| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Palmer | BAL | 8.65 | 197305290_BAL_KCA |
| Tom Seaver | NYN | 6.73 | 197305290_NYN_SFN |
| Gaylord Perry | CLE | 5.58 | 197305300_CLE_TEX |
| Jim Hunter | OAK | 2.9 | 197305290_OAK_NYA |
| Bert Blyleven | MIN | 2.79 | 197305290_MIN_MIL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wayne Simpson | KCA | -4.13 | 197305300_BAL_KCA |
| Pete Broberg | TEX | -2.63 | 197305300_CLE_TEX |
| Ron Reed | ATL | -1.78 | 197305300_ATL_PIT |
| Brent Strom | CLE | -1.67 | 197305310_CLE_TEX |
| Jerry Reuss | HOU | -0.9 | 197305290_HOU_CHN |
Based on accumulated WAA for this season up to 1973-05-31.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.42 | Wilbur Wood | 131.7 | CHA |
| +002+ | 5.1 | Ken Holtzman | 109.7 | OAK |
| +005+ | 3.79 | Tom Seaver | 89.3 | NYN |
| +006+ | 3.37 | Rick Reuschel | 73 | CHN |
| +009+ | 3.12 | Bill Singer | 96.7 | ANA |
| +013+ | 2.61 | Don Sutton | 90 | LAN |
| +014+ | 2.6 | Bill Lee | 74.7 | BOS |
| +015+ | 2.6 | Jim Perry | 79.7 | DET |
| +016+ | 2.52 | Jim Palmer | 78 | BAL |
| +019+ | 2.4 | Jim Colborn | 82.3 | MIL |
| +020+ | 2.38 | Ron Bryant | 83.3 | SFN |
| +021+ | 2.37 | Gaylord Perry | 113 | CLE |
| +025+ | 2.24 | Paul Splittorff | 96.3 | KCA |
| +027+ | 2.2 | Joe Coleman | 92.7 | DET |
| +028+ | 2.19 | Nolan Ryan | 98 | ANA |
| +029+ | 2.09 | Bill Greif | 65.7 | SDN |
| +033+ | 1.96 | Gene Garber | 50.7 | KCA |
| +035+ | 1.87 | Ross Grimsley | 80 | CIN |
| +036+ | 1.85 | Dave McNally | 85 | BAL |
| +038+ | 1.82 | Alan Foster | 46.3 | SLN |
| +041+ | 1.7 | Rollie Fingers | 35.7 | OAK |
| +044+ | 1.62 | Jerry Koosman | 70.7 | NYN |
| +047+ | 1.55 | Jack Billingham | 91.3 | CIN |
| +049+ | 1.5 | Bert Blyleven | 91.3 | MIN |
| +052+ | 1.49 | Roric Harrison | 34 | ATL |
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