| Starter | Tm | Tier | Game |
|---|---|---|---|
| Doug Drabek | PIT | 4.69 | 199005110_HOU_PIT |
| Greg Maddux | CHN | 4.07 | 199005110_CHN_CIN |
| Dennis Martinez | WAS | 3.96 | 199005100_LAN_WAS |
| Bryn Smith | SLN | 3.46 | 199005110_ATL_SLN |
| Jim Deshaies | HOU | 3.28 | 199005110_HOU_PIT |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Andy Hawkins | NYA | -2.01 | 199005110_NYA_SEA |
| Todd Stottlemyre | TOR | -1.35 | 199005100_TOR_DET |
| Bill Wegman | MIL | -1.34 | 199005110_MIL_MIN |
| Pete Harnisch | BAL | -1.27 | 199005090_BAL_ANA |
| Storm Davis | KCA | -1.14 | 199005090_KCA_TEX |
Based on accumulated WAA for this season up to 1990-05-11.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 2.73 | Frank Viola | 42.7 | NYN |
| +001+ | 2.73 | Bob Welch | 51 | OAK |
| +003+ | 2.58 | Dave Stewart | 49.3 | OAK |
| +005+ | 2.2 | Dennis Cook | 40.3 | PHI |
| +006+ | 2.1 | Chuck Finley | 40 | ANA |
| +007+ | 2.07 | Ed Whitson | 48 | SDN |
| +009+ | 1.97 | Jack Armstrong | 38.3 | CIN |
| +011+ | 1.93 | Bud Black | 43.7 | CLE |
| +012+ | 1.92 | Chris Bosio | 46.7 | MIL |
| +017+ | 1.76 | Teddy Higuera | 33.3 | MIL |
| +018+ | 1.69 | Dennis Martinez | 52 | WAS |
| +021+ | 1.61 | Doug Drabek | 45.7 | PIT |
| +023+ | 1.57 | Bryn Smith | 49.7 | SLN |
| +025+ | 1.56 | Dave Stieb | 37.7 | TOR |
| +029+ | 1.5 | Mark Gardner | 33.3 | WAS |
| +033+ | 1.37 | Tom Gordon | 29.3 | KCA |
| +036+ | 1.29 | Greg Maddux | 44 | CHN |
| XXXXX | 1.23 | Eric King | 35 | CHA |
| XXXXX | 1.16 | Bill Sampen | 15.3 | WAS |
| XXXXX | 1.15 | Tom Glavine | 41.3 | ATL |
| XXXXX | 1.11 | Mike Morgan | 41.7 | LAN |
| XXXXX | 1.1 | Dan Petry | 32.7 | DET |
| XXXXX | 1.03 | Jim Deshaies | 42.7 | HOU |
| XXXXX | 1.01 | Scott Sanderson | 36 | OAK |
| XXXXX | 0.93 | Pete Smith | 32.3 | ATL |
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