| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.32 | 199005230_MIL_OAK |
| New York Mets | NYN | 4.22 | 199005210_NYN_LAN |
| Cincinnati Reds | CIN | 2.13 | 199005210_CIN_CHN |
| Kansas City Royals | KCA | 1.7 | 199005210_KCA_DET |
| New York Yankees | NYA | 1.28 | 199005230_NYA_MIN |
| Team | Tm | Tier | Game |
|---|---|---|---|
| California Angels | ANA | -2.91 | 199005210_ANA_CLE |
| Atlanta Braves | ATL | -2.81 | 199005210_SLN_ATL |
| Chicago Cubs | CHN | -2.18 | 199005220_CIN_CHN |
| Philadelphia Phillies | PHI | -1.14 | 199005210_PHI_SFN |
| Montreal Expos | WAS | -0.9 | 199005220_SDN_WAS |
Based on accumulated WAA for this season up to 1990-05-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +011+ | 2.3 | Juan Agosto | 28.3 | HOU |
| +022+ | 1.82 | Tim Leary | 59.7 | NYA |
| +023+ | 1.79 | Gregg Olson | 22.3 | BAL |
| +027+ | 1.69 | Doug Jones | 23 | CLE |
| +031+ | 1.63 | Greg Harris | 29.3 | SDN |
| +030+ | 1.63 | Paul Assenmacher | 34.7 | CHN |
| +034+ | 1.62 | Mark Eichhorn | 29.7 | ANA |
| +035+ | 1.58 | Jeff Brantley | 29.3 | SFN |
| +040+ | 1.5 | Dennis Eckersley | 17 | OAK |
| +043+ | 1.49 | Bill Landrum | 23.3 | PIT |
| +046+ | 1.43 | Larry Andersen | 23.3 | HOU |
| +047+ | 1.43 | Jim Acker | 32 | TOR |
| +049+ | 1.41 | Rob Dibble | 23.3 | CIN |
| +051+ | 1.35 | Danny Darwin | 22.3 | HOU |
| +058+ | 1.26 | Bill Sampen | 18.7 | WAS |
| XXXXX | 1.18 | Jeff Montgomery | 32 | KCA |
| XXXXX | 1.14 | Rick Honeycutt | 17.7 | OAK |
| XXXXX | 1.11 | Terry Leach | 26 | MIN |
| XXXXX | 1.1 | Mike Schooler | 21.3 | SEA |
| XXXXX | 1.09 | Barry Jones | 19.3 | CHA |
| XXXXX | 1.06 | Dennis Lamp | 30.3 | BOS |
| XXXXX | 1.06 | Wayne Edwards | 21.3 | CHA |
| XXXXX | 1.06 | Darrel Akerfelds | 14 | PHI |
| XXXXX | 1.06 | Willie Blair | 18.7 | TOR |
| XXXXX | 1.01 | Mark Williamson | 23 | BAL |
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