AUBURN HILLS, Mich. -- The Detroit Pistons traded forward Ronald Dupree to the Minnesota Timberwolves on Monday for a future second-round pick, clearing a roster spot for rookie guard Alex Acker. Dupree averaged 3.2 points in 47 games last season after signing a two-year contract with the Pistons. The 6-foot-7 forward averaged 6.2 points as a rookie with Chicago in 2003-04 season after almost making Detroit's team as an undrafted free agent. The Pistons made the move to clear a spot on the roster for Acker, the 60th and final pick overall. The 6-foot-5 guard entered the draft after his junior season at Pepperdine.