| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mark Gubicza | KCA | 6.99 | 198907080_CHA_KCA |
| Mike Scott | HOU | 5.53 | 198907090_WAS_HOU |
| Roger Clemens | BOS | 5.41 | 198907070_NYA_BOS |
| Doug Drabek | PIT | 4.73 | 198907070_SDN_PIT |
| Bryn Smith | WAS | 3.69 | 198907080_WAS_HOU |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bobby Witt | TEX | -4.97 | 198907070_TEX_OAK |
| Storm Davis | OAK | -1.77 | 198907070_TEX_OAK |
| Rich Dotson | CHA | -1.52 | 198907070_CHA_KCA |
| Dave Schmidt | BAL | -0.65 | 198907090_BAL_MIL |
| John Farrell | CLE | -0.64 | 198907070_CLE_SEA |
Based on accumulated WAA for this season up to 1989-07-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.08 | Rick Reuschel | 140 | SFN |
| +003+ | 4.97 | John Smoltz | 134 | ATL |
| +004+ | 4.82 | Mike Morgan | 115.3 | LAN |
| +009+ | 4.54 | Bert Blyleven | 125.7 | ANA |
| +010+ | 4.5 | Mike Moore | 130 | OAK |
| +011+ | 4.36 | Mark Gubicza | 161.3 | KCA |
| +012+ | 4.31 | Doug Drabek | 128 | PIT |
| +013+ | 4.22 | Chuck Finley | 124.3 | ANA |
| +014+ | 4.17 | Bryn Smith | 119.3 | WAS |
| +018+ | 3.53 | Orel Hershiser | 135 | LAN |
| +019+ | 3.52 | Ed Whitson | 129.3 | SDN |
| +021+ | 3.37 | Bret Saberhagen | 127.7 | KCA |
| +023+ | 3.35 | Chris Bosio | 137 | MIL |
| +025+ | 3.22 | Mike Scott | 140.3 | HOU |
| +029+ | 3.04 | Greg Swindell | 133.7 | CLE |
| +030+ | 3.03 | Mark Langston | 144.3 | TOT |
| +038+ | 2.77 | Scott Bankhead | 118.7 | SEA |
| +040+ | 2.72 | John Cerutti | 117.3 | TOR |
| +042+ | 2.68 | Dennis Martinez | 131.3 | WAS |
| +043+ | 2.61 | Mike Bielecki | 106 | CHN |
| +052+ | 2.48 | Nolan Ryan | 127 | TEX |
| +053+ | 2.45 | Kevin Brown | 124.3 | TEX |
| +056+ | 2.36 | Bruce Hurst | 135.3 | SDN |
| +055+ | 2.36 | Scott Garrelts | 108.3 | SFN |
| +058+ | 2.34 | Kirk McCaskill | 112.3 | ANA |
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