Claim: Bismarck du Plessis, who plays for Montpellier in the French Top 14, made his debut for South Africa as a substitute in the same game against Australia and he and his brother became the 23rd set of brothers to earn caps for South Africa at rugby union.
Evidence: Bismarck Wilhelm du Plessis (born 22 May 1984) is a South African professional rugby union player, who plays for Montpellier in the French Top 14. He made his debut for South Africa as a substitute in the same game against Australia in Sydney in which his older brother, Jannie, who was in the starting XV, also made his Springboks debut. The Du Plessis brothers became the 23rd set of brothers to earn caps for South Africa at rugby union.