| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 16.5 | 197304290_CHA_BOS |
| Don Sutton | LAN | 6.44 | 197305020_CHN_LAN |
| Tom Seaver | NYN | 5.17 | 197305020_CIN_NYN |
| Jim Palmer | BAL | 5.1 | 197305020_BAL_CHA |
| Bert Blyleven | MIN | 4.76 | 197304291_MIN_NYA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wayne Simpson | KCA | -4.76 | 197304290_KCA_DET |
| Carl Morton | ATL | -3.41 | 197304290_NYN_ATL |
| Jerry Reuss | HOU | -2.52 | 197305010_HOU_PHI |
| Steve Arlin | SDN | -2.09 | 197304290_SDN_CHN |
| Pete Broberg | TEX | -1.95 | 197305020_TEX_BOS |
Based on accumulated WAA for this season up to 1973-05-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.61 | Wilbur Wood | 64.3 | CHA |
| +003+ | 2.16 | Ken Holtzman | 53.7 | OAK |
| +004+ | 2.13 | Jerry Reuss | 48 | HOU |
| +005+ | 2.11 | Don Sutton | 51 | LAN |
| +006+ | 2.04 | Tom Seaver | 47.3 | NYN |
| +007+ | 1.98 | Jerry Koosman | 34 | NYN |
| +008+ | 1.96 | Jim Barr | 42.3 | SFN |
| +009+ | 1.95 | Dave McNally | 48.3 | BAL |
| +010+ | 1.91 | Ron Bryant | 47 | SFN |
| +013+ | 1.76 | Don Gullett | 47.3 | CIN |
| +016+ | 1.68 | Bill Singer | 41.7 | ANA |
| +018+ | 1.51 | Joe Coleman | 47.7 | DET |
| +020+ | 1.42 | Steve Carlton | 59 | PHI |
| +026+ | 1.37 | Bill Greif | 21 | SDN |
| +028+ | 1.35 | Gaylord Perry | 51 | CLE |
| +030+ | 1.34 | Rick Reuschel | 29 | CHN |
| XXXXX | 1.21 | Rogelio Moret | 14.7 | BOS |
| XXXXX | 1.19 | Jim Slaton | 27.3 | MIL |
| XXXXX | 1.18 | Ross Grimsley | 45.3 | CIN |
| XXXXX | 1.08 | Nolan Ryan | 55 | ANA |
| XXXXX | 1.06 | Jim Colborn | 25.7 | MIL |
| XXXXX | 1.02 | Jim Perry | 33.7 | DET |
| XXXXX | 1.01 | Harry Parker | 14.7 | NYN |
| XXXXX | 0.97 | Jack Billingham | 45.3 | CIN |
| XXXXX | 0.96 | Luke Walker | 12.3 | PIT |
_