Richard Basil Prentis (born 27 February 1947) is a former South African rugby union player.
Prentis played for Transvaal during his provincial career, which began in 1974. He made his international debut for the Springboks against the visiting South American Jaguars team on 26 April 1980. In 1980, he played in all four tests against the Lions and followed it with tests against the South American Jaguars, France and in 1981, Ireland.
During the 1980 Springbok tour to South America, Prentis played in four tour matched and also captained the side against a Paraguay Invitation XV in Asunción. He played in 11 test matches for the Springboks.