Mark is considered one of the greatest players in the history of the National Hockey League. In an NHL career that spanned a quarter of a century with the Edmonton Oilers, New York Rangers, and Vancouver Canucks, Mark achieved six Stanley Cup championships and scored the third highest points in NHL history. He is the only professional athlete ever to captain two different franchises – the Edmonton Oilers and the New York Rangers – to championships. Since retiring as a player in 2004, Mark has taken on numerous executive roles. He is currently the CEO of the Kingsbridge National Ice Center, a development project that plans to convert a former National Guard armory in the Bronx, NY into the world’s largest indoor ice facility. Mark has also served as an executive with the New York Rangers and Hockey Canada and was a founder of the Messier Project that developed the M-11 hockey helmet to maximize protection, particularly in regard to concussions.