| Starter | Tm | Tier | Game |
|---|---|---|---|
| Tom Seaver | NYN | 15.61 | 197309080_NYN_WAS |
| Bert Blyleven | MIN | 7.93 | 197309090_CHA_MIN |
| Jim Palmer | BAL | 6 | 197309080_BAL_CLE |
| 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 |
| Steve Arlin | SDN | -3 | 197309070_SDN_LAN |
| Dave Goltz | MIN | -2.48 | 197309080_CHA_MIN |
| Johnny Odom | OAK | -1.14 | 197309070_OAK_TEX |
| Mike Torrez | WAS | -1.04 | 197309072_NYN_WAS |
Based on accumulated WAA for this season up to 1973-09-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 11.85 | Tom Seaver | 259 | NYN |
| +005+ | 7.67 | Bert Blyleven | 282 | MIN |
| +007+ | 7.46 | Jim Palmer | 262.3 | BAL |
| +008+ | 7.36 | Don Sutton | 231.7 | LAN |
| +012+ | 6.16 | Wayne Twitchell | 211 | PHI |
| +013+ | 6.08 | Ken Holtzman | 269 | OAK |
| +014+ | 6.07 | Steve Rogers | 100.7 | WAS |
| +017+ | 5.79 | Nolan Ryan | 279 | ANA |
| +022+ | 5.2 | Bill Lee | 252 | BOS |
| +027+ | 4.86 | Terry Forster | 142.3 | CHA |
| +031+ | 4.59 | Fred Beene | 89 | NYA |
| +032+ | 4.57 | Dave Roberts | 212.3 | HOU |
| +033+ | 4.55 | Steve Renko | 215.3 | WAS |
| +035+ | 4.48 | Jack Billingham | 255.3 | CIN |
| +036+ | 4.47 | Rick Reuschel | 214 | CHN |
| +037+ | 4.31 | Dave McNally | 233.3 | BAL |
| +039+ | 4.3 | Andy Messersmith | 232.7 | LAN |
| +040+ | 4.29 | Jerry Koosman | 227.3 | NYN |
| +041+ | 4.23 | Nelson Briles | 201.3 | PIT |
| +043+ | 4.02 | Bob Gibson | 189 | SLN |
| +044+ | 4.02 | Bob Reynolds | 97 | BAL |
| +045+ | 3.97 | Stan Bahnsen | 257.3 | CHA |
| +048+ | 3.66 | Bill Singer | 266.7 | ANA |
| +054+ | 3.51 | Ron Bryant | 244.7 | SFN |
| +064+ | 3.26 | Ross Grimsley | 217 | CIN |
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