| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jim Palmer | BAL | 5.64 | 197308310_BAL_NYA |
| Wayne Twitchell | PHI | 5.57 | 197309010_WAS_PHI |
| Ken Holtzman | OAK | 5.1 | 197308310_OAK_KCA |
| Bill Lee | BOS | 3.46 | 197309020_BOS_MIL |
| Rick Reuschel | CHN | 2.82 | 197308311_CHN_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Woodie Fryman | DET | -3.23 | 197309010_CLE_DET |
| Jim Lonborg | PHI | -2.87 | 197308310_WAS_PHI |
| Steve Arlin | SDN | -2.31 | 197309020_CIN_SDN |
| Mike Kekich | CLE | -1.93 | 197308310_CLE_DET |
| Mike Torrez | WAS | -1.91 | 197309020_WAS_PHI |
Based on accumulated WAA for this season up to 1973-09-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.12 | Tom Seaver | 242 | NYN |
| +003+ | 7.2 | Don Sutton | 224.7 | LAN |
| +004+ | 7.19 | Bert Blyleven | 266.7 | MIN |
| +010+ | 6.16 | Jim Palmer | 242.3 | BAL |
| +012+ | 5.92 | Ken Holtzman | 258 | OAK |
| +014+ | 5.74 | Wayne Twitchell | 206 | PHI |
| +015+ | 5.49 | Bill Lee | 242.3 | BOS |
| +022+ | 4.98 | Nolan Ryan | 270 | ANA |
| +023+ | 4.93 | Terry Forster | 129.7 | CHA |
| +024+ | 4.92 | Steve Rogers | 83 | WAS |
| +026+ | 4.88 | Rick Reuschel | 211.3 | CHN |
| +028+ | 4.73 | Dave Roberts | 206 | HOU |
| +031+ | 4.52 | Fred Beene | 89 | NYA |
| +034+ | 4.08 | Nelson Briles | 188.7 | PIT |
| +037+ | 3.98 | Dave McNally | 224.3 | BAL |
| +038+ | 3.96 | Andy Messersmith | 223.7 | LAN |
| +039+ | 3.88 | Bob Gibson | 189 | SLN |
| +043+ | 3.71 | Bill Singer | 253 | ANA |
| +045+ | 3.68 | Ron Bryant | 231.7 | SFN |
| +046+ | 3.61 | Jack Billingham | 242.3 | CIN |
| +047+ | 3.57 | Tommy John | 178.7 | LAN |
| +050+ | 3.48 | Steve Renko | 201.3 | WAS |
| +052+ | 3.43 | Jim Colborn | 261.3 | MIL |
| +053+ | 3.4 | Ross Grimsley | 210.7 | CIN |
| +054+ | 3.34 | Bob Reynolds | 90 | BAL |
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