| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rick Reuschel | SFN | 7.07 | 198906020_SFN_ATL |
| Dwight Gooden | NYN | 5.47 | 198906020_PIT_NYN |
| Mike Scott | HOU | 5.31 | 198906020_LAN_HOU |
| Mark Gubicza | KCA | 4.56 | 198906020_KCA_ANA |
| Bob Walk | PIT | 2.35 | 198906030_PIT_NYN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Melido Perez | CHA | -2.31 | 198906020_MIN_CHA |
| Rich Dotson | NYA | -1.53 | 198906030_NYA_MIL |
| Bob Knepper | HOU | -1.09 | 198906030_LAN_HOU |
| Bill Swift | SEA | -1.08 | 198906020_TEX_SEA |
| Mike Trujillo | DET | -0.88 | 198906020_BAL_DET |
Based on accumulated WAA for this season up to 1989-06-03.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 3.6 | Kirk McCaskill | 80 | ANA |
| +004+ | 3.29 | Mike Morgan | 66.3 | LAN |
| +005+ | 2.9 | Chuck Finley | 76.7 | ANA |
| +009+ | 2.72 | Dwight Gooden | 88 | NYN |
| +010+ | 2.7 | Mark Gubicza | 104.3 | KCA |
| +012+ | 2.66 | Doug Drabek | 77.3 | PIT |
| +013+ | 2.65 | Ed Whitson | 83.3 | SDN |
| +016+ | 2.62 | Bryn Smith | 68.3 | WAS |
| +018+ | 2.52 | Mike Moore | 78.7 | OAK |
| +019+ | 2.4 | John Smoltz | 82 | ATL |
| +021+ | 2.35 | Orel Hershiser | 91 | LAN |
| +023+ | 2.33 | Jeff Ballard | 65.3 | BAL |
| +024+ | 2.31 | Rick Reuschel | 86 | SFN |
| +025+ | 2.26 | Mike Scott | 89 | HOU |
| +027+ | 2.24 | Mike Bielecki | 61 | CHN |
| +029+ | 2.19 | Jose Rijo | 68.7 | CIN |
| +031+ | 2.12 | Bert Blyleven | 72.3 | ANA |
| +033+ | 2.03 | Scott Garrelts | 75 | SFN |
| +035+ | 2 | Chris Bosio | 84.3 | MIL |
| +036+ | 1.98 | Greg Swindell | 86.7 | CLE |
| +042+ | 1.85 | Todd Burns | 41.3 | OAK |
| +049+ | 1.73 | Doyle Alexander | 85 | DET |
| +050+ | 1.69 | Bret Saberhagen | 87.3 | KCA |
| +058+ | 1.58 | Rick Mahler | 91.3 | CIN |
| +059+ | 1.57 | John Smiley | 82 | PIT |
_