| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wilbur Wood | CHA | 11.42 | 197307060_BOS_CHA |
| Jim Palmer | BAL | 7.58 | 197307061_OAK_BAL |
| Bert Blyleven | MIN | 7.32 | 197307071_NYA_MIN |
| Don Sutton | LAN | 5.92 | 197307060_PIT_LAN |
| Ken Holtzman | OAK | 5.67 | 197307070_OAK_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Dick Bosman | CLE | -2.1 | 197307082_ANA_CLE |
| Steve Busby | KCA | -2.05 | 197307060_DET_KCA |
| Jim Lonborg | PHI | -1.93 | 197307070_CIN_PHI |
| Jim McGlothlin | CIN | -1.43 | 197307070_CIN_PHI |
| Don Carrithers | SFN | -1.16 | 197307070_SLN_SFN |
Based on accumulated WAA for this season up to 1973-07-08.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 6.51 | Ken Holtzman | 174.3 | OAK |
| +004+ | 5.18 | Bill Singer | 177 | ANA |
| +005+ | 5.15 | Wilbur Wood | 218 | CHA |
| +006+ | 5.1 | Tom Seaver | 137.7 | NYN |
| +007+ | 5.01 | Bert Blyleven | 167.7 | MIN |
| +011+ | 4.63 | Wayne Twitchell | 122 | PHI |
| +012+ | 4.31 | Rick Reuschel | 132 | CHN |
| +013+ | 4.21 | Don Sutton | 157 | LAN |
| +014+ | 4.04 | Bill Lee | 138 | BOS |
| +016+ | 3.75 | Rollie Fingers | 66 | OAK |
| +018+ | 3.62 | Dave McNally | 141.7 | BAL |
| +019+ | 3.59 | Ron Bryant | 150.3 | SFN |
| +020+ | 3.45 | Nolan Ryan | 174 | ANA |
| +026+ | 3.08 | Jim Palmer | 135.3 | BAL |
| +029+ | 2.99 | Sonny Siebert | 79.3 | TOT |
| +034+ | 2.82 | Fred Beene | 60.3 | NYA |
| +035+ | 2.8 | Ross Grimsley | 125.3 | CIN |
| +046+ | 2.49 | Jerry Koosman | 131.7 | NYN |
| +047+ | 2.47 | Steve Renko | 116.3 | WAS |
| +049+ | 2.38 | John Curtis | 128.7 | BOS |
| +051+ | 2.38 | Mel Stottlemyre | 150.3 | NYA |
| +054+ | 2.32 | Rick Wise | 140 | SLN |
| +056+ | 2.29 | Jim Colborn | 147.7 | MIL |
| +058+ | 2.21 | Bob Gibson | 146 | SLN |
| +060+ | 2.16 | Doc Medich | 114.7 | NYA |
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