| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 10.31 | 197306300_CHA_OAK |
| Jim Palmer | BAL | 8.49 | 197307011_BAL_DET |
| Don Sutton | LAN | 6.34 | 197307011_LAN_CIN |
| Bill Lee | BOS | 5.47 | 197307011_MIL_BOS |
| Jim Hunter | OAK | 2.27 | 197307011_CHA_OAK |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Steve Arlin | SDN | -3.17 | 197306300_SDN_HOU |
| Johnny Odom | OAK | -2.66 | 197307012_CHA_OAK |
| Woodie Fryman | DET | -2.57 | 197307020_DET_CLE |
| Steve Dunning | TEX | -2.22 | 197306301_KCA_TEX |
| Brent Strom | CLE | -2.18 | 197306300_CLE_NYA |
Based on accumulated WAA for this season up to 1973-07-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.77 | Ken Holtzman | 158 | OAK |
| +005+ | 4.92 | Tom Seaver | 130.3 | NYN |
| +006+ | 4.83 | Bert Blyleven | 150.7 | MIN |
| +007+ | 4.8 | Rick Reuschel | 127.3 | CHN |
| +009+ | 4.67 | Bill Singer | 160.7 | ANA |
| +010+ | 4.46 | Wilbur Wood | 200.7 | CHA |
| +012+ | 4.2 | Wayne Twitchell | 108.7 | PHI |
| +013+ | 3.95 | Bill Lee | 129 | BOS |
| +015+ | 3.74 | Don Sutton | 148 | LAN |
| +016+ | 3.47 | Ron Bryant | 143.7 | SFN |
| +017+ | 3.45 | Dave McNally | 133.7 | BAL |
| +021+ | 3.17 | Jim Colborn | 138 | MIL |
| +025+ | 3.06 | Jim Palmer | 129 | BAL |
| +026+ | 3.03 | Rollie Fingers | 58.3 | OAK |
| +031+ | 2.7 | Sonny Siebert | 72.3 | TOT |
| +032+ | 2.7 | Ross Grimsley | 118.3 | CIN |
| +029+ | 2.7 | Nolan Ryan | 157.3 | ANA |
| +035+ | 2.62 | Phil Niekro | 109.7 | ATL |
| +041+ | 2.43 | Clyde Wright | 132 | ANA |
| +043+ | 2.4 | Ray Corbin | 65.3 | MIN |
| +055+ | 2.12 | Stan Bahnsen | 135.3 | CHA |
| +056+ | 2.09 | John Curtis | 119.7 | BOS |
| +060+ | 2.04 | Paul Splittorff | 146.7 | KCA |
| +065+ | 1.97 | Jerry Koosman | 122.7 | NYN |
| +066+ | 1.95 | Jim Hunter | 155 | OAK |
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