Former Cleveland Cavaliers player and now NBA gambling suspect Damon Jones would strut around Vegas boasting about his friendship with LeBron James to try to land favors, a witness said Friday. Michael Osborne, a professional gambler and sports bettor, told The Post he would often see the Cuban cigar-chomping Jones, 49, hanging around the ARIA Resort & Casino in Las Vegas to the point where he thought Jones lived there. “He was a bad, degenerate gambler,” Osborne claimed of the ex-player — who