| Team | Tm | Tier | Game |
|---|---|---|---|
| New York Mets | NYN | 4.54 | 199005200_NYN_SDN |
| Oakland Athletics | OAK | 3.95 | 199005200_OAK_MIL |
| Cincinnati Reds | CIN | 2.52 | 199005200_SLN_CIN |
| Kansas City Royals | KCA | 1.9 | 199005190_KCA_NYA |
| Toronto Blue Jays | TOR | 1.03 | 199005190_ANA_TOR |
| Team | Tm | Tier | Game |
|---|---|---|---|
| California Angels | ANA | -3.11 | 199005200_ANA_TOR |
| Atlanta Braves | ATL | -2.49 | 199005190_PIT_ATL |
| Chicago Cubs | CHN | -1.89 | 199005180_CHN_HOU |
| Philadelphia Phillies | PHI | -1.31 | 199005200_PHI_LAN |
| Montreal Expos | WAS | -1.04 | 199005190_WAS_SFN |
Based on accumulated WAA for this season up to 1990-05-20.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +013+ | 2.01 | Juan Agosto | 25 | HOU |
| +020+ | 1.79 | Gregg Olson | 22.3 | BAL |
| +024+ | 1.68 | Doug Jones | 23 | CLE |
| +025+ | 1.63 | Greg Harris | 27.3 | SDN |
| +030+ | 1.59 | Paul Assenmacher | 31.3 | CHN |
| +037+ | 1.49 | Mark Eichhorn | 28.3 | ANA |
| +044+ | 1.35 | Danny Darwin | 22.3 | HOU |
| +049+ | 1.32 | Dennis Eckersley | 15 | OAK |
| +050+ | 1.28 | Jeff Brantley | 26 | SFN |
| +053+ | 1.26 | Larry Andersen | 21.3 | HOU |
| +052+ | 1.26 | Rob Dibble | 21.3 | CIN |
| +056+ | 1.25 | Bill Sampen | 18.7 | WAS |
| XXXXX | 1.24 | Bill Landrum | 20.7 | PIT |
| XXXXX | 1.15 | Jim Acker | 29 | TOR |
| XXXXX | 1.11 | Lee Smith | 24 | TOT |
| XXXXX | 1.08 | Dan Schatzeder | 24 | HOU |
| XXXXX | 1.07 | Jeff Montgomery | 31 | KCA |
| XXXXX | 1.06 | Darrel Akerfelds | 14 | PHI |
| XXXXX | 1.06 | Willie Blair | 18.7 | TOR |
| XXXXX | 1.03 | Duane Ward | 30 | TOR |
| XXXXX | 1.02 | Edwin Nunez | 25.3 | DET |
| XXXXX | 1 | Mike Schooler | 20.3 | SEA |
| XXXXX | 0.98 | Rick Honeycutt | 16 | OAK |
| XXXXX | 0.97 | Gene Nelson | 20.7 | OAK |
| XXXXX | 0.93 | Barry Jones | 17.7 | CHA |
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