I would be more than upset if I lost my star player to another team, but Cleveland Cavs owner, Dan Gilbert, was more than upset he had the gas face about it. What team owner-slash-millionaire writes an open letter to their former player? He took it as a break up of sorts. He called LeBron a quitter, and said the Cavs would win a championship before the Heat. I guess that panned out wrong. Lebron-1. Dan Gilbert-0.