| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 14.84 | 197305240_ANA_CHA |
| Tom Seaver | NYN | 7.59 | 197305240_NYN_LAN |
| Joe Coleman | DET | 2.49 | 197305230_NYA_DET |
| Don Wilson | HOU | 2.27 | 197305230_HOU_CIN |
| Jim Hunter | OAK | 2.16 | 197305250_OAK_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rich Gossage | CHA | -2.18 | 197305250_CLE_CHA |
| Ron Reed | ATL | -2.1 | 197305250_ATL_SLN |
| Mike Corkins | SDN | -2.1 | 197305230_SDN_LAN |
| Pete Broberg | TEX | -2.01 | 197305230_TEX_OAK |
| Sam McDowell | SFN | -1.82 | 197305240_SFN_ATL |
Based on accumulated WAA for this season up to 1973-05-25.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.99 | Ken Holtzman | 96.7 | OAK |
| +002+ | 4.59 | Wilbur Wood | 117.7 | CHA |
| +004+ | 3.38 | Tom Seaver | 80.3 | NYN |
| +005+ | 3.18 | Jim Perry | 79.3 | DET |
| +006+ | 3.15 | Bill Singer | 87.7 | ANA |
| +009+ | 2.82 | Rick Reuschel | 64 | CHN |
| +015+ | 2.25 | Ron Bryant | 74.3 | SFN |
| +016+ | 2.23 | Joe Coleman | 85.7 | DET |
| +019+ | 2.15 | Jack Billingham | 86.3 | CIN |
| +020+ | 2.14 | Bill Lee | 67 | BOS |
| +021+ | 2.12 | Jim Palmer | 69 | BAL |
| +022+ | 2.12 | Paul Splittorff | 87.3 | KCA |
| +023+ | 2.07 | Don Sutton | 81 | LAN |
| +024+ | 2.01 | Jerry Reuss | 81.3 | HOU |
| +027+ | 1.88 | Doyle Alexander | 53.3 | BAL |
| +028+ | 1.88 | Nolan Ryan | 90 | ANA |
| +029+ | 1.83 | Gaylord Perry | 91.7 | CLE |
| +030+ | 1.8 | Mel Stottlemyre | 77 | NYA |
| +039+ | 1.64 | Alan Foster | 39.3 | SLN |
| +041+ | 1.63 | Bill Greif | 57.7 | SDN |
| +040+ | 1.63 | Dave McNally | 78.3 | BAL |
| +044+ | 1.59 | Rudy May | 59 | ANA |
| +047+ | 1.56 | Ross Grimsley | 66.7 | CIN |
| +050+ | 1.54 | Jim Colborn | 64.3 | MIL |
| +051+ | 1.53 | Rollie Fingers | 34 | OAK |
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