| 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 |
| Steve Arlin | SDN | -3.11 | 197306200_HOU_SDN |
| Mike Kekich | CLE | -1.88 | 197306220_CLE_MIL |
| Steve Busby | KCA | -1.17 | 197306200_OAK_KCA |
| Carl Morton | ATL | -1.11 | 197306210_ATL_LAN |
Based on accumulated WAA for this season up to 1973-06-22.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.98 | Ken Holtzman | 146 | OAK |
| +004+ | 4.59 | Bill Lee | 116.3 | BOS |
| +005+ | 4.58 | Rick Reuschel | 112.7 | CHN |
| +007+ | 4.44 | Tom Seaver | 114.3 | NYN |
| +008+ | 4.42 | Jim Colborn | 125.7 | MIL |
| +009+ | 4.17 | Wilbur Wood | 183.7 | CHA |
| +010+ | 4.03 | Bert Blyleven | 133.7 | MIN |
| +011+ | 3.85 | Ron Bryant | 123.3 | SFN |
| +012+ | 3.78 | Wayne Twitchell | 93.7 | PHI |
| +015+ | 3.28 | Bill Singer | 134 | ANA |
| +017+ | 3.17 | Don Sutton | 130.3 | LAN |
| +021+ | 2.78 | Jerry Koosman | 109.7 | NYN |
| +023+ | 2.68 | Jim Palmer | 112.3 | BAL |
| +024+ | 2.64 | Dave McNally | 114.3 | BAL |
| +026+ | 2.61 | Rollie Fingers | 51 | OAK |
| +032+ | 2.45 | Bob Gibson | 123 | SLN |
| +033+ | 2.4 | Paul Splittorff | 124.7 | KCA |
| +035+ | 2.27 | Nolan Ryan | 139.3 | ANA |
| +041+ | 2.2 | Jim Perry | 107 | DET |
| +043+ | 2.16 | Phil Niekro | 91.7 | ATL |
| +042+ | 2.16 | Rick Wise | 110 | SLN |
| +045+ | 2.13 | Ross Grimsley | 106.3 | CIN |
| +048+ | 2.09 | Rudy May | 105.3 | ANA |
| +051+ | 2.02 | Gaylord Perry | 155.7 | CLE |
| +053+ | 1.99 | Sonny Siebert | 59.3 | TOT |
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