San Diego Padres -- Extended the contract of manager Greg Riddoch through the 1992 season.
Dallas Mavericks -- Signed C Donald Hodge to a 1-year contract.
Miami Heat -- Signed G Steve Smith, their first-round draft choice (Michigan State).
Milwaukee Bucks -- Signed F Billy Thompson.
New Jersey Nets -- Signed C Dave Feitl.
New York Knicks -- Signed G Greg Anthony, their first-round draft choice (12th overall, from UNLV), to a multi-year contract.
Miami Dolphins -- Placed LB Bryan Cox on IR. Activated LB Louis Cooper from IR.
Pittsburgh Steelers -- Activated CB Delton Hall from IR. Placed CB Shawn Vincent on IR. Signed C Dean Caliguire and added him to their practice squad.