| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 11.92 | 197306150_MIL_CHA |
| Tom Seaver | NYN | 7.22 | 197306130_SFN_NYN |
| Ken Holtzman | OAK | 4.85 | 197306130_NYA_OAK |
| Gaylord Perry | CLE | 4.67 | 197306130_TEX_CLE |
| Dave McNally | BAL | 4.17 | 197306130_KCA_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Steve Arlin | SDN | -2.85 | 197306150_SDN_NYN |
| Pete Broberg | TEX | -2.49 | 197306130_TEX_CLE |
| Ron Reed | ATL | -1.52 | 197306130_PIT_ATL |
| Jerry Reuss | HOU | -0.65 | 197306140_CHN_HOU |
| Milt Pappas | CHN | -0.64 | 197306130_CHN_HOU |
Based on accumulated WAA for this season up to 1973-06-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 5.96 | Ken Holtzman | 130 | OAK |
| +004+ | 4.54 | Wilbur Wood | 170.3 | CHA |
| +005+ | 4.41 | Tom Seaver | 114.3 | NYN |
| +006+ | 4.37 | Rick Reuschel | 98 | CHN |
| +007+ | 4.31 | Bill Lee | 102.7 | BOS |
| +009+ | 4.02 | Ron Bryant | 117.7 | SFN |
| +010+ | 3.99 | Jim Colborn | 107.7 | MIL |
| +012+ | 3.66 | Wayne Twitchell | 84.7 | PHI |
| +015+ | 3.14 | Paul Splittorff | 119.3 | KCA |
| +017+ | 2.96 | Dave McNally | 106.7 | BAL |
| +018+ | 2.88 | Nolan Ryan | 124 | ANA |
| +020+ | 2.75 | Bill Singer | 125 | ANA |
| +022+ | 2.63 | Jim Palmer | 100.3 | BAL |
| +024+ | 2.53 | Bert Blyleven | 115.7 | MIN |
| +028+ | 2.41 | Don Sutton | 112.7 | LAN |
| +029+ | 2.39 | Jim Hunter | 125 | OAK |
| +031+ | 2.36 | Dave Roberts | 90.3 | HOU |
| +033+ | 2.35 | Bill Greif | 93 | SDN |
| +038+ | 2.15 | Alan Foster | 68.7 | SLN |
| +042+ | 2.04 | Jerry Koosman | 93.7 | NYN |
| +043+ | 2.03 | Gaylord Perry | 137.7 | CLE |
| +048+ | 1.93 | Rollie Fingers | 42.7 | OAK |
| +057+ | 1.72 | Jim Perry | 92 | DET |
| +059+ | 1.71 | Bob Gibson | 105 | SLN |
| +060+ | 1.68 | Rick Wise | 104.7 | SLN |
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