The Swiss player has played over 800 NHL matches for the Montréal Canadiens, the New York Islanders, the Philadelphia Flyers and the Pittsburgh Penguins. At the end of his career, Mark was a record NHL player in several categories. He was also on the ice for the Swiss National A League for almost 500 games. With the ZSC Lions he won the Swiss Championship in 2001. He was captain of the Swiss national team playing at an international level at numerous world championships.