William Robert Guerin (born November 9, 1970) is an American former professional ice hockey player and current player development coach for the Pittsburgh Penguins. Guerin played eighteen seasons in the National Hockey League (NHL) winning two Stanley Cup championships with the New Jersey Devils and Pittsburgh Penguins teams. Internationally, Guerin represented the United States in the Olympics in 1998, 2002 and 2006, and participated in two Ice Hockey World Championships. Guerin was the first player of Hispanic descent to play in the National Hockey League.
While playing hockey, Guerin lived in Moorestown Township, New Jersey with his wife and children.
Guerin was drafted in the 1989 NHL Entry Draft fifth overall by the Devils.