Marthinus "Oupa" Versfeld was a South African international rugby union player. He was born and educated in Cape Town, where he attended SACS and played provincial rugby with Western Province. Versfeld made his only Test appearances for South Africa during Great Britain's 1891 tour. He played, as a forward, in all three Test matches of what was South Africa's first series as a Test nation. His brother, Hasie Versfeld, was also selected to play in the 3rd Test of the series, making the Versfelds the first brothers to represent South Africa. Versfeld died in 1931, in Cape Town, at the age of 71.