| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rick Reuschel | SFN | 8.44 | 198907010_CHN_SFN |
| Mark Gubicza | KCA | 5.99 | 198907030_KCA_OAK |
| Doug Drabek | PIT | 5.4 | 198907020_PIT_LAN |
| Roger Clemens | BOS | 4.83 | 198907020_BOS_TOR |
| Dwight Gooden | NYN | 3.45 | 198907010_NYN_CIN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Bobby Witt | TEX | -6.35 | 198907010_SEA_TEX |
| Mike Smithson | BOS | -3.33 | 198907030_BOS_TOR |
| Bruce Ruffin | PHI | -2.66 | 198907010_ATL_PHI |
| Storm Davis | OAK | -1.94 | 198907020_OAK_CLE |
| Rich Dotson | CHA | -1.82 | 198907010_KCA_CHA |
Based on accumulated WAA for this season up to 1989-07-03.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 4.73 | John Smoltz | 126 | ATL |
| +003+ | 4.63 | Rick Reuschel | 133 | SFN |
| +006+ | 4.41 | Mike Morgan | 109 | LAN |
| +007+ | 4.33 | Mark Gubicza | 153.3 | KCA |
| +009+ | 4.16 | Bert Blyleven | 116.7 | ANA |
| +010+ | 4.03 | Bryn Smith | 113.3 | WAS |
| +011+ | 3.92 | Mike Moore | 123 | OAK |
| +015+ | 3.63 | Chuck Finley | 115.3 | ANA |
| +016+ | 3.52 | Doug Drabek | 119 | PIT |
| +018+ | 3.38 | Orel Hershiser | 127 | LAN |
| +019+ | 3.32 | Mike Scott | 129.3 | HOU |
| +020+ | 3.26 | Dennis Martinez | 126.3 | WAS |
| +027+ | 2.96 | Ed Whitson | 116.3 | SDN |
| +029+ | 2.87 | Bret Saberhagen | 114.3 | KCA |
| +030+ | 2.83 | Greg Swindell | 126 | CLE |
| +034+ | 2.78 | John Cerutti | 111 | TOR |
| +035+ | 2.74 | Todd Burns | 58.3 | OAK |
| +036+ | 2.67 | Chris Bosio | 122.3 | MIL |
| +043+ | 2.57 | Mark Langston | 136.3 | TOT |
| +046+ | 2.43 | Mike Bielecki | 94.3 | CHN |
| +049+ | 2.42 | Bob Welch | 98.3 | OAK |
| +054+ | 2.32 | Kevin Brown | 108.7 | TEX |
| +055+ | 2.31 | Scott Garrelts | 108.3 | SFN |
| +056+ | 2.3 | Bruce Hurst | 128.3 | SDN |
| +063+ | 2.22 | Roger Clemens | 132.3 | BOS |
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