After high school he swam and played water polo for
Fullerton Junior College, also coached by Smith, which won the Southern California Jr. College Championship in 1936 during Christensen's tenure with the team. While at UCLA, the team won the Pacific Coast Conference titles in both 1937 and 1939. Christensen was a swimming champion in the 220 yard event. While in a UCLA meet against rival University of California, Christensen set a record time of 54.8 in the 100-yard freestyle in early April, 1940. Christensen's coach Smith was adept at utilizing his water polo players speed as an advantage. Christensen was also a member of the LAAC squad that won an AAU Outdoor National title in 1941 and the 1947 National Amateur Athletic Union Water Polo Championship. Competing out of the
Los Angeles Athletic Club, Christensen was a member of the United States national team that was eliminated in the second round of
the 1948 Summer Olympic water polo tournament. Christensen earned All Southern California High School honors in 1935, and All Southern California Jr. College honors in 1936. He was a PAC Conference selection for the years 1937, 1939, and 1940. In 1983, he was inducted into the
USA Water Polo Hall of Fame. ==Personal life==