Johannes Petrus "Jannie" Claassens (born 30 June 1969) is a South African former rugby union player.
[1][2] As a schoolboy Claassens represented Stellaland at the 1988 Craven Week tournament.
He made his provincial debut for Northern Transvaal in 1990 and played 102 matches for the union.
[3] In 1994 he toured with the Springboks to New Zealand and to Britain and Ireland.
[4] Claassens was voted as one of the five South Africa Young Players of the Year for 1990, along with Andrew Aitken, Bernard Fourie, Ian MacDonald and Theo Jansen van Rensburg.