| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 12.11 | 197310010_NYN_CHN |
| Bert Blyleven | MIN | 7.68 | 197309300_MIN_ANA |
| Steve Rogers | WAS | 4.46 | 197309290_WAS_PIT |
| Ken Holtzman | OAK | 2.52 | 197309290_CHA_OAK |
| Dave Roberts | HOU | 2.14 | 197309300_HOU_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Pete Broberg | TEX | -3.31 | 197309300_KCA_TEX |
| Jim Lonborg | PHI | -2.76 | 197309300_PHI_SLN |
| Mike Kekich | CLE | -2.05 | 197309292_CLE_BAL |
| Clay Kirby | SDN | -1.96 | 197309290_LAN_SDN |
| Steve Busby | KCA | -1.24 | 197309290_KCA_TEX |
Based on accumulated WAA for this season up to 1973-10-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 10.86 | Tom Seaver | 290 | NYN |
| +004+ | 9.26 | Bert Blyleven | 325 | MIN |
| +005+ | 9.12 | Jim Palmer | 296.7 | BAL |
| +008+ | 7.16 | Don Sutton | 256.3 | LAN |
| +010+ | 6.95 | Nolan Ryan | 326 | ANA |
| +011+ | 6.87 | Steve Rogers | 134 | WAS |
| +013+ | 6.78 | Bill Lee | 284.7 | BOS |
| +015+ | 6.54 | Wayne Twitchell | 223.3 | PHI |
| +023+ | 5.41 | Steve Renko | 249.7 | WAS |
| +026+ | 5.34 | Andy Messersmith | 249.7 | LAN |
| +028+ | 5.28 | Ken Holtzman | 297.3 | OAK |
| +029+ | 5.18 | Jerry Koosman | 263 | NYN |
| +033+ | 5.04 | Dave Roberts | 249.3 | HOU |
| +034+ | 4.92 | Mel Stottlemyre | 273 | NYA |
| +036+ | 4.69 | Doc Medich | 235 | NYA |
| +038+ | 4.66 | Jack Billingham | 293.3 | CIN |
| +039+ | 4.61 | Nelson Briles | 218.7 | PIT |
| +044+ | 4.32 | Bob Gibson | 195 | SLN |
| +047+ | 4.17 | Rick Reuschel | 237 | CHN |
| +054+ | 3.88 | Jim Colborn | 314.3 | MIL |
| +058+ | 3.74 | Bill Singer | 315.7 | ANA |
| +059+ | 3.69 | Reggie Cleveland | 224 | SLN |
| +062+ | 3.54 | Jim Rooker | 170.3 | PIT |
| +063+ | 3.52 | Lindy McDaniel | 160.3 | NYA |
| +072+ | 3.12 | Dock Ellis | 192 | PIT |
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