A ruck-rover, he spent four seasons at South Melbourne after sitting out of football in 1969 while he awaited a clearance. When Murphy made his debut in the opening round of the 1970 season against Melbourne at Lake Oval, he was one of a group of five making their first appearances, including Gary Brice and Ricky Quade. He finished with 58 games and returned to his original club, Sturt, in 1974.
He represented South Australia at the 1966 Hobart Carnival and played a total of five games for his state over the course of his career. At Sturt he was a member of five premiership teams, the three-peat of 1966 to 1968 as well as 1974 and 1976.
His father Jack was a Copeland Trophy winner at Collingwood.
Victoria (VFL) 16.23 (119) defeated South Australia 7.9 (51), at North Hobart Oval, 11 June 1966, crowd: 23,764 Western Australia 13.11 (89) defeated South Australia 10.14 (74), at North Hobart Oval, 13 June 1966, crowd: 13,969 South Australia 21.20 (146) defeated Victoria (VFA) 9.11 (65), at North Hobart Oval, 16 June 1966, crowd: 10,199 South Australia 14.7 (91) defeated Tasmania 9.13 (67), at North Hobart Oval, 18 June 1966, crowd: 23,368