Career
Hegen began playing for his hometown ESV Kaufbeuren in 1979. Hegen was drafted 46th overall by the Montreal Canadiens in the 1981 National Hockey League Entry Draft but never signed a contract and remained with Kaufbeuren until 1985 when he joined Kölner European Commission, winning the Bundesliga championship in 1987 and 1988. The team also changed its name to Mad Dogs München for the inaugural DEL season which turned out to be their only season as they would fold on December 18, 1994, just 27 games into the 44 game season.
In 1998, he moved to Star Bulls Rosenheim.
In 2000, Rosenheim left the DEL and Hegen decided to drop two division to the Oberliga and re-join ESV Kaufbeuren. He remained with the team until his retirement in 2002.
His appearance at the 1998 Olympics made him, along with Raimo Helminen (Finland) the third and fourth hockey players to ever compete at five Winter Olympics, after Udo Kießling (Germany) and Petter Thoresen (Norway).