WASHINGTON, June 29 (Xinhua) -- Miami Heat center Chris Bosh Sunday decided to exercise an early termination clause in his contract to become a free agent.

The NBA All-Star center's move gives the Heat a 55 million U.S. dollars in salary cap space going into the free agent signing period that begins July 1.

Before Bosh, teammates LeBron James and Dwyane Wade already chose to become free agents.