Former German bobsledder and one of the most successful bob pilots of all time.
He won 3 gold medals in the World Junior Championships of bobsledding in 1998 and 1999.
He won 4 gold medals and 1 silver medal in his Olympics career.
He married Caroline Lange and the couple have a daughter and son together.
His first Olympic competition was in 2002 when skater Sarah Hughes also took home a gold medal.