Ozzie Guillen has fired back at his former pitching coach with the White Sox, calling Don Cooper a great coach but saying he stabbed his fellow coaches in the back when he negotiated a recent contract extension. Guillen, hired last month to manage the Marlins after eight years in Chicago, denied what Cooper had asserted on a radio station two weeks ago -- that Guillen had told White Sox general manager Kenny Williams to "let them sweat," in reference to re-signing the coaching staff. "Cooper needs to look in the mirror," Guillen said. "He didn't backstab me. I know who he is. He backstabbed his fellow coaches, the guys he worked with for years. You got family? That's fine. Everyone does. We all knew Coop was Kenny's b----. "Look, Coop is not a good coach; he's a great coach. But Coop is Coop. He doesn't worry about anyone; he worries about himself. I stuck up for my coaches like a m-----------."