[6] Jan Wilkens toured New Japan Pro-Wrestling in 1973 with fellow Bronco Universal Promotions regular Manie van Zyl as part of the NJPW Big Fight Series.
[7] Jan Wilkens debuted in 1964 at the age of 21, immediately making an impact on the pro wrestling scene because of his size and ring fervour.
On 2 August 1973, Jan Wilkens lost to Otto Wanz in a match to determine the first Catch Wrestling Association CWA World Heavyweight Champion.
[11] In May, 1980, he defeated Angelo Mosca in Cape Town at the Good Hope Centre to retain the South African Heavyweight Title.
[11] On 3 October 1981, Blackjack Mulligan defeated Jan Wilkens to win the EWU World Super Heavyweight Championship.
[1][3][12] On 6 October 1984, Hercules Ayala defeated Jan Wilkens to win the EWU World Super Heavyweight Championship.
[11] On 5 March 1986, Wilkens defended the EWU World Super Heavyweight Championship against Dirty Jack Burch at the Good Hope Centre in Cape Town, winning via disqualification.