| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mike Scott | HOU | 6.78 | 198905230_CHN_HOU |
| Roger Clemens | BOS | 6.61 | 198905210_BOS_OAK |
| Rick Reuschel | SFN | 6.51 | 198905230_WAS_SFN |
| Dwight Gooden | NYN | 5.6 | 198905230_NYN_SDN |
| Mark Gubicza | KCA | 3.93 | 198905210_KCA_DET |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Rich Yett | CLE | -2 | 198905210_CLE_BAL |
| Melido Perez | CHA | -1.95 | 198905210_TOR_CHA |
| Shane Rawley | MIN | -1.29 | 198905230_MIN_TOR |
| Bill Wegman | MIL | -0.9 | 198905210_MIL_ANA |
| Bill Swift | SEA | -0.88 | 198905230_SEA_BOS |
Based on accumulated WAA for this season up to 1989-05-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.13 | Orel Hershiser | 72 | LAN |
| +003+ | 2.93 | Kirk McCaskill | 64 | ANA |
| +004+ | 2.89 | Mike Morgan | 51.7 | LAN |
| +006+ | 2.76 | Jose Rijo | 57.3 | CIN |
| +007+ | 2.67 | Rick Reuschel | 74.3 | SFN |
| +009+ | 2.56 | Mike Moore | 61 | OAK |
| +011+ | 2.47 | Dwight Gooden | 74 | NYN |
| +012+ | 2.45 | John Smoltz | 67 | ATL |
| +015+ | 2.32 | Mike Bielecki | 46.3 | CHN |
| +017+ | 2.2 | Bert Blyleven | 65.3 | ANA |
| +020+ | 2.14 | Chuck Finley | 59.7 | ANA |
| +023+ | 2.06 | Doug Drabek | 63 | PIT |
| +024+ | 2.02 | Tim Belcher | 61.3 | LAN |
| +026+ | 2 | Ed Whitson | 67.7 | SDN |
| +028+ | 1.94 | John Smiley | 69 | PIT |
| +033+ | 1.86 | Bryn Smith | 53.3 | WAS |
| +034+ | 1.85 | Ken Hill | 51.7 | SLN |
| +036+ | 1.79 | Jeff Ballard | 53.3 | BAL |
| +039+ | 1.71 | Mike Scott | 74 | HOU |
| +040+ | 1.69 | Jimmy Key | 75 | TOR |
| +043+ | 1.56 | Bret Saberhagen | 75.7 | KCA |
| +046+ | 1.51 | Rick Mahler | 72.3 | CIN |
| +053+ | 1.46 | Tom Glavine | 55.7 | ATL |
| +059+ | 1.41 | Mark Gubicza | 86.3 | KCA |
| +065+ | 1.31 | Greg Swindell | 70.7 | CLE |
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