| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 5.88 | 199007061_OAK_CLE |
| Cincinnati Reds | CIN | 2.48 | 199007050_CIN_PHI |
| Detroit Tigers | DET | 1.96 | 199007050_KCA_DET |
| Chicago White Sox | CHA | 1.53 | 199007040_DET_CHA |
| Kansas City Royals | KCA | 1.42 | 199007040_NYA_KCA |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -3.82 | 199007060_NYN_ATL |
| Chicago Cubs | CHN | -2.61 | 199007040_CHN_LAN |
| Milwaukee Brewers | MIL | -2.51 | 199007060_ANA_MIL |
| St. Louis Cardinals | SLN | -1.62 | 199007050_SLN_SDN |
| Philadelphia Phillies | PHI | -1.47 | 199007040_ATL_PHI |
Based on accumulated WAA for this season up to 1990-07-06.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +013+ | 3.53 | Jeff Brantley | 62.3 | SFN |
| +019+ | 3.14 | Mark Eichhorn | 58 | ANA |
| +025+ | 3.01 | Mark Williamson | 51.3 | BAL |
| +031+ | 2.79 | Dennis Eckersley | 35.3 | OAK |
| +033+ | 2.72 | Edwin Nunez | 54.7 | DET |
| +035+ | 2.61 | Gregg Olson | 42.3 | BAL |
| +037+ | 2.56 | Doug Jones | 43.7 | CLE |
| +038+ | 2.47 | Rob Dibble | 48.3 | CIN |
| +041+ | 2.42 | Bill Landrum | 42.3 | PIT |
| +046+ | 2.31 | Bill Sampen | 48.3 | WAS |
| +047+ | 2.29 | Greg Harris | 62.7 | SDN |
| +048+ | 2.27 | Steve Farr | 54.3 | KCA |
| +049+ | 2.26 | Bobby Thigpen | 43.7 | CHA |
| +050+ | 2.25 | Tom Henke | 41 | TOR |
| +061+ | 1.94 | Bill Swift | 51 | SEA |
| +063+ | 1.92 | Lee Smith | 50.7 | TOT |
| +064+ | 1.89 | Gene Nelson | 34.7 | OAK |
| +065+ | 1.85 | Dennis Lamp | 56.7 | BOS |
| +066+ | 1.84 | Barry Jones | 41.3 | CHA |
| +067+ | 1.83 | Mike Schooler | 38.3 | SEA |
| +070+ | 1.78 | Scott Radinsky | 33.7 | CHA |
| +069+ | 1.78 | Jeff Montgomery | 51.3 | KCA |
| +071+ | 1.75 | Paul Gibson | 51 | DET |
| +074+ | 1.74 | Rick Honeycutt | 35.3 | OAK |
| +077+ | 1.72 | Randy Myers | 44.7 | CIN |
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