| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 15.61 | 197309080_NYN_WAS |
| Jim Palmer | BAL | 6 | 197309080_BAL_CLE |
| Don Sutton | LAN | 5.77 | 197309060_SDN_LAN |
| Ken Holtzman | OAK | 4.42 | 197309080_OAK_TEX |
| Bill Lee | BOS | 3.05 | 197309080_DET_BOS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Milt Wilcox | CLE | -4.18 | 197309080_BAL_CLE |
| Woodie Fryman | DET | -3.17 | 197309060_DET_CLE |
| Steve Arlin | SDN | -3 | 197309070_SDN_LAN |
| Dave Goltz | MIN | -2.48 | 197309080_CHA_MIN |
| Johnny Odom | OAK | -1.14 | 197309070_OAK_TEX |
Based on accumulated WAA for this season up to 1973-09-08.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.8 | Tom Seaver | 259 | NYN |
| +003+ | 8.12 | Bert Blyleven | 275.7 | MIN |
| +007+ | 7.39 | Jim Palmer | 262.3 | BAL |
| +008+ | 7.32 | Don Sutton | 231.7 | LAN |
| +012+ | 6.12 | Wayne Twitchell | 211 | PHI |
| +013+ | 6.05 | Steve Rogers | 100.7 | WAS |
| +014+ | 6.01 | Ken Holtzman | 269 | OAK |
| +016+ | 5.7 | Nolan Ryan | 279 | ANA |
| +021+ | 5.15 | Bill Lee | 252 | BOS |
| +025+ | 4.83 | Terry Forster | 142.3 | CHA |
| +029+ | 4.57 | Fred Beene | 89 | NYA |
| +032+ | 4.53 | Dave Roberts | 212.3 | HOU |
| +033+ | 4.51 | Steve Renko | 215.3 | WAS |
| +034+ | 4.43 | Jack Billingham | 255.3 | CIN |
| +035+ | 4.43 | Rick Reuschel | 214 | CHN |
| +037+ | 4.25 | Dave McNally | 233.3 | BAL |
| +038+ | 4.24 | Jerry Koosman | 227.3 | NYN |
| +040+ | 4.12 | Andy Messersmith | 223.7 | LAN |
| +041+ | 4.1 | Nelson Briles | 195.7 | PIT |
| +043+ | 3.99 | Bob Reynolds | 97 | BAL |
| +044+ | 3.97 | Bob Gibson | 189 | SLN |
| +045+ | 3.92 | Stan Bahnsen | 257.3 | CHA |
| +047+ | 3.84 | Mel Stottlemyre | 236.3 | NYA |
| +051+ | 3.57 | Bill Singer | 266.7 | ANA |
| +057+ | 3.46 | Ron Bryant | 244.7 | SFN |
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