Flyers defenseman Derian Hatcher underwent full right-knee replacement surgery June 1, the Flyers announced Friday. The procedure likely signals the end of his career. "It is a full knee replacement," Hatcher said. "I think they just go in there and saw some of the bone away and put the new knee in. I kind of know the process, but it is hard to explain. "Rehab is not too bad. I am going about five times a week. For being 10 days out, I have made a ton of progress." No NHL player has ever made a comeback to the ice with a brand new knee. "I seriously doubt it," Hatcher said. "The doctor said no. So there you go."