| Starter | Tm | Tier | Game |
|---|---|---|---|
| Orel Hershiser | LAN | 8.81 | 198906300_PIT_LAN |
| Rick Reuschel | SFN | 8.44 | 198907010_CHN_SFN |
| Mike Scott | HOU | 5.73 | 198906290_HOU_WAS |
| Dennis Martinez | WAS | 3.77 | 198906300_HOU_WAS |
| Bret Saberhagen | KCA | 3.71 | 198906290_KCA_CHA |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bobby Witt | TEX | -6.35 | 198907010_SEA_TEX |
| Melido Perez | CHA | -4.69 | 198906290_KCA_CHA |
| Bill Swift | SEA | -3.14 | 198906300_SEA_TEX |
| Bruce Ruffin | PHI | -2.66 | 198907010_ATL_PHI |
| Andy Hawkins | NYA | -2.1 | 198906300_MIL_NYA |
Based on accumulated WAA for this season up to 1989-07-01.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 4.65 | Rick Reuschel | 133 | SFN |
| +004+ | 4.39 | Mike Morgan | 101 | LAN |
| +008+ | 3.96 | John Smoltz | 116.7 | ATL |
| +009+ | 3.95 | Mike Moore | 123 | OAK |
| +010+ | 3.67 | Bryn Smith | 106.3 | WAS |
| +011+ | 3.64 | Chuck Finley | 115.3 | ANA |
| +012+ | 3.63 | Mark Gubicza | 145.3 | KCA |
| +013+ | 3.63 | Doug Drabek | 112.7 | PIT |
| +015+ | 3.57 | Bert Blyleven | 109.7 | ANA |
| +017+ | 3.39 | Orel Hershiser | 127 | LAN |
| +018+ | 3.32 | Mike Scott | 129.3 | HOU |
| +019+ | 3.28 | Dennis Martinez | 126.3 | WAS |
| +023+ | 2.99 | Ed Whitson | 116.3 | SDN |
| +029+ | 2.87 | Bret Saberhagen | 114.3 | KCA |
| +030+ | 2.86 | Greg Swindell | 126 | CLE |
| +035+ | 2.72 | Todd Burns | 58 | OAK |
| +036+ | 2.7 | Chris Bosio | 122.3 | MIL |
| +039+ | 2.65 | John Cerutti | 104 | TOR |
| +044+ | 2.44 | Bob Welch | 98.3 | OAK |
| +045+ | 2.44 | Mike Bielecki | 94.3 | CHN |
| +051+ | 2.33 | Scott Garrelts | 108.3 | SFN |
| +052+ | 2.33 | Kevin Brown | 108.7 | TEX |
| +055+ | 2.21 | Greg Maddux | 113.7 | CHN |
| +064+ | 2.06 | Kirk McCaskill | 104.3 | ANA |
| +067+ | 1.98 | Bruce Hurst | 119.3 | SDN |
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