According to Business Insider, LeBron James will miss at least 13 games with his groin injury, which makes this the worst setback of his career. James will be re-evaluated on Wednesday, and it's possible that he could miss even more time, because it would be risky to rush him back into the game. Groin injuries are among the trickiest and most nagging in sports, and if James were to re-injure it, it would be worse than this initial injury.