| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.8 | 199007150_MIL_OAK |
| Cincinnati Reds | CIN | 2.19 | 199007130_NYN_CIN |
| Baltimore Orioles | BAL | 1.42 | 199007150_MIN_BAL |
| New York Mets | NYN | 1.4 | 199007150_NYN_CIN |
| Detroit Tigers | DET | 1.14 | 199007150_TEX_DET |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -4.09 | 199007150_WAS_ATL |
| Chicago Cubs | CHN | -3.43 | 199007150_LAN_CHN |
| St. Louis Cardinals | SLN | -1.49 | 199007140_SFN_SLN |
| California Angels | ANA | -0.69 | 199007150_TOR_ANA |
| New York Yankees | NYA | -0.65 | 199007130_CHA_NYA |
Based on accumulated WAA for this season up to 1990-07-15.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +013+ | 3.97 | Jeff Brantley | 69.3 | SFN |
| +016+ | 3.87 | Mark Williamson | 61 | BAL |
| +027+ | 3.11 | Dennis Eckersley | 38.7 | OAK |
| +028+ | 2.95 | Gregg Olson | 46.3 | BAL |
| +033+ | 2.87 | Doug Jones | 47 | CLE |
| +036+ | 2.84 | Bill Swift | 63 | SEA |
| +034+ | 2.84 | Edwin Nunez | 56 | DET |
| +040+ | 2.67 | Bill Landrum | 45.3 | PIT |
| +048+ | 2.37 | Bobby Thigpen | 49.7 | CHA |
| +049+ | 2.36 | Gene Nelson | 39.7 | OAK |
| +051+ | 2.33 | Tom Henke | 44 | TOR |
| +055+ | 2.22 | Mark Eichhorn | 59.3 | ANA |
| +056+ | 2.21 | Steve Farr | 60.3 | KCA |
| +057+ | 2.17 | Lee Smith | 53.3 | TOT |
| +060+ | 2.12 | Randy Myers | 49 | CIN |
| +064+ | 2.02 | Jeff Montgomery | 56 | KCA |
| +067+ | 1.96 | Bill Sampen | 51.3 | WAS |
| +071+ | 1.91 | Rob Dibble | 51.3 | CIN |
| +074+ | 1.82 | Mike Henneman | 54 | DET |
| +079+ | 1.76 | Terry Leach | 53.3 | MIN |
| +081+ | 1.73 | Greg Harris | 66 | SDN |
| +082+ | 1.72 | Darrel Akerfelds | 50.7 | PHI |
| +086+ | 1.63 | Mike Schooler | 40.7 | SEA |
| +088+ | 1.61 | Bob Patterson | 59 | PIT |
| +091+ | 1.58 | Keith Comstock | 31 | SEA |
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