| Starter | Tm | Tier | Game |
|---|---|---|---|
| Roger Clemens | BOS | 7.07 | 198906050_BOS_DET |
| Mike Scott | HOU | 6.58 | 198906070_SDN_HOU |
| Dwight Gooden | NYN | 6.58 | 198906070_NYN_CHN |
| Rick Reuschel | SFN | 6.57 | 198906062_SFN_CIN |
| Mark Gubicza | KCA | 6.21 | 198906070_KCA_SEA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bobby Witt | TEX | -4.29 | 198906050_CHA_TEX |
| Andy Hawkins | NYA | -3.32 | 198906050_BAL_NYA |
| Melido Perez | CHA | -3.2 | 198906060_CHA_TEX |
| Rich Yett | CLE | -2.38 | 198906060_CLE_ANA |
| Bill Swift | SEA | -1.77 | 198906070_KCA_SEA |
Based on accumulated WAA for this season up to 1989-06-07.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 3.65 | Kirk McCaskill | 80 | ANA |
| +004+ | 3.5 | Chuck Finley | 85.7 | ANA |
| +005+ | 3.46 | Mike Morgan | 73.3 | LAN |
| +006+ | 3.33 | Mike Moore | 87.7 | OAK |
| +007+ | 2.97 | Ed Whitson | 91.3 | SDN |
| +009+ | 2.91 | Rick Reuschel | 94.7 | SFN |
| +013+ | 2.83 | Greg Swindell | 95.7 | CLE |
| +017+ | 2.62 | Bert Blyleven | 80.3 | ANA |
| +018+ | 2.56 | Mark Gubicza | 112.3 | KCA |
| +020+ | 2.55 | Jeff Ballard | 72.3 | BAL |
| +023+ | 2.5 | Mike Scott | 97.3 | HOU |
| +024+ | 2.38 | Orel Hershiser | 91 | LAN |
| +029+ | 2.27 | Mike Bielecki | 61 | CHN |
| +032+ | 2.22 | John Smoltz | 89.3 | ATL |
| +034+ | 2.2 | Bryn Smith | 75.3 | WAS |
| +035+ | 2.17 | Dwight Gooden | 93 | NYN |
| +038+ | 2.13 | Doug Drabek | 78.7 | PIT |
| +041+ | 2.06 | Ken Hill | 75.7 | SLN |
| +044+ | 1.98 | Todd Burns | 42.7 | OAK |
| +046+ | 1.95 | Derek Lilliquist | 61 | ATL |
| +047+ | 1.94 | Chris Bosio | 90.3 | MIL |
| +048+ | 1.93 | Scott Garrelts | 83 | SFN |
| +051+ | 1.82 | Bob Welch | 89.7 | OAK |
| +056+ | 1.7 | Kevin Brown | 78.7 | TEX |
| +054+ | 1.7 | Bret Saberhagen | 87.3 | KCA |
_