| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 10.31 | 197306300_CHA_OAK |
| Tom Seaver | NYN | 7.92 | 197306290_NYN_CHN |
| Bert Blyleven | MIN | 6.58 | 197306290_MIN_ANA |
| Gaylord Perry | CLE | 4.02 | 197306290_CLE_NYA |
| Ken Holtzman | OAK | 3.76 | 197306290_CHA_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Steve Arlin | SDN | -3.17 | 197306300_SDN_HOU |
| Jim Lonborg | PHI | -2.32 | 197306280_PHI_NYN |
| Steve Dunning | TEX | -2.22 | 197306301_KCA_TEX |
| Brent Strom | CLE | -2.18 | 197306300_CLE_NYA |
| Steve Busby | KCA | -1.46 | 197306280_KCA_OAK |
Based on accumulated WAA for this season up to 1973-06-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.74 | Ken Holtzman | 158 | OAK |
| +005+ | 5.09 | Bill Lee | 125.3 | BOS |
| +006+ | 4.9 | Tom Seaver | 130.3 | NYN |
| +007+ | 4.81 | Bert Blyleven | 150.7 | MIN |
| +008+ | 4.78 | Rick Reuschel | 127.3 | CHN |
| +010+ | 4.37 | Wilbur Wood | 200.7 | CHA |
| +011+ | 4.3 | Bill Singer | 151.7 | ANA |
| +012+ | 4.17 | Wayne Twitchell | 108.7 | PHI |
| +014+ | 3.83 | Don Sutton | 139.3 | LAN |
| +016+ | 3.48 | Jim Colborn | 129.7 | MIL |
| +018+ | 3.41 | Jim Palmer | 121.3 | BAL |
| +019+ | 3.27 | Ron Bryant | 136.7 | SFN |
| +024+ | 2.93 | Dave McNally | 125.7 | BAL |
| +026+ | 2.83 | Rollie Fingers | 56 | OAK |
| +027+ | 2.78 | Paul Splittorff | 141 | KCA |
| +028+ | 2.69 | Sonny Siebert | 72.3 | TOT |
| +029+ | 2.68 | Nolan Ryan | 157.3 | ANA |
| +033+ | 2.56 | Phil Niekro | 101.7 | ATL |
| +034+ | 2.52 | Ross Grimsley | 111.3 | CIN |
| +042+ | 2.32 | Jerry Koosman | 114.7 | NYN |
| +045+ | 2.3 | Clyde Wright | 125.7 | ANA |
| +054+ | 2.06 | Stan Bahnsen | 135.3 | CHA |
| +055+ | 2.06 | Ray Corbin | 61.3 | MIN |
| +061+ | 1.95 | Fred Beene | 44 | NYA |
| +062+ | 1.93 | Jim Hunter | 147.7 | OAK |
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