| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mike Scott | HOU | 5.57 | 198908050_HOU_SFN |
| Bryn Smith | WAS | 5.3 | 198908040_WAS_NYN |
| Mike Moore | OAK | 4.6 | 198908050_OAK_SEA |
| Bret Saberhagen | KCA | 3.77 | 198908060_KCA_MIN |
| Chuck Finley | ANA | 3.33 | 198908040_ANA_MIL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bob Knepper | SFN | -6.2 | 198908060_HOU_SFN |
| Storm Davis | OAK | -3.35 | 198908060_OAK_SEA |
| Dave Schmidt | BAL | -2.85 | 198908040_TEX_BAL |
| Jerry Reuss | MIL | -1.99 | 198908040_ANA_MIL |
| Don Carman | PHI | -1.59 | 198908060_PHI_SLN |
Based on accumulated WAA for this season up to 1989-08-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +005+ | 5.36 | Bert Blyleven | 163.3 | ANA |
| +006+ | 5.11 | John Smoltz | 172.3 | ATL |
| +007+ | 5.05 | Orel Hershiser | 175 | LAN |
| +008+ | 4.8 | Chuck Finley | 159.3 | ANA |
| +009+ | 4.75 | Chris Bosio | 174 | MIL |
| +010+ | 4.73 | Mike Moore | 165.3 | OAK |
| +011+ | 4.68 | Mark Langston | 183.3 | TOT |
| +015+ | 4.52 | Rick Reuschel | 154 | SFN |
| +017+ | 4.44 | John Cerutti | 145.3 | TOR |
| +020+ | 4.24 | Bryn Smith | 150.7 | WAS |
| +021+ | 4.18 | Bret Saberhagen | 166.7 | KCA |
| +023+ | 4.08 | Scott Garrelts | 134.3 | SFN |
| +027+ | 3.82 | Greg Swindell | 153.3 | CLE |
| +028+ | 3.63 | John Smiley | 164.7 | PIT |
| +029+ | 3.62 | Mike Scott | 166.7 | HOU |
| +034+ | 3.52 | Ed Whitson | 162.3 | SDN |
| +037+ | 3.44 | Sid Fernandez | 141.7 | NYN |
| +039+ | 3.39 | Kevin Brown | 162.7 | TEX |
| +041+ | 3.27 | Mike Morgan | 132 | LAN |
| +043+ | 3.18 | Mike Bielecki | 141.3 | CHN |
| +045+ | 3.13 | Greg Maddux | 153 | CHN |
| +049+ | 2.94 | Dennis Martinez | 165 | WAS |
| +058+ | 2.71 | Doug Drabek | 163.7 | PIT |
| +060+ | 2.68 | Kirk McCaskill | 137.3 | ANA |
| +062+ | 2.62 | Bruce Hurst | 171.3 | SDN |
_