Jan Nathaniel du Plessis is a South African rugby union player, who plays as a prop for in the French Top 14 and the Lions in Super Rugby. He played for the in the Currie Cup and the in Super Rugby until 2007, when he joined Durban-based side the, where he played until 2015. He won 70 caps for South Africa between 2007 and 2015.
He eventually made the senior Free State Cheetahs side in 2003, and continued playing for the Cheetahs through the 2007 Currie Cup. Du Plessis was also named to a South African squad that faced a World XV at Ellis Park in 2006. Du Plessis made his Super 14 debut in 2006 for the Cheetahs. His 2007 Super 14 campaign was hampered by an ankle injury. After recovering, he was selected for the Springboks squad for the first time during the 2007 Tri Nations, making his debut in the starting XV on 7 July against Australia during the Boks' home leg. The match was significant for him in another way, as his younger brotherBismarck made his Boks debut as a substitute in the same match while he was still on the field. This made the Du Plessis brothers the 23rd set of brothers to earn Springboks caps. Neither Jannie nor Bismarck was named to the Springboks' original squad for the 2007 Rugby World Cup, but both eventually joined the squad. After Bismarck had already been called up to replace Pierre Spies, Jannie was called up to replace BJ Botha after Botha blew out a knee against the USA in the Boks' final pool match. He received the call notifying him of his selection from Springboks selection panel member Peter Jooste early in the morning of1 October, shortly after finishing an all-night shift at a Bloemfonteinhospital on the evening of 30 September, during which he performed a Caesarean section. When interviewed after his selection, he said that his first sleep since 29 September was "an hour or so on the plane from Bloemfontein to Cape Town", where he travelled to do his required paperwork before joining the Boks in France. On 7 October, he was starting for the Boks in their quarterfinal against Fiji, after CJ van der Linde was ruled out with a knee injury. A week after the Boks' victory over England in the Rugby World Cup final, Du Plessis was in the squad for another final — the 2007 Currie Cup final, in which the Cheetahs defeated the Golden Lions 20–18. Because of his late call-up to the World Cup squad, he was the only member of the World Cup winners to play in enough Currie Cup matches to qualify for the final. Du Plessis joined three members of the 1995 Rugby World Cup winners as the only players to earn World Cup and Currie Cup winners' medals in the same year. Du Plessis had to use his medical skills unexpectedly in 2009. In the early morning hours of 29 March, BrumbieslockShawn Mackay was hit by a car outside a Durban nightclub, suffering a paralysing injury. Du Plessis was at the scene because he was helping Brumbies players get back to their hotel after their match with the Sharks; he helped Mackay breathe and contacted emergency services, who stabilised him and rushed him to a hospital. However, Mackay died from complications of his injuries several days later.