| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 7.39 | 197304140_KCA_CHA |
| Mickey Lolich | DET | 4.01 | 197304120_BAL_DET |
| Don Wilson | HOU | 3.27 | 197304130_HOU_SDN |
| Tom Seaver | NYN | 2.66 | 197304120_NYN_SLN |
| Bert Blyleven | MIN | 2.17 | 197304140_OAK_MIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Carl Morton | ATL | -4.96 | 197304140_ATL_LAN |
| Wayne Simpson | KCA | -4.18 | 197304120_TEX_KCA |
| Jerry Reuss | HOU | -3.89 | 197304140_HOU_SDN |
| Jim Perry | DET | -2.09 | 197304140_CLE_DET |
| Steve Dunning | CLE | -1.83 | 197304140_CLE_DET |
Based on accumulated WAA for this season up to 1973-04-14.
| Rank | WAA | Name | IP | Tm |
|---|
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