William Robert Guerin (born November 9, 1970) is an American retired professional ice hockey right winger. He works as the assistant general manager of the Pittsburgh Penguins. Guerin played 18 seasons in the National Hockey League (NHL). He played with the New Jersey Devils, Edmonton Oilers, Boston Bruins, Dallas Stars, St. Louis Blues, San Jose Sharks, New York Islanders, and Pittsburgh Penguins.