| Starter | Tm | Tier | Game |
|---|---|---|---|
| Greg Maddux | ATL | 12.63 | 199809020_HOU_ATL |
| Pedro Martinez | BOS | 5.26 | 199809030_BOS_TOR |
| Al Leiter | NYN | 3.81 | 199809040_ATL_NYN |
| Andy Ashby | SDN | 2.95 | 199809020_NYN_SDN |
| Curt Schilling | PHI | 2.93 | 199809040_PHI_MIL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Pedro Astacio | COL | -4.81 | 199809020_COL_MIL |
| Charles Nagy | CLE | -2.52 | 199809040_CLE_DET |
| Javier Vazquez | WAS | -2.41 | 199809020_WAS_SFN |
| Jason Bere | CIN | -1.76 | 199809020_CIN_CHN |
| Kent Mercker | SLN | -1.25 | 199809020_SLN_MIA |
Based on accumulated WAA for this season up to 1998-09-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 12.54 | Greg Maddux | 225.7 | ATL |
| +004+ | 10.29 | Kevin Brown | 220 | SDN |
| +006+ | 8.75 | Tom Glavine | 203.3 | ATL |
| +008+ | 8.44 | Pedro Martinez | 206 | BOS |
| +009+ | 8.35 | Roger Clemens | 198 | TOR |
| +013+ | 7.81 | Al Leiter | 165.7 | NYN |
| +020+ | 6.58 | Curt Schilling | 237.7 | PHI |
| +026+ | 6.31 | Omar Daal | 137.7 | ARI |
| +027+ | 6.18 | Kenny Rogers | 201.7 | OAK |
| +028+ | 6.05 | Francisco Cordova | 196.3 | PIT |
| +029+ | 6 | Andy Ashby | 209 | SDN |
| +031+ | 5.67 | Chuck Finley | 196.7 | ANA |
| +038+ | 5.4 | Dustin Hermanson | 163.7 | WAS |
| +043+ | 5.19 | David Wells | 190 | NYA |
| +045+ | 5.01 | Rick Reed | 187.3 | NYN |
| +052+ | 4.67 | Randy Johnson | 214 | TOT |
| +053+ | 4.65 | Pete Harnisch | 182 | CIN |
| +063+ | 4.08 | Jamie Moyer | 205.3 | SEA |
| +065+ | 4.07 | Matt Morris | 79.3 | SLN |
| +072+ | 3.87 | Rolando Arrojo | 187.7 | TBA |
| +073+ | 3.82 | Mike Mussina | 169.3 | BAL |
| +076+ | 3.76 | Kerry Wood | 166.7 | CHN |
| +077+ | 3.7 | John Smoltz | 140.7 | ATL |
| +079+ | 3.65 | Jose Lima | 205.3 | HOU |
| +081+ | 3.6 | Denny Neagle | 202.3 | ATL |
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