Boston Celtics jersey history No. 55 - Eric Williams (1995-2003) During his time suiting up for the Celtics, Williams wore only jersey No. 55 and put up 9.2 points, 3.5 rebounds, and 1.5 assists per game. Content Original Link: https://sports.yahoo.com/articles/boston-celtics-jersey-history-no-130021151.html