John Muckler (born April 13, 1934) is a professional hockey coach and executive, most recently serving as the general manager of the Ottawa Senators of the National Hockey League (NHL).
Muckler has over 50 years of professional hockey experience as a part owner, general manager, director of player personnel, director of hockey operations, head coach, assistant coach and player.
He has been a part of five Stanley Cup championships in various roles.