| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 15.8 | 197305280_CLE_CHA |
| Don Sutton | LAN | 6.06 | 197305270_NYN_LAN |
| Gaylord Perry | CLE | 5.14 | 197305260_CLE_CHA |
| Ken Holtzman | OAK | 2.61 | 197305260_OAK_DET |
| Don Wilson | HOU | 2.18 | 197305280_HOU_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Johnny Odom | OAK | -2.36 | 197305280_OAK_DET |
| Mike Corkins | SDN | -1.84 | 197305280_WAS_SDN |
| Reggie Cleveland | SLN | -1.49 | 197305270_ATL_SLN |
| Woodie Fryman | DET | -1.19 | 197305260_OAK_DET |
| Milt Pappas | CHN | -0.8 | 197305260_CHN_CIN |
Based on accumulated WAA for this season up to 1973-05-28.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.44 | Wilbur Wood | 131.7 | CHA |
| +002+ | 4.48 | Ken Holtzman | 102.3 | OAK |
| +005+ | 3.47 | Tom Seaver | 80.3 | NYN |
| +007+ | 3.21 | Jim Perry | 79.3 | DET |
| +008+ | 3.12 | Bill Singer | 96.7 | ANA |
| +009+ | 2.85 | Rick Reuschel | 64 | CHN |
| +012+ | 2.62 | Don Sutton | 90 | LAN |
| +017+ | 2.4 | Ron Bryant | 83.3 | SFN |
| +019+ | 2.31 | Gaylord Perry | 104.7 | CLE |
| +018+ | 2.31 | Jim Colborn | 73.3 | MIL |
| +022+ | 2.21 | Joe Coleman | 92.7 | DET |
| +023+ | 2.2 | Jim Palmer | 69 | BAL |
| +024+ | 2.19 | Bill Lee | 67 | BOS |
| +026+ | 2.14 | Paul Splittorff | 87.3 | KCA |
| +027+ | 2.11 | Bill Greif | 65.7 | SDN |
| +028+ | 2.08 | Jerry Reuss | 81.3 | HOU |
| +030+ | 1.92 | Nolan Ryan | 90 | ANA |
| +032+ | 1.86 | Mel Stottlemyre | 82.3 | NYA |
| +037+ | 1.72 | Dave McNally | 78.3 | BAL |
| +039+ | 1.66 | Alan Foster | 39.3 | SLN |
| +040+ | 1.64 | Stan Bahnsen | 90 | CHA |
| +042+ | 1.62 | Jerry Koosman | 70.7 | NYN |
| +047+ | 1.56 | Rollie Fingers | 34 | OAK |
| +049+ | 1.55 | Jack Billingham | 91.3 | CIN |
| +048+ | 1.55 | Carl Morton | 71.3 | ATL |
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