| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 12.25 | 197306220_OAK_CHA |
| Jim Palmer | BAL | 8.84 | 197306210_BAL_BOS |
| Bert Blyleven | MIN | 5.97 | 197306210_ANA_MIN |
| Don Sutton | LAN | 5.53 | 197306220_CIN_LAN |
| Ken Holtzman | OAK | 4.09 | 197306210_OAK_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Steve Blass | PIT | -4.45 | 197306220_NYN_PIT |
| Pete Broberg | TEX | -2.11 | 197306230_TEX_KCA |
| Mike Kekich | CLE | -1.88 | 197306220_CLE_MIL |
| Ron Reed | ATL | -1.8 | 197306231_ATL_SDN |
| Woodie Fryman | DET | -1.75 | 197306230_DET_NYA |
Based on accumulated WAA for this season up to 1973-06-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.99 | Ken Holtzman | 146 | OAK |
| +005+ | 4.57 | Bill Lee | 116.3 | BOS |
| +006+ | 4.56 | Rick Reuschel | 112.7 | CHN |
| +008+ | 4.43 | Jim Colborn | 125.7 | MIL |
| +007+ | 4.43 | Tom Seaver | 114.3 | NYN |
| +009+ | 4.18 | Wilbur Wood | 183.7 | CHA |
| +010+ | 4 | Bert Blyleven | 133.7 | MIN |
| +011+ | 3.78 | Wayne Twitchell | 93.7 | PHI |
| +012+ | 3.77 | Bill Singer | 142.7 | ANA |
| +015+ | 3.47 | Ron Bryant | 128.7 | SFN |
| +016+ | 3.19 | Don Sutton | 130.3 | LAN |
| +020+ | 2.77 | Jerry Koosman | 109.7 | NYN |
| +022+ | 2.69 | Jim Palmer | 112.3 | BAL |
| +024+ | 2.61 | Rollie Fingers | 51 | OAK |
| +026+ | 2.58 | Rick Wise | 120 | SLN |
| +033+ | 2.46 | Paul Splittorff | 132.7 | KCA |
| +034+ | 2.41 | Bob Gibson | 123 | SLN |
| +040+ | 2.23 | Nolan Ryan | 139.3 | ANA |
| +041+ | 2.22 | Jim Perry | 107 | DET |
| +042+ | 2.22 | Dave McNally | 116.7 | BAL |
| +044+ | 2.19 | Phil Niekro | 91.7 | ATL |
| +045+ | 2.15 | Ross Grimsley | 106.3 | CIN |
| +048+ | 2.06 | Rudy May | 105.3 | ANA |
| +049+ | 2.05 | Gaylord Perry | 155.7 | CLE |
| +053+ | 2 | Sonny Siebert | 59.3 | TOT |
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