| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 10.46 | 197306260_MIN_CHA |
| Jim Palmer | BAL | 7.23 | 197306260_BAL_MIL |
| Bert Blyleven | MIN | 6.67 | 197306250_MIN_CHA |
| Don Sutton | LAN | 5.47 | 197306260_LAN_SDN |
| Ken Holtzman | OAK | 4.23 | 197306250_OAK_TEX |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Woodie Fryman | DET | -2.32 | 197306272_MIL_DET |
| Brent Strom | CLE | -2.1 | 197306260_NYA_CLE |
| Burt Hooton | CHN | -0.65 | 197306260_CHN_NYN |
| Jerry Reuss | HOU | -0.64 | 197306270_CIN_HOU |
| Ron Schueler | ATL | -0.57 | 197306260_ATL_SFN |
Based on accumulated WAA for this season up to 1973-06-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.62 | Ken Holtzman | 149 | OAK |
| +004+ | 5.1 | Bill Lee | 125.3 | BOS |
| +006+ | 4.74 | Tom Seaver | 123.3 | NYN |
| +007+ | 4.57 | Rick Reuschel | 119.7 | CHN |
| +009+ | 4.31 | Wilbur Wood | 192.7 | CHA |
| +008+ | 4.31 | Bill Singer | 151.7 | ANA |
| +012+ | 4.05 | Bert Blyleven | 141.7 | MIN |
| +013+ | 3.9 | Don Sutton | 139.3 | LAN |
| +015+ | 3.47 | Jim Colborn | 129.7 | MIL |
| +016+ | 3.41 | Wayne Twitchell | 99.7 | PHI |
| +017+ | 3.39 | Jim Palmer | 121.3 | BAL |
| +018+ | 3.28 | Ron Bryant | 136.7 | SFN |
| +021+ | 2.91 | Dave McNally | 125.7 | BAL |
| +022+ | 2.77 | Nolan Ryan | 148.3 | ANA |
| +023+ | 2.75 | Paul Splittorff | 141 | KCA |
| +026+ | 2.71 | Rollie Fingers | 54.7 | OAK |
| +029+ | 2.59 | Ross Grimsley | 111.3 | CIN |
| +031+ | 2.53 | Rick Wise | 120 | SLN |
| +032+ | 2.52 | Sonny Siebert | 65.3 | TOT |
| +034+ | 2.49 | Jim Perry | 115 | DET |
| +037+ | 2.43 | Phil Niekro | 94.7 | ATL |
| +042+ | 2.37 | Gaylord Perry | 164.7 | CLE |
| +044+ | 2.33 | Jerry Koosman | 114.7 | NYN |
| +053+ | 2.1 | Ray Corbin | 59.3 | MIN |
| +059+ | 1.95 | Fred Beene | 44 | NYA |
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