Career
He competed at the 1994, 1998 and 2002 Winter Olympics, winning a silver medal in the Super-G at the 1998 Nagano Olympics. Knauß tested positive for the anabolic steroid Nandrolone at a World Cup downhill in Lake Louise in Canada on 27 November 2004 and was subsequently given an 18-month ban from sport. Knauß retired from the sport after the doping sanction.