| Starter | Tm | Tier | Game |
|---|---|---|---|
| Orel Hershiser | LAN | 10.39 | 198905140_LAN_PHI |
| Mike Scott | HOU | 4.71 | 198905140_HOU_CHN |
| Frank Viola | MIN | 3.97 | 198905140_TOR_MIN |
| Mark Gubicza | KCA | 3.36 | 198905160_KCA_MIN |
| Dennis Martinez | WAS | 3.01 | 198905140_SFN_WAS |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mike Smithson | BOS | -4.23 | 198905160_BOS_ANA |
| Rich Yett | CLE | -1.8 | 198905160_CLE_TOR |
| Bill Long | CHA | -1.8 | 198905150_CHA_DET |
| Dennis Rasmussen | SDN | -1.47 | 198905140_SDN_NYN |
| Andy Hawkins | NYA | -1.35 | 198905140_NYA_ANA |
Based on accumulated WAA for this season up to 1989-05-16.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.6 | Kirk McCaskill | 60 | ANA |
| +002+ | 3.07 | Mike Morgan | 46.7 | LAN |
| +003+ | 2.82 | Mike Bielecki | 42.7 | CHN |
| +004+ | 2.76 | Orel Hershiser | 63 | LAN |
| +006+ | 2.57 | Jose Rijo | 50.3 | CIN |
| +008+ | 2.3 | Mike Moore | 53.3 | OAK |
| +011+ | 2.2 | Bert Blyleven | 58.3 | ANA |
| +016+ | 2 | Roger Clemens | 61.7 | BOS |
| +018+ | 1.94 | Eric King | 57 | CHA |
| +019+ | 1.93 | Greg Swindell | 59 | CLE |
| +020+ | 1.92 | John Smiley | 54 | PIT |
| +024+ | 1.79 | Dwight Gooden | 58.7 | NYN |
| +026+ | 1.78 | Chris Bosio | 59.3 | MIL |
| +029+ | 1.7 | Ken Hill | 44.7 | SLN |
| +030+ | 1.69 | John Smoltz | 58 | ATL |
| +032+ | 1.68 | Scott Garrelts | 55.3 | SFN |
| +035+ | 1.61 | Ed Whitson | 58.7 | SDN |
| +036+ | 1.56 | Erik Hanson | 51.7 | SEA |
| +037+ | 1.55 | Chuck Finley | 50.7 | ANA |
| +039+ | 1.55 | Mike Scott | 59.3 | HOU |
| +038+ | 1.55 | Doug Drabek | 57 | PIT |
| +042+ | 1.53 | Rick Reuschel | 58.7 | SFN |
| +044+ | 1.52 | Jim Deshaies | 59 | HOU |
| +046+ | 1.49 | Tom Glavine | 55.7 | ATL |
| +048+ | 1.46 | Mark Gubicza | 78.3 | KCA |
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