| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rick Reuschel | SFN | 7.07 | 198906020_SFN_ATL |
| Dwight Gooden | NYN | 5.47 | 198906020_PIT_NYN |
| Mike Scott | HOU | 5.31 | 198906020_LAN_HOU |
| Mark Gubicza | KCA | 4.56 | 198906020_KCA_ANA |
| Doug Drabek | PIT | 4.17 | 198906040_PIT_NYN |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Jerry Reuss | CHA | -3.98 | 198906040_MIN_CHA |
| Mike Smithson | BOS | -3.35 | 198906040_TOR_BOS |
| Rich Dotson | NYA | -1.53 | 198906030_NYA_MIL |
| Bob Knepper | HOU | -1.09 | 198906030_LAN_HOU |
| Bill Swift | SEA | -1.08 | 198906020_TEX_SEA |
Based on accumulated WAA for this season up to 1989-06-04.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +003+ | 3.63 | Kirk McCaskill | 80 | ANA |
| +004+ | 3.27 | Mike Morgan | 66.3 | LAN |
| +006+ | 2.93 | Chuck Finley | 76.7 | ANA |
| +009+ | 2.75 | Mark Gubicza | 104.3 | KCA |
| +010+ | 2.75 | Dwight Gooden | 88 | NYN |
| +011+ | 2.69 | Ed Whitson | 83.3 | SDN |
| +013+ | 2.64 | Bryn Smith | 68.3 | WAS |
| +016+ | 2.61 | Bert Blyleven | 80.3 | ANA |
| +017+ | 2.54 | Mike Moore | 78.7 | OAK |
| +020+ | 2.43 | John Smoltz | 82 | ATL |
| +023+ | 2.35 | Rick Reuschel | 86 | SFN |
| +024+ | 2.35 | Jeff Ballard | 65.3 | BAL |
| +025+ | 2.32 | Orel Hershiser | 91 | LAN |
| +026+ | 2.32 | Mike Scott | 90 | HOU |
| +028+ | 2.26 | Mike Bielecki | 61 | CHN |
| +030+ | 2.22 | Jose Rijo | 68.7 | CIN |
| +032+ | 2.18 | Doug Drabek | 78.7 | PIT |
| +035+ | 2.06 | Scott Garrelts | 75 | SFN |
| +036+ | 2.02 | Greg Swindell | 86.7 | CLE |
| +037+ | 2.02 | Chris Bosio | 84.3 | MIL |
| +042+ | 1.95 | Todd Burns | 42.3 | OAK |
| +045+ | 1.94 | Derek Lilliquist | 61 | ATL |
| +049+ | 1.76 | Doyle Alexander | 85 | DET |
| +051+ | 1.73 | Bret Saberhagen | 87.3 | KCA |
| +055+ | 1.61 | John Smiley | 82 | PIT |
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