| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 10.35 | 197307031_CHA_TEX |
| Bert Blyleven | MIN | 8.32 | 197307030_MIN_KCA |
| Tom Seaver | NYN | 8.23 | 197307040_NYN_WAS |
| Ken Holtzman | OAK | 3.98 | 197307030_ANA_OAK |
| Bill Lee | BOS | 3.39 | 197307050_BOS_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Steve Blass | PIT | -9.24 | 197307032_PIT_SLN |
| Jim Lonborg | PHI | -2.35 | 197307030_PHI_CHN |
| Brent Strom | CLE | -2.19 | 197307050_CLE_DET |
| Steve Arlin | SDN | -2.16 | 197307050_SDN_LAN |
| Ron Reed | ATL | -2.05 | 197307041_HOU_ATL |
Based on accumulated WAA for this season up to 1973-07-05.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.61 | Ken Holtzman | 167 | OAK |
| +004+ | 5.37 | Wilbur Wood | 209.7 | CHA |
| +005+ | 5.18 | Bill Singer | 168 | ANA |
| +006+ | 5.01 | Tom Seaver | 137.7 | NYN |
| +009+ | 4.55 | Wayne Twitchell | 114.7 | PHI |
| +011+ | 4.34 | Bert Blyleven | 158.7 | MIN |
| +012+ | 4.19 | Rick Reuschel | 132 | CHN |
| +013+ | 3.95 | Bill Lee | 138 | BOS |
| +014+ | 3.83 | Don Sutton | 148 | LAN |
| +017+ | 3.5 | Dave McNally | 133.7 | BAL |
| +018+ | 3.5 | Ron Bryant | 150.3 | SFN |
| +021+ | 3.26 | Rollie Fingers | 60.7 | OAK |
| +022+ | 3.19 | Jim Palmer | 130 | BAL |
| +028+ | 2.91 | Sonny Siebert | 79.3 | TOT |
| +032+ | 2.85 | Nolan Ryan | 165.3 | ANA |
| +035+ | 2.72 | Ross Grimsley | 125.3 | CIN |
| +036+ | 2.59 | Rick Wise | 134.7 | SLN |
| +040+ | 2.51 | Clyde Wright | 132 | ANA |
| +041+ | 2.48 | Jim Colborn | 138.7 | MIL |
| +047+ | 2.37 | Stan Bahnsen | 142 | CHA |
| +053+ | 2.16 | John Curtis | 119.7 | BOS |
| +054+ | 2.15 | Dave Roberts | 117 | HOU |
| +062+ | 2.07 | Doc Medich | 114.7 | NYA |
| +063+ | 2.05 | Jerry Koosman | 122.7 | NYN |
| +065+ | 2.04 | Nelson Briles | 119 | PIT |
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