Keith Raymond Christiansen (July 14, 1944 – November 5, 2018) was a professional ice hockey player who appeared in 138 World Hockey Association (WHA) regular season games with the Minnesota Fighting Saints between 1972 and 1974. Before turning professional, he was a member of the United States' 1972 Winter Olympics team that won the silver medal and also represented the United States at the 1969, 1970 and 1971 Ice Hockey World Championships. Christiansen was born in Fort Frances, Ontario, Canada. He played hockey in high school for International Falls, Minnesota then went to University of Minnesota Duluth where he was captain of the hockey team. He is one of the more famed UMD Bulldogs; Christensen is in the UMD Hall of Fame and has his number 9, hung in Amsoil Arena where the Bulldogs currently play. He also played with the Waterloo Black Hawks and Grand Rapids Bruins of the United States Hockey League as an amateur. He was inducted into the United States Hockey Hall of Fame in 2005. Christiansen died in 2018 at the age of 74 from lung cancer.