Kansas City Royals -- Announced Mickey Cobb has resigned as trainer.
Dallas Mavericks -- Released C Jesse Spinner, C Jim Grandholm, Joel DeBortoli and F Richard Hollis.
Houston Rockets -- Waived G Willie Bland.
Golden State Warriors -- Released C Chuck Nevitt, F Kenny Green, G Mitchell Henry and G Stan Kimbrough.
Portland Trail Blazers -- Agreed to extend contract of F Buck Williams (Maryland) through 1993-94.
San Antonio Spurs -- Waived G David Rivers.
Washington Bullets -- Released C Michel Bonebo.
Arkansas -- Signed basketball coach Nolan Richardson to seven-year contract.
Nebraska-Omaha -- Announced LB Larry Sibley no longer will play football due to neck injury.
Atlanta Falcons -- Signed LB Robert Lyles on waivers from Oilers. Placed OG John Scully on injured reserve.
Dallas Cowboys -- Agreed to terms with LB Jesse Solomon.
Detroit Red Wings -- Signed D Bobby Dollas. Assigned F Dennis Holland to IHL San Diego.
New York Islanders -- Assigned F Mick Vukota to AHL Capital District.
New York Rangers -- Signed RW Brian Mullen and C Kelly Kisio to multiyear contracts.
Washington Capitals -- Returned LW Steve Maltais to AHL Baltimore.
Baltimore Blast -- Announced MF Tim Wittman signed amendment to contract and will be placed on roster if MSL Players Association approves move.