As a 6'3" forward, Mulzoff played basketball collegiately at St. John's University for three seasons when it was located in Brooklyn, New York.
[1] Along with Al McGuire, he was co-captain of the varsity team as a senior during the 1950-1951 season, and helped lead the team to a 26-5 record, a berth in the NCAA Division I men's basketball tournament, and third place in the National Invitational Tournament.
[4] After his college playing career ended, Mulzoff coached high school basketball teams for many years.
He became assistant basketball coach at St. John's, which by then had moved to Queens, New York, and was then elevated to head coach in 1970 when Lou Carnesecca left to coach the New York Nets,[5] leading the team to two appearances in the National Invitational Tournament and one NCAA tournament in his three seasons.
[7][8] Mulzoff then became head coach of the Cherry Hill Rookies of the Eastern Basketball Association[9] and afterward continued to coach at high school, college, and minor league professional levels.