Okay, Marci, thank you. New dynasty in professional sports, the warriors sweeping the Cleveland cavaliers. But it was Lebron James wearing a cast on his hand in the postgame press conference that has everybody talking about his secret injury and whether the king of the NBA may have played his last game as a Cavs. Here's ABC's T.J. Holmes. There's a new dynasty in the NBA. Reporter: Golden state warriors, champions again. Total domination here in game four. Reporter: Sweeping the Cleveland cavaliers, crushing the king on his own court. We got the job done with a 4-0 sweep. Reporter: Lebron James did put up a fight. But revealed after the game he's been dealing with an injury since that critical game one error by J.R. Smith, who mistakenly ran out the clock. Lebron says he lost his temper and punched a whiteboard. Pretty much played the last three games with a broken hand. Reporter: Tonight, fans in Cleveland are on edge. Fearing it may have been Lebron's last game as a cav. He'll be a free agent with several cities openly vying for the game's best player. When I decide my future, my family and the folks who have been with me the last 20 years will have a say-so. And ultimately will come down to me. Reporter: The warriors meanwhile are heading home with their third title in four years. One place there won't be a celebration is at the white house, the president announced that in fact neither team, whoever won, would be invited to the white house to celebrate their NBA champion. NBA commissioner Adam silver has called that situation sad.