| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 2.37 | 199006300_OAK_TOR |
| Houston Astros | HOU | 2.37 | 199006290_HOU_PHI |
| Kansas City Royals | KCA | 2.1 | 199006280_KCA_SEA |
| Cincinnati Reds | CIN | 2.09 | 199006300_CIN_NYN |
| Chicago White Sox | CHA | 1.9 | 199006290_NYA_CHA |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Chicago Cubs | CHN | -4.73 | 199006280_WAS_CHN |
| Atlanta Braves | ATL | -4.18 | 199006300_ATL_WAS |
| Milwaukee Brewers | MIL | -1.14 | 199006300_MIL_SEA |
| St. Louis Cardinals | SLN | -1.09 | 199006300_SLN_LAN |
| Philadelphia Phillies | PHI | -0.81 | 199006300_HOU_PHI |
Based on accumulated WAA for this season up to 1990-06-30.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +018+ | 3.32 | Jeff Brantley | 60 | SFN |
| +019+ | 3.1 | Mark Eichhorn | 55 | ANA |
| +024+ | 2.86 | Mark Williamson | 50 | BAL |
| +027+ | 2.7 | Edwin Nunez | 52 | DET |
| +033+ | 2.59 | Gregg Olson | 40 | BAL |
| +031+ | 2.59 | Dennis Eckersley | 33.3 | OAK |
| +036+ | 2.45 | Larry Andersen | 43 | HOU |
| +037+ | 2.41 | Doug Jones | 42 | CLE |
| +040+ | 2.36 | Greg Harris | 56 | SDN |
| +042+ | 2.3 | Bill Swift | 48 | SEA |
| +043+ | 2.27 | Rob Dibble | 44 | CIN |
| +050+ | 2.16 | Barry Jones | 37.7 | CHA |
| +051+ | 2.15 | Juan Agosto | 49 | HOU |
| +055+ | 2.01 | Bill Sampen | 45 | WAS |
| +058+ | 1.99 | Lee Guetterman | 51.3 | NYA |
| +060+ | 1.96 | Bill Landrum | 37 | PIT |
| +061+ | 1.94 | Paul Gibson | 46 | DET |
| +063+ | 1.89 | Bobby Thigpen | 39.3 | CHA |
| +064+ | 1.88 | Tom Henke | 37 | TOR |
| +068+ | 1.86 | Jeff Montgomery | 47.7 | KCA |
| +067+ | 1.86 | Steve Farr | 47.7 | KCA |
| +075+ | 1.71 | Mike Schooler | 34.7 | SEA |
| +077+ | 1.69 | Gene Nelson | 32.7 | OAK |
| +078+ | 1.69 | Rick Aguilera | 34 | MIN |
| +081+ | 1.63 | Craig Lefferts | 45.7 | SDN |
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