| Team | Tm | Tier | Game |
|---|---|---|---|
| New York Mets | NYN | 4.54 | 199005200_NYN_SDN |
| Oakland Athletics | OAK | 4.07 | 199005210_OAK_TOR |
| 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 | -2.81 | 199005210_SLN_ATL |
| Chicago Cubs | CHN | -1.89 | 199005190_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 1990-05-21.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +012+ | 2.18 | Juan Agosto | 27 | HOU |
| +021+ | 1.79 | Gregg Olson | 22.3 | BAL |
| +025+ | 1.72 | Paul Assenmacher | 32.7 | CHN |
| +027+ | 1.69 | Doug Jones | 23 | CLE |
| +029+ | 1.65 | Greg Harris | 27.3 | SDN |
| +031+ | 1.63 | Mark Eichhorn | 29.7 | ANA |
| +038+ | 1.47 | Jeff Brantley | 28 | SFN |
| +042+ | 1.41 | Dennis Eckersley | 16 | OAK |
| +044+ | 1.39 | Rob Dibble | 22.7 | CIN |
| +045+ | 1.35 | Danny Darwin | 22.3 | HOU |
| +054+ | 1.26 | Larry Andersen | 21.3 | HOU |
| +055+ | 1.26 | Bill Sampen | 18.7 | WAS |
| +056+ | 1.25 | Jim Acker | 30 | TOR |
| XXXXX | 1.24 | Bill Landrum | 20.7 | PIT |
| XXXXX | 1.12 | Lee Smith | 24 | TOT |
| XXXXX | 1.09 | Barry Jones | 19.3 | CHA |
| XXXXX | 1.09 | Jeff Montgomery | 31 | KCA |
| XXXXX | 1.07 | Dan Schatzeder | 24 | HOU |
| XXXXX | 1.06 | Willie Blair | 18.7 | TOR |
| XXXXX | 1.06 | Darrel Akerfelds | 14 | PHI |
| XXXXX | 1.04 | Duane Ward | 30 | TOR |
| XXXXX | 1.03 | Edwin Nunez | 25.3 | DET |
| XXXXX | 1.02 | Rick Honeycutt | 16.3 | OAK |
| XXXXX | 1.01 | Mike Schooler | 20.3 | SEA |
| XXXXX | 0.98 | Gene Nelson | 20.7 | OAK |
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