| Starter | Tm | Tier | Game |
|---|---|---|---|
| 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 |
| Dave McNally | BAL | 3.08 | 197306270_NYA_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Woodie Fryman | DET | -2.32 | 197306272_MIL_DET |
| Jim Lonborg | PHI | -2.32 | 197306280_PHI_NYN |
| Pete Broberg | TEX | -1.95 | 197306280_MIN_TEX |
| Steve Busby | KCA | -1.46 | 197306280_KCA_OAK |
| Dick Bosman | CLE | -1.44 | 197306282_CLE_BOS |
Based on accumulated WAA for this season up to 1973-06-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.76 | Ken Holtzman | 158 | OAK |
| +004+ | 5.1 | Bill Lee | 125.3 | BOS |
| +006+ | 4.91 | Tom Seaver | 130.3 | NYN |
| +007+ | 4.82 | Bert Blyleven | 150.7 | MIN |
| +008+ | 4.79 | Rick Reuschel | 127.3 | CHN |
| +011+ | 4.32 | Bill Singer | 151.7 | ANA |
| +010+ | 4.32 | Wilbur Wood | 192.7 | CHA |
| +012+ | 4.17 | Wayne Twitchell | 108.7 | PHI |
| +014+ | 3.9 | Don Sutton | 139.3 | LAN |
| +016+ | 3.49 | Jim Colborn | 129.7 | MIL |
| +018+ | 3.4 | Jim Palmer | 121.3 | BAL |
| +019+ | 3.26 | Ron Bryant | 136.7 | SFN |
| +022+ | 2.92 | Dave McNally | 125.7 | BAL |
| +024+ | 2.83 | Rollie Fingers | 56 | OAK |
| +025+ | 2.79 | Paul Splittorff | 141 | KCA |
| +028+ | 2.7 | Nolan Ryan | 157.3 | ANA |
| +031+ | 2.59 | Ross Grimsley | 111.3 | CIN |
| +032+ | 2.57 | Phil Niekro | 101.7 | ATL |
| +034+ | 2.52 | Sonny Siebert | 65.3 | TOT |
| +041+ | 2.33 | Jerry Koosman | 114.7 | NYN |
| +042+ | 2.31 | Clyde Wright | 125.7 | ANA |
| +053+ | 2.1 | Ray Corbin | 59.3 | MIN |
| +056+ | 2.06 | Stan Bahnsen | 135.3 | CHA |
| +063+ | 1.95 | Fred Beene | 44 | NYA |
| +064+ | 1.95 | Jim Hunter | 147.7 | OAK |
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