| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 17.02 | 197305060_NYA_CHA |
| Don Sutton | LAN | 7.55 | 197305070_PIT_LAN |
| Jim Palmer | BAL | 4.76 | 197305060_ANA_BAL |
| Tom Seaver | NYN | 4.29 | 197305070_ATL_NYN |
| Bert Blyleven | MIN | 3.66 | 197305050_BOS_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wayne Simpson | KCA | -3.98 | 197305050_KCA_MIL |
| Carl Morton | ATL | -2.07 | 197305050_ATL_PHI |
| Jerry Reuss | HOU | -1.49 | 197305060_HOU_NYN |
| Johnny Odom | OAK | -1.34 | 197305050_OAK_CLE |
| Mike Corkins | SDN | -1.31 | 197305050_PIT_SDN |
Based on accumulated WAA for this season up to 1973-05-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 4.01 | Wilbur Wood | 73.3 | CHA |
| +002+ | 3.02 | Ken Holtzman | 62.7 | OAK |
| +003+ | 2.55 | Dave McNally | 57.3 | BAL |
| +004+ | 2.53 | Tom Seaver | 56.3 | NYN |
| +006+ | 2.34 | Bill Greif | 37 | SDN |
| +008+ | 2.29 | Bill Singer | 50.7 | ANA |
| +010+ | 2.18 | Joe Coleman | 55 | DET |
| +012+ | 2.12 | Ron Bryant | 54.3 | SFN |
| +021+ | 1.67 | Rudy May | 33 | ANA |
| +022+ | 1.66 | Don Sutton | 57.7 | LAN |
| +023+ | 1.65 | Rick Reuschel | 42.3 | CHN |
| +024+ | 1.61 | Ross Grimsley | 50.3 | CIN |
| +025+ | 1.52 | Nolan Ryan | 61.7 | ANA |
| +027+ | 1.51 | Jerry Reuss | 50.7 | HOU |
| +028+ | 1.51 | Jerry Koosman | 41.3 | NYN |
| +030+ | 1.45 | Jim Perry | 41 | DET |
| +034+ | 1.36 | Gaylord Perry | 58 | CLE |
| +035+ | 1.36 | Carl Morton | 46 | ATL |
| XXXXX | 1.24 | Rogelio Moret | 14.7 | BOS |
| XXXXX | 1.17 | Al Downing | 35.7 | LAN |
| XXXXX | 1.04 | Jim Barr | 46.3 | SFN |
| XXXXX | 1.04 | Don Gullett | 53.7 | CIN |
| XXXXX | 1.03 | Bob Gibson | 48 | SLN |
| XXXXX | 0.96 | Roger Nelson | 29.7 | CIN |
| XXXXX | 0.94 | Mel Stottlemyre | 49.7 | NYA |
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