| Starter | Tm | Tier | Game |
|---|---|---|---|
| Mark Gubicza | KCA | 5.16 | 198905110_TEX_KCA |
| Mike Scott | HOU | 4.89 | 198905090_WAS_HOU |
| Frank Viola | MIN | 3.46 | 198905090_MIN_BOS |
| Nolan Ryan | TEX | 2.94 | 198905110_TEX_KCA |
| Dave Stewart | OAK | 2.83 | 198905110_OAK_BAL |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Wes Gardner | BOS | -1.69 | 198905090_MIN_BOS |
| Melido Perez | CHA | -1.43 | 198905100_CHA_MIL |
| Dennis Rasmussen | SDN | -1.34 | 198905090_SDN_SLN |
| Don Carman | PHI | -1.02 | 198905090_ATL_PHI |
| Jeff Ballard | BAL | -0.78 | 198905110_OAK_BAL |
Based on accumulated WAA for this season up to 1989-05-11.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 3.37 | Kirk McCaskill | 52 | ANA |
| +002+ | 2.6 | Mike Morgan | 39 | LAN |
| +004+ | 2.24 | Jose Rijo | 44 | CIN |
| +005+ | 2.23 | Mike Bielecki | 35.7 | CHN |
| +008+ | 2.07 | Tom Glavine | 55.7 | ATL |
| +009+ | 2.05 | Bert Blyleven | 51.3 | ANA |
| +014+ | 1.96 | Orel Hershiser | 54 | LAN |
| +019+ | 1.91 | Chris Bosio | 51.7 | MIL |
| +021+ | 1.9 | Ed Whitson | 53.7 | SDN |
| +026+ | 1.74 | Mike Moore | 44.3 | OAK |
| +027+ | 1.72 | Ken Hill | 37.3 | SLN |
| +028+ | 1.7 | Erik Hanson | 46 | SEA |
| +029+ | 1.66 | Doug Drabek | 51 | PIT |
| +030+ | 1.6 | Dwight Gooden | 50.7 | NYN |
| +031+ | 1.6 | Eric King | 51 | CHA |
| +033+ | 1.57 | John Smiley | 45 | PIT |
| +036+ | 1.52 | John Cerutti | 39.7 | TOR |
| +044+ | 1.34 | Greg Swindell | 50 | CLE |
| +046+ | 1.32 | Jeff Ballard | 45.7 | BAL |
| +047+ | 1.26 | John Dopson | 43.3 | BOS |
| XXXXX | 1.25 | John Smoltz | 51 | ATL |
| XXXXX | 1.19 | Roger Clemens | 52.7 | BOS |
| XXXXX | 1.15 | Nolan Ryan | 50.7 | TEX |
| XXXXX | 1.15 | Mike Flanagan | 47.7 | TOR |
| XXXXX | 1.12 | Bryn Smith | 37.3 | WAS |
_