| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 12.95 | 197306080_CHA_CLE |
| Jim Palmer | BAL | 9.09 | 197306070_CHA_BAL |
| Tom Seaver | NYN | 8.48 | 197306080_LAN_NYN |
| Gaylord Perry | CLE | 5.73 | 197306090_CHA_CLE |
| Bert Blyleven | MIN | 4.23 | 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 |
| Ken Brett | PHI | -0.84 | 197306090_SDN_PHI |
| Reggie Cleveland | SLN | -0.84 | 197306070_SDN_SLN |
Based on accumulated WAA for this season up to 1973-06-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.13 | Ken Holtzman | 126 | OAK |
| +002+ | 4.38 | Wilbur Wood | 153.3 | CHA |
| +005+ | 3.76 | Jim Colborn | 98.7 | MIL |
| +006+ | 3.76 | Tom Seaver | 105.3 | NYN |
| +010+ | 3.49 | Rick Reuschel | 89 | CHN |
| +011+ | 3.4 | Bill Lee | 93.7 | BOS |
| +012+ | 3.39 | Bill Singer | 111.3 | ANA |
| +013+ | 3.29 | Nolan Ryan | 115 | ANA |
| +014+ | 3.16 | Ron Bryant | 99.3 | SFN |
| +017+ | 2.73 | Bert Blyleven | 109.3 | MIN |
| +018+ | 2.66 | Jim Palmer | 94.3 | BAL |
| +019+ | 2.63 | Dave McNally | 99 | BAL |
| +021+ | 2.52 | Paul Splittorff | 101.3 | KCA |
| +023+ | 2.46 | Jim Perry | 92 | DET |
| +026+ | 2.31 | Bill Greif | 87 | SDN |
| +027+ | 2.28 | Wayne Twitchell | 66.7 | PHI |
| +030+ | 2.19 | Ross Grimsley | 88 | CIN |
| +032+ | 2.18 | Don Sutton | 104 | LAN |
| +036+ | 2.08 | Alan Foster | 54 | SLN |
| +040+ | 2.02 | Dave Roberts | 82.3 | HOU |
| +041+ | 1.99 | Gaylord Perry | 128.7 | CLE |
| +043+ | 1.9 | Jack Billingham | 107 | CIN |
| +051+ | 1.7 | Jerry Koosman | 85.7 | NYN |
| +054+ | 1.6 | Joe Coleman | 104.3 | DET |
| +055+ | 1.58 | Rollie Fingers | 39 | OAK |
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