Career
Mazur started his National Hockey League career with the Montreal Canadiens in 1951. He played in the 1951, 1952 and 1953 playoffs for the Canadiens prior to ever playing a regular season game in the National Hockey League. He became the first player in National Hockey League history to score four playoff goals prior to playing a regular season game. Chris Kreider of the New York Rangers exceeded that mark with five goals in the 2012 postseason.
He would also play with the Chicago Black Hawks.
He would leave the National Hockey League after the 1957 season. He retired from hockey in 1965.