Richard Sidney Mulhern (born March 1, 1955) is a Canadian retired ice hockey defenceman. Mulhern was born in Edmonton, Alberta and raised in Beaconsfield, Quebec. Before playing in the NHL, he played for the Sherbrooke Castors. Also, around the end of his career he played with the Tulsa Oilers and Dallas Black Hawks, of the Central Hockey League. Mulhern started his National Hockey League career with the Atlanta Flames in 1975, after being picked eighth overall in the 1975 Amateur Draft and being first sent to Tulsa where he played 56 games during the 1975-76 season.