Career
He was capped twice by the Springboks and played centre and wing for Free State. In 1981, Müller was chosen for the South African School Team. Müller appeared as a replacement for the Springboks against the New Zealand Cavaliers in 1986, and against the World Invitation Team in 1989.
He also played three tour matches, and therefore appeared five times in the green-and-gold.
When the Free State played in the 1997 Super 12, Müller was captain. Müller"s Springbok appearances were limited by the strong competition at centre at the time, including Danie Gerber, Michael du Plessis and Faffa Knoetze.
Outside of rugby, Müller also represented Free State in cricket. He played six matches, with a batting average of 8.83 and a bowling average of 55.66.