Rich Moran, the agent for the Eagles' two-time Pro Bowl guard Shawn Andrews, said Wednesday that Robert Watkins will perform a more extensive surgery than the previous one next week out in Southern California. "He had a discogram last week that verified it," Moran said. A discogram is a procedure in which a needle is placed in the disc in the back. Dye is injected so it can be examined under an X-ray.