| Starter | Tm | Tier | Game |
|---|---|---|---|
| Greg Maddux | ATL | 12.13 | 199809080_ATL_WAS |
| Kevin Brown | SDN | 8.11 | 199809100_LAN_SDN |
| Pedro Martinez | BOS | 5.28 | 199809080_NYA_BOS |
| Al Leiter | NYN | 4.27 | 199809100_NYN_PHI |
| Curt Schilling | PHI | 3.12 | 199809090_NYN_PHI |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| John Burkett | TEX | -4.18 | 199809080_KCA_TEX |
| Bobby Witt | SLN | -2.62 | 199809090_SLN_CIN |
| Darryl Kile | COL | -2.24 | 199809100_MIA_COL |
| Jason Bere | CIN | -1.52 | 199809080_CIN_HOU |
| Seth Greisinger | DET | -1.21 | 199809090_DET_CHA |
Based on accumulated WAA for this season up to 1998-09-10.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 12.31 | Greg Maddux | 232.7 | ATL |
| +002+ | 11.35 | Kevin Brown | 236 | SDN |
| +006+ | 9.04 | Tom Glavine | 209.3 | ATL |
| +008+ | 8.73 | Roger Clemens | 206 | TOR |
| +009+ | 8.63 | Pedro Martinez | 213.3 | BOS |
| +012+ | 8.15 | Al Leiter | 172.7 | NYN |
| +020+ | 7.14 | Kenny Rogers | 210.7 | OAK |
| +025+ | 6.53 | Chuck Finley | 204.7 | ANA |
| +026+ | 6.52 | Curt Schilling | 243.7 | PHI |
| +027+ | 6.16 | Dustin Hermanson | 170.7 | WAS |
| +035+ | 5.59 | Randy Johnson | 223 | TOT |
| +039+ | 5.51 | Andy Ashby | 214 | SDN |
| +043+ | 5.45 | Francisco Cordova | 200.3 | PIT |
| +046+ | 5.25 | David Wells | 198 | NYA |
| +047+ | 5.24 | Pete Harnisch | 189 | CIN |
| +049+ | 5.21 | Omar Daal | 141.7 | ARI |
| +050+ | 5.2 | Rick Reed | 195 | NYN |
| +054+ | 4.83 | Jamie Moyer | 212.3 | SEA |
| +056+ | 4.7 | John Smoltz | 149.7 | ATL |
| +060+ | 4.48 | Brian Bohanon | 126.7 | TOT |
| +063+ | 4.38 | Matt Morris | 86.3 | SLN |
| +067+ | 4.28 | Mike Mussina | 177.3 | BAL |
| +072+ | 4.03 | Jose Lima | 213.3 | HOU |
| +073+ | 4.01 | David Cone | 188 | NYA |
| +085+ | 3.65 | Mike Hampton | 185 | HOU |
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