Michael Josias du Plessis (born 4 November 1958) is a former South African rugby union player.
[1] Du Plessis played for Western Province, Northern Transvaal, Transvaal, Eastern Province and the Springboks.
He made his test debut against the visiting South American Jaguars team on 20 October 1984.
[2] Capped 8 times, he scored 1 try for the Springboks.
Du Plessis is the brother of Willie du Plessis and Carel du Plessis, both former Springboks, and the father of Daniël du Plessis.