| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 7.9 | 199005090_NYA_OAK |
| New York Mets | NYN | 4.04 | 199005080_SFN_NYN |
| Houston Astros | HOU | 2.52 | 199005070_HOU_NYN |
| Cincinnati Reds | CIN | 2.35 | 199005070_CIN_SLN |
| Kansas City Royals | KCA | 0.73 | 199005080_KCA_TEX |
| Team | Tm | Tier | Game |
|---|---|---|---|
| San Francisco Giants | SFN | -4.91 | 199005090_SFN_NYN |
| California Angels | ANA | -2.56 | 199005080_BAL_ANA |
| Atlanta Braves | ATL | -1.8 | 199005090_ATL_CHN |
| Detroit Tigers | DET | -1.34 | 199005080_DET_MIL |
| Montreal Expos | WAS | -1.01 | 199005080_LAN_WAS |
Based on accumulated WAA for this season up to 1990-05-09.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 2.55 | Dave Stewart | 49.3 | OAK |
| +022+ | 1.52 | Duane Ward | 21.3 | TOR |
| +024+ | 1.49 | Rob Dibble | 16.7 | CIN |
| +025+ | 1.47 | Juan Agosto | 19.3 | HOU |
| +030+ | 1.4 | Doug Jones | 15.3 | CLE |
| +034+ | 1.28 | Mark Eichhorn | 21.7 | ANA |
| XXXXX | 1.22 | Gregg Olson | 16.3 | BAL |
| XXXXX | 1.2 | Bill Landrum | 15.7 | PIT |
| XXXXX | 1.17 | Ted Power | 13 | PIT |
| XXXXX | 1.14 | Bill Sampen | 15.3 | WAS |
| XXXXX | 1.13 | Greg Harris | 21.7 | SDN |
| XXXXX | 1.12 | Don Carman | 14.7 | PHI |
| XXXXX | 1.11 | Dennis Eckersley | 13 | OAK |
| XXXXX | 1.03 | Mitch Williams | 16 | CHN |
| XXXXX | 0.99 | Jeff Montgomery | 23 | KCA |
| XXXXX | 0.97 | Larry Andersen | 16 | HOU |
| XXXXX | 0.97 | Paul Assenmacher | 24.7 | CHN |
| XXXXX | 0.94 | Dan Schatzeder | 18 | HOU |
| XXXXX | 0.94 | Danny Darwin | 15.7 | HOU |
| XXXXX | 0.94 | Terry Leach | 17.3 | MIN |
| XXXXX | 0.93 | Jeff Reardon | 10.3 | BOS |
| XXXXX | 0.9 | Bob Patterson | 14.7 | PIT |
| XXXXX | 0.86 | Jeff Brantley | 21.3 | SFN |
| XXXXX | 0.85 | Scott Radinsky | 9.7 | CHA |
| XXXXX | 0.84 | Ken Dayley | 9.3 | SLN |
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