Desc: Greatest of all Time: Directed by Antonio Paris. In 1955, Overbook High School became the first to win back to back Championships in the City of Philadelphia. During this time Wilt Chamberlain was becoming the Greatest player of all Times, when he set multiple records that have never been broken. He fought racial barriers while attending Kansas University and became the first player to average 50 points and 25 rebounds per game in the NBA.