| Starter | Tm | Tier | Game |
|---|---|---|---|
| Pedro Martinez | BOS | 5.85 | 199805090_BOS_KCA |
| Tom Glavine | ATL | 5.46 | 199805080_SDN_ATL |
| Andy Pettitte | NYA | 3.51 | 199805090_NYA_MIN |
| Jeff Fassero | SEA | 2.77 | 199805100_TOR_SEA |
| Mike Hampton | HOU | 2.03 | 199805080_HOU_MIL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Frank Castillo | DET | -3.53 | 199805090_DET_ANA |
| Doug Drabek | BAL | -2.32 | 199805080_BAL_TBA |
| Jeff Suppan | ARI | -2.04 | 199805100_ARI_PHI |
| Sterling Hitchcock | SDN | -2.02 | 199805090_SDN_ATL |
| Allen Watson | ANA | -1.47 | 199805080_DET_ANA |
Based on accumulated WAA for this season up to 1998-05-10.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.97 | Curt Schilling | 62 | PHI |
| +003+ | 3.47 | Pedro Martinez | 57.3 | BOS |
| +004+ | 3.26 | Greg Maddux | 59 | ATL |
| +008+ | 2.81 | Francisco Cordova | 54.7 | PIT |
| +011+ | 2.74 | Al Leiter | 37.3 | NYN |
| +012+ | 2.73 | Andy Ashby | 57.7 | SDN |
| +013+ | 2.7 | Chuck Finley | 56 | ANA |
| +014+ | 2.65 | Mike Mussina | 44.7 | BAL |
| +018+ | 2.38 | Mike Hampton | 57 | HOU |
| +019+ | 2.25 | Kevin Brown | 53 | SDN |
| +020+ | 2.2 | Roger Clemens | 41.3 | TOR |
| +025+ | 2.1 | Jose Lima | 54.3 | HOU |
| +024+ | 2.1 | Tom Glavine | 44 | ATL |
| +028+ | 1.93 | Brett Tomko | 50.3 | CIN |
| +029+ | 1.92 | Rick Helling | 49.7 | TEX |
| +031+ | 1.85 | Jimmy Key | 49 | BAL |
| +032+ | 1.83 | Pete Harnisch | 55.3 | CIN |
| +034+ | 1.81 | Hideki Irabu | 25.3 | NYA |
| +036+ | 1.78 | Jeff Fassero | 40.7 | SEA |
| +039+ | 1.68 | Ramon Martinez | 56 | LAN |
| +041+ | 1.65 | Masato Yoshii | 37 | NYN |
| +042+ | 1.64 | Aaron Sele | 51 | TEX |
| +048+ | 1.58 | Ken Hill | 51.3 | ANA |
| +049+ | 1.58 | Brian Meadows | 51.3 | MIA |
| +050+ | 1.58 | Rick Reed | 48.7 | NYN |
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