Free-agent forward Derrick Williams has agreed to a one-year, $5 million deal with the Miami Heat, league sources told The Vertical. After a productive season with the New York Knicks, Williams, 25, identified the opportunity that comes with a Miami organization that’s facing significant free-agent losses as a chance to further showcase his talent for a return to the free-agent market in 2017. Williams has been impressed with how coach Erik Spoelstra’s system has strengthened the value of players such as center Hassan Whiteside and guard Tyler Johnson. - See more at: http://sports.yahoo.com/news/sources--derrick-williams-reaches-deal-with-heat-211552842.html