| Starter | Tm | Tier | Game |
|---|---|---|---|
| Orel Hershiser | LAN | 9.03 | 198905310_WAS_LAN |
| Rick Reuschel | SFN | 7.07 | 198906020_SFN_ATL |
| Roger Clemens | BOS | 6.01 | 198905310_OAK_BOS |
| Dwight Gooden | NYN | 5.47 | 198906020_PIT_NYN |
| Mike Scott | HOU | 5.31 | 198906020_LAN_HOU |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bobby Witt | TEX | -3.15 | 198905310_TEX_BAL |
| Andy Hawkins | NYA | -2.71 | 198905310_SEA_NYA |
| Melido Perez | CHA | -2.31 | 198906020_MIN_CHA |
| Rich Yett | CLE | -1.93 | 198905310_TOR_CLE |
| Dennis Rasmussen | SDN | -1.22 | 198905310_PHI_SDN |
Based on accumulated WAA for this season up to 1989-06-02.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 3.65 | Kirk McCaskill | 73 | ANA |
| +004+ | 3.27 | Mike Morgan | 64.3 | LAN |
| +005+ | 2.91 | Chuck Finley | 76.7 | ANA |
| +007+ | 2.82 | Mike Bielecki | 55.3 | CHN |
| +009+ | 2.72 | Dwight Gooden | 88 | NYN |
| +011+ | 2.69 | Mark Gubicza | 104.3 | KCA |
| +013+ | 2.65 | Ed Whitson | 83.3 | SDN |
| +012+ | 2.65 | Doug Drabek | 77.3 | PIT |
| +015+ | 2.63 | Bryn Smith | 68.3 | WAS |
| +017+ | 2.53 | Mike Moore | 78.7 | OAK |
| +020+ | 2.45 | Mike Scott | 89 | HOU |
| +022+ | 2.41 | John Smoltz | 82 | ATL |
| +023+ | 2.33 | Jeff Ballard | 65.3 | BAL |
| +025+ | 2.31 | Rick Reuschel | 86 | SFN |
| +026+ | 2.2 | Jose Rijo | 68.7 | CIN |
| +029+ | 2.12 | Bert Blyleven | 72.3 | ANA |
| +032+ | 2.03 | Scott Garrelts | 75 | SFN |
| +033+ | 2.01 | Chris Bosio | 84.3 | MIL |
| +036+ | 1.97 | Orel Hershiser | 84 | LAN |
| +034+ | 1.97 | Greg Swindell | 86.7 | CLE |
| +041+ | 1.85 | Todd Burns | 41.3 | OAK |
| +045+ | 1.76 | Doyle Alexander | 78 | DET |
| +049+ | 1.71 | Ken Hill | 64.3 | SLN |
| +050+ | 1.68 | Bret Saberhagen | 87.3 | KCA |
| +053+ | 1.57 | Dennis Martinez | 80.7 | WAS |
_