| Starter | Tm | Tier | Game |
|---|---|---|---|
| Steve Carlton | PHI | 9.72 | 197209200_PHI_SLN |
| Jim Palmer | BAL | 9.58 | 197209201_BAL_BOS |
| Wilbur Wood | CHA | 7.47 | 197209200_CHA_OAK |
| Nolan Ryan | ANA | 3.29 | 197209210_KCA_ANA |
| Mickey Lolich | DET | 3.22 | 197209191_DET_CLE |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Don Carrithers | SFN | -3.09 | 197209200_SFN_CIN |
| George Stone | ATL | -2.8 | 197209200_HOU_ATL |
| Jerry Koosman | NYN | -1.6 | 197209190_PIT_NYN |
| Wayne Twitchell | PHI | -1.3 | 197209210_PHI_SLN |
| Bill Parsons | MIL | -1.18 | 197209190_NYA_MIL |
Based on accumulated WAA for this season up to 1972-09-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 9.23 | Steve Carlton | 320.3 | PHI |
| +004+ | 9.07 | Gaylord Perry | 313.7 | CLE |
| +008+ | 8.07 | Jim Palmer | 256 | BAL |
| +011+ | 7.37 | Jim Hunter | 273.3 | OAK |
| +015+ | 7.14 | Wilbur Wood | 356.7 | CHA |
| +018+ | 6.07 | Steve Kline | 215 | NYA |
| +019+ | 5.97 | Don Sutton | 243.7 | LAN |
| +023+ | 5.47 | Nolan Ryan | 257.3 | ANA |
| +027+ | 5.02 | Mickey Lolich | 297.3 | DET |
| +029+ | 4.94 | Luis Tiant | 153.7 | BOS |
| +033+ | 4.76 | Steve Blass | 238 | PIT |
| +036+ | 4.68 | Bob Gibson | 251 | SLN |
| +037+ | 4.65 | Gary Nolan | 171 | CIN |
| +041+ | 4.4 | Jon Matlack | 220.7 | NYN |
| +042+ | 4.4 | Pat Dobson | 257.3 | BAL |
| +048+ | 4.16 | Joe Coleman | 264.7 | DET |
| +051+ | 3.94 | Roger Nelson | 155.3 | KCA |
| +052+ | 3.87 | Mike Cuellar | 234.3 | BAL |
| +055+ | 3.66 | Mike Paul | 148.3 | TEX |
| +058+ | 3.6 | Ken Holtzman | 248.3 | OAK |
| +063+ | 3.32 | Dick Woodson | 229.7 | MIN |
| +065+ | 3.23 | Johnny Odom | 179.3 | OAK |
| +068+ | 3.13 | Claude Osteen | 225.7 | LAN |
| +067+ | 3.13 | Jim McAndrew | 146 | NYN |
| +069+ | 3.12 | Jim Kaat | 113.3 | MIN |
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