The Cleveland Cavaliers are an absolute mess this season, and owner Dan Gilbert has finally had enough. After watching his team suffer a humiliating defeat at home against a depleted Los Angeles Lakers team on Wednesday, Gilbert made the decision to fire general manager Chris Grant, the architect of this currently-disastrous team. Adrian Wojnarowski of Yahoo Sports first reported the news: Gilbert informed Grant of his dismissal late Thursday morning, sources said. Assistant general manager David Griffin will take over as the interim GM,