| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 12.95 | 197306080_CHA_CLE |
| Jim Palmer | BAL | 9.09 | 197306070_CHA_BAL |
| Tom Seaver | NYN | 8.48 | 197306080_LAN_NYN |
| Don Sutton | LAN | 7.14 | 197306060_LAN_CHN |
| Bert Blyleven | MIN | 4.23 | 197306080_MIN_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Pete Broberg | TEX | -3.03 | 197306080_BOS_TEX |
| Steve Arlin | SDN | -2.68 | 197306080_SDN_PHI |
| Ron Reed | ATL | -1.66 | 197306080_SLN_ATL |
| Steve Blass | PIT | -0.85 | 197306060_SFN_PIT |
| Reggie Cleveland | SLN | -0.84 | 197306070_SDN_SLN |
Based on accumulated WAA for this season up to 1973-06-08.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.36 | Ken Holtzman | 117 | OAK |
| +004+ | 4.35 | Wilbur Wood | 153.3 | CHA |
| +006+ | 3.74 | Tom Seaver | 105.3 | NYN |
| +008+ | 3.48 | Rick Reuschel | 89 | CHN |
| +009+ | 3.39 | Bill Lee | 93.7 | BOS |
| +010+ | 3.38 | Bill Singer | 111.3 | ANA |
| +011+ | 3.27 | Nolan Ryan | 115 | ANA |
| +013+ | 3.14 | Jim Colborn | 91.3 | MIL |
| +014+ | 3.13 | Ron Bryant | 99.3 | SFN |
| +016+ | 2.75 | Bill Greif | 82.7 | SDN |
| +018+ | 2.71 | Jim Perry | 85.3 | DET |
| +019+ | 2.7 | Bert Blyleven | 109.3 | MIN |
| +020+ | 2.65 | Jim Palmer | 94.3 | BAL |
| +021+ | 2.62 | Dave McNally | 99 | BAL |
| +022+ | 2.51 | Paul Splittorff | 101.3 | KCA |
| +023+ | 2.48 | Gaylord Perry | 119.7 | CLE |
| +030+ | 2.28 | Wayne Twitchell | 66.7 | PHI |
| +033+ | 2.14 | Don Sutton | 104 | LAN |
| +034+ | 2.09 | Ross Grimsley | 87 | CIN |
| +036+ | 2.06 | Alan Foster | 54 | SLN |
| +042+ | 1.82 | Dave Roberts | 80 | HOU |
| +044+ | 1.8 | Jack Billingham | 101 | CIN |
| +051+ | 1.68 | Jerry Koosman | 85.7 | NYN |
| +054+ | 1.58 | Rollie Fingers | 39 | OAK |
| +055+ | 1.56 | Joe Coleman | 104.3 | DET |
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