SuperSport United shot-stopper Ronwen Williams and Cape Town City defender Abbubaker Mobara were named as the overaged players in the U-23 squad.
David Notoane's side are in Group A at the Olympics and will come up against Japan, France and Mexico.
The South Africans will be hoping to better their showing at the 2016 edition where they finished bottom of the group with two points from three matches.
The team went into camp on Monday, 28 June in Nelspruit as part of their final preparations.
Goalkeepers: Ronwen Williams, Mondli Mpoto, Sifiso Mlungwana
Defenders: Katlego Mohamme, Luke Fleurs, Sibusiso Mabiliso, Abbubaker Mobara, Thabiso Monyane, Tericous Malope
Midfielders: Teboho Mokoena, Thabo Cele, Nkosingiphile Ngcobo, Sipho Mbule Goodman Mosele, Kamohelo Mahlatsi
Strikers: Fagrie Lakay, Luther Singh, Evidence Makgopa, Lyle Foster, Kobamelo Kodisang