[1] Clarke played for the New Zealand Schoolboys' side in 1956.
[2] He was first selected for the New Zealand national rugby league team in 1966.
[citation needed] Clarke went on to play three test matches for the Kiwis, including at the 1968 World Cup.
[2] Clarke was Papanui's player-coach when they won the 1971 and 1972 Canterbury championships.
He assisted Woolston in 1973 and later was the head coach of Sydenham in 1977 and 1978.