| Team | Tm | Tier | Game |
|---|---|---|---|
| Oakland Athletics | OAK | 4.93 | 199005260_CLE_OAK |
| New York Mets | NYN | 2.01 | 199005260_SDN_NYN |
| New York Yankees | NYA | 1.77 | 199005240_NYA_MIN |
| Kansas City Royals | KCA | 1.61 | 199005260_NYA_KCA |
| Cincinnati Reds | CIN | 1.43 | 199005260_CIN_WAS |
| Team | Tm | Tier | Game |
|---|---|---|---|
| Atlanta Braves | ATL | -3.44 | 199005260_ATL_PHI |
| California Angels | ANA | -2.88 | 199005240_TOR_ANA |
| Chicago Cubs | CHN | -1.88 | 199005240_LAN_CHN |
| Texas Rangers | TEX | -1.27 | 199005260_BAL_TEX |
| Philadelphia Phillies | PHI | -0.88 | 199005240_ATL_PHI |
Based on accumulated WAA for this season up to 1990-05-26.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +013+ | 2.33 | Juan Agosto | 28.3 | HOU |
| +018+ | 2.16 | Gregg Olson | 26.3 | BAL |
| +022+ | 2 | Mark Eichhorn | 34 | ANA |
| +023+ | 1.93 | Jeff Brantley | 33 | SFN |
| +025+ | 1.9 | Tim Leary | 59.7 | NYA |
| +026+ | 1.88 | Greg Harris | 31.7 | SDN |
| +027+ | 1.88 | Doug Jones | 24.7 | CLE |
| +036+ | 1.69 | Paul Assenmacher | 35 | CHN |
| +042+ | 1.56 | Jim Acker | 33.3 | TOR |
| +044+ | 1.52 | Dennis Eckersley | 19.3 | OAK |
| +045+ | 1.51 | Bill Landrum | 23.3 | PIT |
| +053+ | 1.38 | Mark Williamson | 27 | BAL |
| +056+ | 1.37 | Danny Darwin | 22.3 | HOU |
| +060+ | 1.34 | Larry Andersen | 26.7 | HOU |
| +059+ | 1.34 | Rob Dibble | 24.7 | CIN |
| +065+ | 1.31 | Jeff Montgomery | 33 | KCA |
| +066+ | 1.31 | Bill Sampen | 21.3 | WAS |
| +068+ | 1.3 | Lee Smith | 28 | TOT |
| XXXXX | 1.24 | Wayne Edwards | 23 | CHA |
| XXXXX | 1.22 | Rick Honeycutt | 18.3 | OAK |
| XXXXX | 1.15 | Wally Whitehurst | 19.7 | NYN |
| XXXXX | 1.14 | Terry Leach | 26 | MIN |
| XXXXX | 1.11 | Mike Schooler | 21.3 | SEA |
| XXXXX | 1.06 | Barry Jones | 21 | CHA |
| XXXXX | 1.03 | Scott Radinsky | 18.3 | CHA |
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