| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.93 | 199005260_CLE_OAK |
| New York Mets | NYN | 2.1 | 199005270_SDN_NYN |
| Kansas City Royals | KCA | 1.61 | 199005260_NYA_KCA |
| New York Yankees | NYA | 1.61 | 199005260_NYA_KCA |
| Cincinnati Reds | CIN | 1.45 | 199005270_CIN_WAS |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -3.44 | 199005260_ATL_PHI |
| California Angels | ANA | -2.74 | 199005250_MIL_ANA |
| Chicago Cubs | CHN | -2.27 | 199005270_HOU_CHN |
| Texas Rangers | TEX | -1.27 | 199005260_BAL_TEX |
| Philadelphia Phillies | PHI | -0.83 | 199005250_ATL_PHI |
Based on accumulated WAA for this season up to 1990-05-27.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +017+ | 2.17 | Gregg Olson | 26.3 | BAL |
| +020+ | 2.06 | Mark Eichhorn | 34.7 | ANA |
| +021+ | 2.01 | Juan Agosto | 29.3 | HOU |
| +024+ | 1.95 | Jeff Brantley | 33 | SFN |
| +026+ | 1.92 | Tim Leary | 59.7 | NYA |
| +030+ | 1.88 | Doug Jones | 24.7 | CLE |
| +029+ | 1.88 | Paul Assenmacher | 37 | CHN |
| +041+ | 1.56 | Jim Acker | 33.3 | TOR |
| +044+ | 1.52 | Greg Harris | 32.3 | SDN |
| +046+ | 1.52 | Dennis Eckersley | 19.3 | OAK |
| +047+ | 1.51 | Bill Landrum | 23.3 | PIT |
| +049+ | 1.47 | Danny Darwin | 23.3 | HOU |
| +052+ | 1.44 | Jeff Montgomery | 34.3 | KCA |
| +051+ | 1.44 | Rob Dibble | 25.7 | CIN |
| +053+ | 1.42 | Mark Williamson | 27.3 | BAL |
| +055+ | 1.4 | Lee Smith | 29 | TOT |
| +057+ | 1.37 | Bill Sampen | 22 | WAS |
| +062+ | 1.35 | Larry Andersen | 26.7 | HOU |
| XXXXX | 1.24 | Wayne Edwards | 23 | CHA |
| XXXXX | 1.22 | Rick Honeycutt | 18.3 | OAK |
| XXXXX | 1.2 | Mike Schooler | 22.3 | SEA |
| XXXXX | 1.15 | Wally Whitehurst | 19.7 | NYN |
| XXXXX | 1.15 | Barry Jones | 22 | CHA |
| XXXXX | 1.14 | Terry Leach | 26 | MIN |
| XXXXX | 1.13 | Craig Lefferts | 21.3 | SDN |
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