+ | 1.87 | Doyle Alexander | 53.3 | BAL |
| +027+ | 1.82 | Gaylord Perry | 91.7 | CLE |
| +028+ | 1.8 | Mel Stottlemyre | 77 | NYA |
| +036+ | 1.69 | Jerry Reuss | 72.3 | HOU |
| +042+ | 1.62 | Bill Greif | 57.7 | SDN |
| +043+ | 1.62 | Dave McNally | 78.3 | BAL |
| +044+ | 1.58 | Rudy May | 59 | ANA |
| +045+ | 1.55 | Ross Grimsley | 66.7 | CIN |
| +047+ | 1.53 | Jim Colborn | 64.3 | MIL |
| +049+ | 1.45 | Rollie Fingers | 30.3 | OAK |
| +052+ | 1.42 | Carl Morton | 71.3 | ATL |
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