| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.71 | 199005280_TOR_OAK |
| New York Mets | NYN | 2.27 | 199005290_NYN_CIN |
| Cincinnati Reds | CIN | 2.02 | 199005290_NYN_CIN |
| Kansas City Royals | KCA | 1.79 | 199005290_DET_KCA |
| New York Yankees | NYA | 1.57 | 199005290_NYA_CHA |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -3.34 | 199005270_ATL_PHI |
| California Angels | ANA | -2.38 | 199005270_MIL_ANA |
| Chicago Cubs | CHN | -2.27 | 199005270_HOU_CHN |
| Texas Rangers | TEX | -1.65 | 199005290_BOS_TEX |
| Montreal Expos | WAS | -1.47 | 199005280_WAS_ATL |
Based on accumulated WAA for this season up to 1990-05-29.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +017+ | 2.25 | Juan Agosto | 32.3 | HOU |
| +018+ | 2.24 | Gregg Olson | 27.3 | BAL |
| +019+ | 2.24 | Mark Eichhorn | 37 | ANA |
| +022+ | 2.2 | Tim Leary | 67.7 | NYA |
| +025+ | 2.13 | Jeff Brantley | 35.3 | SFN |
| +029+ | 1.95 | Doug Jones | 25.7 | CLE |
| +036+ | 1.75 | Danny Darwin | 26.7 | HOU |
| +038+ | 1.64 | Paul Assenmacher | 37 | CHN |
| +043+ | 1.58 | Bill Landrum | 24.3 | PIT |
| +045+ | 1.55 | Mark Williamson | 29 | BAL |
| +048+ | 1.53 | Jim Acker | 33.3 | TOR |
| +051+ | 1.5 | Jeff Montgomery | 35.3 | KCA |
| +050+ | 1.5 | Dennis Eckersley | 19.3 | OAK |
| +052+ | 1.49 | Greg Harris | 32.3 | SDN |
| +055+ | 1.45 | Rob Dibble | 26 | CIN |
| +058+ | 1.42 | Larry Andersen | 27.7 | HOU |
| +063+ | 1.35 | Bill Sampen | 22 | WAS |
| +064+ | 1.34 | Lee Smith | 31 | TOT |
| +068+ | 1.33 | Mike Schooler | 24 | SEA |
| +071+ | 1.3 | Terry Leach | 30.3 | MIN |
| +075+ | 1.25 | Barry Jones | 23.3 | CHA |
| XXXXX | 1.22 | Wayne Edwards | 23 | CHA |
| XXXXX | 1.21 | Craig Lefferts | 22.3 | SDN |
| XXXXX | 1.21 | Rick Honeycutt | 18.3 | OAK |
| XXXXX | 1.17 | Paul Gibson | 33.7 | DET |
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