NBA superstar LeBron James has probably played his final game for the United States national team, according to USA Basketball managing director Jerry Colangelo.

James, a 36-year-old playmaker for the Los Angeles Lakers, is a two-time Olympic gold medal winner and four-time NBA champion, but he has opted out of the past two Olympic cycles.

"Father Time takes its toll," Colangelo said of James on ESPN on Wednesday. "If you're a human being, your body is built to go so long depending on what your sport is, and then it's a downhill situation.

"LeBron made choices these last couple of Olympics not to participate because he's got a lot of things going on in his life.

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"So he put in his time, he made a contribution that is appreciated, but I think his time is over."

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James will star in the movie "Space Jam: A New Legacy" that is due to be released July 16.

James played for the 2008 and 2012 US Olympic championship teams. He was also a member of the 2004 American squad that settled for bronze in Athens, playing mainly a reserve role.

The 12-man US roster for the Tokyo Olympics includes two players from the 2016 roster, Kevin Durant and Draymond Green, and a new generation of NBA talent.

The lineup includes Kevin Love, a former James teammate with Cleveland who played on the 2012 Olympic squad. Colangelo described his role as an extra big man as "insurance" with limited options for US big men.

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"Most of the bigs in the NBA are international players. They are not American players," Colangelo said. "We haven't developed bigs the way they have in other countries."

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