| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 12.95 | 197306080_CHA_CLE |
| Tom Seaver | NYN | 8.48 | 197306080_LAN_NYN |
| Gaylord Perry | CLE | 5.73 | 197306090_CHA_CLE |
| Bert Blyleven | MIN | 4.23 | 197306080_MIN_BAL |
| Dave McNally | BAL | 3.46 | 197306080_MIN_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Pete Broberg | TEX | -3.03 | 197306080_BOS_TEX |
| Steve Arlin | SDN | -2.68 | 197306080_SDN_PHI |
| Ron Reed | ATL | -1.66 | 197306080_SLN_ATL |
| Jerry Reuss | HOU | -1.31 | 197306100_PIT_HOU |
| Ken Brett | PHI | -0.84 | 197306090_SDN_PHI |
Based on accumulated WAA for this season up to 1973-06-10.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.19 | Ken Holtzman | 126 | OAK |
| +004+ | 4.47 | Wilbur Wood | 153.3 | CHA |
| +005+ | 4.21 | Bill Lee | 102.7 | BOS |
| +007+ | 3.81 | Jim Colborn | 98.7 | MIL |
| +008+ | 3.8 | Tom Seaver | 105.3 | NYN |
| +011+ | 3.53 | Rick Reuschel | 89 | CHN |
| +012+ | 3.33 | Nolan Ryan | 115 | ANA |
| +014+ | 3.22 | Ron Bryant | 99.3 | SFN |
| +015+ | 3.08 | Wayne Twitchell | 75.7 | PHI |
| +016+ | 2.78 | Bert Blyleven | 109.3 | MIN |
| +018+ | 2.7 | Paul Splittorff | 110.3 | KCA |
| +017+ | 2.7 | Jim Palmer | 94.3 | BAL |
| +020+ | 2.68 | Dave McNally | 99 | BAL |
| +022+ | 2.54 | Bill Singer | 118 | ANA |
| +023+ | 2.51 | Jim Perry | 92 | DET |
| +027+ | 2.36 | Bill Greif | 87 | SDN |
| +030+ | 2.24 | Ross Grimsley | 88 | CIN |
| +031+ | 2.23 | Don Sutton | 104 | LAN |
| +039+ | 2.06 | Dave Roberts | 82.3 | HOU |
| +041+ | 2.05 | Alan Foster | 60.7 | SLN |
| +042+ | 2.05 | Gaylord Perry | 128.7 | CLE |
| +043+ | 1.98 | Jim Hunter | 116 | OAK |
| +044+ | 1.98 | Jerry Koosman | 93.7 | NYN |
| +045+ | 1.96 | Jack Billingham | 107 | CIN |
| +055+ | 1.66 | Jerry Reuss | 102.7 | HOU |
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