Boston Celtics forward Rasheed Wallace, second from right, who was signed as a free agent, jokes with his teammates during a news conference at the team's training facility in Waltham, Mass., Thursday July 9, 2009. Wallace, a 14-year NBA veteran, averaged 12.0 points and 7.4 rebounds with the Detroit Pistons last season. From left are Celtics' Kevin Garnett, Paul Pierce, Ray Allen, Wallace and general manager Danny Ainge. (AP Photo/Charles Krupa)