 John Cena, the wrestler-turned-actor, announcing that he will retire from pro wrestling next year after two decades in the ring, 16-time WWE champ. Cena starred in the movies Blockers and Suicide Squad. Among the U.S. Olympic basketball team members holding the squad's first practice this weekend, ahead of the Paris Summer Games, one star taking his first steps toward becoming the first U.S. men's basketball player to compete at the Olympics in three different decades, LeBron James. Chuck Sievertson, ABC News.