| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rick Reuschel | SFN | 8.83 | 198907140_PIT_SFN |
| Doug Drabek | PIT | 6.04 | 198907140_PIT_SFN |
| Bret Saberhagen | KCA | 3.99 | 198907141_KCA_NYA |
| Bryn Smith | WAS | 3.82 | 198907140_WAS_CIN |
| John Smoltz | ATL | 2.93 | 198907140_NYN_ATL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Melido Perez | CHA | -4.72 | 198907150_MIL_CHA |
| Kevin Gross | WAS | -2.29 | 198907160_WAS_CIN |
| Mike Boddicker | BOS | -1.39 | 198907140_BOS_MIN |
| Dave Schmidt | BAL | -1.07 | 198907150_ANA_BAL |
| Paul Kilgus | CHN | -0.99 | 198907150_CHN_SDN |
Based on accumulated WAA for this season up to 1989-07-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 5.28 | John Smoltz | 142 | ATL |
| +003+ | 5.09 | Mike Moore | 136 | OAK |
| +005+ | 4.89 | Bryn Smith | 127.7 | WAS |
| +008+ | 4.44 | Rick Reuschel | 145 | SFN |
| +010+ | 4.06 | Bert Blyleven | 131.7 | ANA |
| +011+ | 4.01 | Doug Drabek | 134 | PIT |
| +012+ | 3.95 | Mark Gubicza | 167.3 | KCA |
| +013+ | 3.94 | Chuck Finley | 130.3 | ANA |
| +015+ | 3.87 | Orel Hershiser | 143.3 | LAN |
| +016+ | 3.84 | Mike Morgan | 118 | LAN |
| +017+ | 3.74 | Bret Saberhagen | 135.7 | KCA |
| +021+ | 3.62 | Greg Swindell | 142.7 | CLE |
| +023+ | 3.4 | Ed Whitson | 137.3 | SDN |
| +027+ | 3.3 | Mike Scott | 140.3 | HOU |
| +032+ | 3.06 | John Cerutti | 123.3 | TOR |
| +034+ | 2.86 | Scott Garrelts | 114.3 | SFN |
| +039+ | 2.75 | Scott Bankhead | 125.7 | SEA |
| +042+ | 2.71 | Mark Langston | 150.3 | TOT |
| +044+ | 2.7 | Chris Bosio | 143 | MIL |
| +048+ | 2.57 | Dennis Martinez | 137.3 | WAS |
| +049+ | 2.54 | Greg Maddux | 126.3 | CHN |
| +056+ | 2.44 | Roger Clemens | 146.3 | BOS |
| +059+ | 2.34 | Todd Burns | 65.7 | OAK |
| +060+ | 2.28 | Jose Rijo | 111.3 | CIN |
| +071+ | 2.13 | Sid Fernandez | 110 | NYN |
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