Mark Andreas Cornelis Versfeld (born June 13, 1976) is a Canadian former competitive swimmer and backstroke specialist.

[2] Two years after his birth, his family moved to Fort McMurray where he started swimming in a club at age 8.

[4] After the departure of his Calgary coach Deryk Snelling, Versfeld moved to Vancouver, where he trained under Tom Johnson with the University of British Columbia.

He was part of the winning team in the Rottnest 21-kilometre open-water relay swim in 2006, along with Australian Olympians Bill Kirby, Todd Pearson and Duncan Armstrong.

[6] His father Kees (Cornelis) won a Silver Medal in the 320+ age group relay at the FINA World Masters Swim Championships held in Montreal in 2014.