| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 15.45 | 197309040_PHI_NYN |
| Bert Blyleven | MIN | 6.55 | 197309040_MIN_KCA |
| Don Sutton | LAN | 5.77 | 197309060_SDN_LAN |
| Jim Palmer | BAL | 5.36 | 197309040_BAL_BOS |
| Ken Holtzman | OAK | 4.43 | 197309040_OAK_ANA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Lonborg | PHI | -3.4 | 197309040_PHI_NYN |
| Woodie Fryman | DET | -3.17 | 197309060_DET_CLE |
| Mike Kekich | CLE | -2.42 | 197309040_CLE_MIL |
| Jim Kaat | CHA | -1.18 | 197309040_TEX_CHA |
| Pat Dobson | NYA | -0.92 | 197309060_MIL_NYA |
Based on accumulated WAA for this season up to 1973-09-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.77 | Tom Seaver | 251 | NYN |
| +003+ | 8.06 | Bert Blyleven | 275.7 | MIN |
| +007+ | 7.29 | Don Sutton | 231.7 | LAN |
| +008+ | 6.77 | Jim Palmer | 253.3 | BAL |
| +011+ | 6.21 | Ken Holtzman | 265 | OAK |
| +012+ | 6.07 | Wayne Twitchell | 211 | PHI |
| +015+ | 5.65 | Nolan Ryan | 279 | ANA |
| +018+ | 5.39 | Bill Lee | 243.3 | BOS |
| +019+ | 5.31 | Terry Forster | 138.7 | CHA |
| +020+ | 5.29 | Steve Rogers | 91.7 | WAS |
| +025+ | 4.76 | Dave Roberts | 206 | HOU |
| +032+ | 4.55 | Fred Beene | 89 | NYA |
| +033+ | 4.38 | Rick Reuschel | 214 | CHN |
| +034+ | 4.3 | Ron Bryant | 240.3 | SFN |
| +035+ | 4.24 | Steve Renko | 209.3 | WAS |
| +037+ | 4.16 | Jack Billingham | 248.3 | CIN |
| +038+ | 4.1 | Andy Messersmith | 223.7 | LAN |
| +039+ | 4.06 | Nelson Briles | 195.7 | PIT |
| +040+ | 4.06 | Dave McNally | 224.3 | BAL |
| +041+ | 3.97 | Bob Reynolds | 97 | BAL |
| +042+ | 3.96 | Jerry Koosman | 221.3 | NYN |
| +044+ | 3.91 | Bob Gibson | 189 | SLN |
| +045+ | 3.85 | Stan Bahnsen | 257.3 | CHA |
| +046+ | 3.8 | Mel Stottlemyre | 236.3 | NYA |
| +051+ | 3.68 | Bill Singer | 261.3 | ANA |
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