| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Palmer | BAL | 9 | 197306020_BAL_TEX |
| Tom Seaver | NYN | 7.55 | 197306030_NYN_SDN |
| Gaylord Perry | CLE | 5.7 | 197306030_CLE_KCA |
| Bert Blyleven | MIN | 3.64 | 197306020_DET_MIN |
| Ken Holtzman | OAK | 2.9 | 197306040_MIL_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Pete Broberg | TEX | -2.24 | 197306030_BAL_TEX |
| Ron Reed | ATL | -1.75 | 197306030_ATL_CHN |
| Steve Busby | KCA | -1.37 | 197306030_CLE_KCA |
| Ken Brett | PHI | -1.21 | 197306030_PHI_SFN |
| Woodie Fryman | DET | -1.19 | 197306020_DET_MIN |
Based on accumulated WAA for this season up to 1973-06-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.27 | Ken Holtzman | 117 | OAK |
| +002+ | 4.7 | Wilbur Wood | 136.7 | CHA |
| +004+ | 4.13 | Tom Seaver | 98.3 | NYN |
| +008+ | 3.4 | Rick Reuschel | 81.3 | CHN |
| +009+ | 3.4 | Bill Singer | 105 | ANA |
| +010+ | 3.05 | Jim Colborn | 91.3 | MIL |
| +011+ | 2.9 | Bill Lee | 83.7 | BOS |
| +012+ | 2.89 | Don Sutton | 99 | LAN |
| +013+ | 2.88 | Ron Bryant | 92.3 | SFN |
| +015+ | 2.82 | Bill Greif | 74.7 | SDN |
| +016+ | 2.6 | Jim Palmer | 87 | BAL |
| +017+ | 2.56 | Jim Perry | 79.7 | DET |
| +019+ | 2.51 | Gaylord Perry | 119.7 | CLE |
| +023+ | 2.43 | Nolan Ryan | 106 | ANA |
| +024+ | 2.42 | Paul Splittorff | 101.3 | KCA |
| +028+ | 2.22 | Dave McNally | 90 | BAL |
| +030+ | 2.08 | Joe Coleman | 99.3 | DET |
| +033+ | 1.98 | Bert Blyleven | 100.3 | MIN |
| +036+ | 1.86 | Ross Grimsley | 80 | CIN |
| +038+ | 1.79 | Alan Foster | 46.3 | SLN |
| +039+ | 1.76 | Dave Roberts | 80 | HOU |
| +041+ | 1.73 | Jack Billingham | 101 | CIN |
| +043+ | 1.67 | Rollie Fingers | 38 | OAK |
| +050+ | 1.51 | Gene Garber | 53 | KCA |
| +051+ | 1.48 | Jim Slaton | 67 | MIL |
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