The Diamondbacks on Thursday told left fielder Luis Gonzalez they will not bring him back next season. "Obviously, this is a very difficult day for the organization," general manager Josh Byrnes said at a Chase Field news conference. "Gonzo's done about everything you can in this market as a player and as a person. "Change isn't easy, but we feel very good about the cast that will continue to wear the uniform," Byrnes added. Byrnes, managing partner Jeff Moorad and assistant general manager Peter Woodfork informed Gonzalez and his representatives of the club's decision during a breakfast meeting. Moorad is Gonzalez's former agent and negotiated the player's present contract.