| Starter | Tm | Tier | Game |
|---|---|---|---|
| Pedro Martinez | BOS | 6.22 | 199805140_BOS_MIN |
| Tom Glavine | ATL | 4.97 | 199805130_ATL_SLN |
| Roger Clemens | TOR | 4.68 | 199805130_OAK_TOR |
| Mike Hampton | HOU | 2.26 | 199805130_PIT_HOU |
| Andy Ashby | SDN | 2.18 | 199805141_NYN_SDN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Castillo | DET | -2.99 | 199805150_OAK_DET |
| Jeff Suppan | ARI | -2.82 | 199805150_PIT_ARI |
| Doug Drabek | BAL | -2.21 | 199805130_CLE_BAL |
| Dennis Springer | TBA | -1.61 | 199805140_KCA_TBA |
| Allen Watson | ANA | -1.51 | 199805130_ANA_CHA |
Based on accumulated WAA for this season up to 1998-05-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 4.01 | Curt Schilling | 69 | PHI |
| +002+ | 4.01 | Pedro Martinez | 65.3 | BOS |
| +004+ | 3.58 | Greg Maddux | 65 | ATL |
| +006+ | 3.19 | Mike Hampton | 65.7 | HOU |
| +009+ | 3.16 | Andy Ashby | 64.7 | SDN |
| +010+ | 3.14 | Al Leiter | 45.3 | NYN |
| +012+ | 2.79 | Kevin Brown | 61 | SDN |
| +013+ | 2.76 | Francisco Cordova | 60.7 | PIT |
| +014+ | 2.74 | Roger Clemens | 49.3 | TOR |
| +018+ | 2.47 | Chuck Finley | 62.3 | ANA |
| +019+ | 2.45 | Hideki Irabu | 32.3 | NYA |
| +020+ | 2.34 | Tom Glavine | 51 | ATL |
| +022+ | 2.31 | Mike Mussina | 50 | BAL |
| +023+ | 2.17 | Jamie Moyer | 62.7 | SEA |
| +025+ | 2.15 | Todd Stottlemyre | 62.7 | SLN |
| +026+ | 2.1 | Bartolo Colon | 53.7 | CLE |
| +028+ | 2.05 | Pete Harnisch | 62.3 | CIN |
| +032+ | 2.01 | John Smoltz | 39.7 | ATL |
| +031+ | 2.01 | Jose Lima | 60.3 | HOU |
| +036+ | 1.98 | Pat Rapp | 53.3 | KCA |
| +038+ | 1.95 | Brett Tomko | 57.3 | CIN |
| +041+ | 1.92 | Jimmy Key | 56.3 | BAL |
| +044+ | 1.85 | Masato Yoshii | 43 | NYN |
| +046+ | 1.82 | Aaron Sele | 56.7 | TEX |
| +047+ | 1.8 | Ramon Martinez | 62 | LAN |
_