| Team | Tm | Tier | Game |
|---|---|---|---|
| New York Mets | NYN | 4.27 | 199005180_NYN_SDN |
| Oakland Athletics | OAK | 3.71 | 199005180_OAK_MIL |
| Cincinnati Reds | CIN | 1.57 | 199005180_SLN_CIN |
| Cleveland Indians | CLE | 0.8 | 199005160_OAK_CLE |
| Toronto Blue Jays | TOR | 0.77 | 199005170_SEA_TOR |
| Team | Tm | Tier | Game |
|---|---|---|---|
| California Angels | ANA | -3.03 | 199005180_ANA_TOR |
| Chicago Cubs | CHN | -2.35 | 199005160_CHN_ATL |
| Atlanta Braves | ATL | -2.03 | 199005180_PIT_ATL |
| San Francisco Giants | SFN | -0.87 | 199005160_NYN_SFN |
| Seattle Mariners | SEA | -0.78 | 199005180_SEA_CLE |
Based on accumulated WAA for this season up to 1990-05-18.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +014+ | 1.84 | Juan Agosto | 23.3 | HOU |
| +017+ | 1.76 | Rob Dibble | 20 | CIN |
| +026+ | 1.59 | Mark Eichhorn | 27.3 | ANA |
| +027+ | 1.58 | Paul Assenmacher | 31.3 | CHN |
| +031+ | 1.53 | Greg Harris | 26.3 | SDN |
| +032+ | 1.51 | Gregg Olson | 19.3 | BAL |
| +033+ | 1.5 | Doug Jones | 21 | CLE |
| +036+ | 1.47 | Duane Ward | 28 | TOR |
| +043+ | 1.3 | Dennis Eckersley | 15 | OAK |
| +048+ | 1.26 | Scott Radinsky | 14.3 | CHA |
| +050+ | 1.25 | Danny Darwin | 19 | HOU |
| +052+ | 1.25 | Bill Landrum | 18.7 | PIT |
| XXXXX | 1.19 | Jeff Brantley | 25 | SFN |
| XXXXX | 1.16 | Larry Andersen | 20.3 | HOU |
| XXXXX | 1.15 | Darrel Akerfelds | 12.7 | PHI |
| XXXXX | 1.14 | Jim Acker | 29 | TOR |
| XXXXX | 1.13 | Bill Sampen | 17.3 | WAS |
| XXXXX | 1.06 | Kevin Appier | 16.7 | KCA |
| XXXXX | 1.06 | Dan Schatzeder | 24 | HOU |
| XXXXX | 1.05 | Jeff Montgomery | 28.3 | KCA |
| XXXXX | 1.02 | Wayne Edwards | 18.7 | CHA |
| XXXXX | 1.02 | Barry Jones | 16.3 | CHA |
| XXXXX | 0.94 | Atlee Hammaker | 38.7 | SFN |
| XXXXX | 0.93 | Mike Jeffcoat | 24.3 | TEX |
| XXXXX | 0.93 | Mike Schooler | 17.3 | SEA |
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