"All signs indicate that it's Fox who will not be in uniform next season, whether he retires or takes a buyout. But that may be good news for the Celtics, who would gain another roster spot and who have plans to sign a free agent big man. According to Rivers, the team would not have made the trade if it couldn't sign another big man. Former Piston Zeljko Rebraca, whom Ainge watched work out a couple of weeks ago, and Tom Gugliotta are candidates."