Powell will join the Heat for Summer League, Ira Winderman of the South Florida Sun Sentinel reports.
Powell played collegiately at Auburn, Tennessee and Washington State but went undrafted Thursday. However, he's been invited to compete for a role with the Heat during Summer League. During his time at Washington State last year, he averaged 10.4 points, 3.9 rebounds and 2.8 assists in 33.8 minutes per game.