| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 15.1 | 197306050_CHA_BAL |
| Jim Palmer | BAL | 9.09 | 197306070_CHA_BAL |
| Don Sutton | LAN | 7.14 | 197306060_LAN_CHN |
| Bob Gibson | SLN | 2.61 | 197306060_SDN_SLN |
| Nolan Ryan | ANA | 2.57 | 197306070_DET_ANA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rich Hand | ANA | -1.7 | 197306050_DET_ANA |
| Jerry Reuss | HOU | -1.64 | 197306050_PHI_HOU |
| Lloyd Allen | TEX | -1.14 | 197306070_NYA_TEX |
| Steve Blass | PIT | -0.85 | 197306060_SFN_PIT |
| Reggie Cleveland | SLN | -0.84 | 197306070_SDN_SLN |
Based on accumulated WAA for this season up to 1973-06-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.35 | Ken Holtzman | 117 | OAK |
| +004+ | 4.2 | Tom Seaver | 98.3 | NYN |
| +005+ | 4.02 | Wilbur Wood | 144.3 | CHA |
| +007+ | 3.47 | Rick Reuschel | 89 | CHN |
| +009+ | 3.37 | Bill Lee | 93.7 | BOS |
| +008+ | 3.37 | Bill Singer | 111.3 | ANA |
| +010+ | 3.26 | Nolan Ryan | 115 | ANA |
| +012+ | 3.13 | Jim Colborn | 91.3 | MIL |
| +013+ | 3.11 | Ron Bryant | 99.3 | SFN |
| +015+ | 2.74 | Bill Greif | 82.7 | SDN |
| +017+ | 2.7 | Jim Perry | 85.3 | DET |
| +018+ | 2.64 | Jim Palmer | 94.3 | BAL |
| +021+ | 2.5 | Paul Splittorff | 101.3 | KCA |
| +022+ | 2.47 | Gaylord Perry | 119.7 | CLE |
| +025+ | 2.28 | Dave McNally | 90 | BAL |
| +026+ | 2.27 | Wayne Twitchell | 66.7 | PHI |
| +031+ | 2.13 | Don Sutton | 104 | LAN |
| +032+ | 2.07 | Ross Grimsley | 87 | CIN |
| +034+ | 2.05 | Alan Foster | 54 | SLN |
| +038+ | 1.93 | Bert Blyleven | 100.3 | MIN |
| +043+ | 1.81 | Dave Roberts | 80 | HOU |
| +046+ | 1.77 | Jack Billingham | 101 | CIN |
| +048+ | 1.67 | Jerry Koosman | 85.7 | NYN |
| +052+ | 1.57 | Rollie Fingers | 39 | OAK |
| +053+ | 1.55 | Joe Coleman | 104.3 | DET |
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