Piston van Wyk

 Jacobus Frederick Beatrix 'Piston' van Wyk  (born 21 December 1943) is a former South African rugby union player.

Playing career
Van Wyk played most of his provincial rugby in South Africa with and also played one season with. He made his test debut for the Springboks in 1970 against New Zealand at Loftus Versfeld in Pretoria and played in all four tests during the series against the touring All Blacks. In 1971 he played in the test series against France and Australia and in 1972, he was the hooker in the losing test against at Ellis Park. He then played three tests against the 1974 British Lions and two tests against the 1976 All Blacks. He also played four tour matches for the Springboks.