Darcy John Regier (born November 27, 1956) is a Canadian professional ice hockey executive and former player. Regier was general manager of the Buffalo Sabres in the National Hockey League from 1997 until 2013. He was the longest-serving and winningest GM in Sabres history. In 2014, he became a senior vice president and assistant general manager with the Arizona Coyotes, ending his tenure with Arizona in 2016. Regier played 26 games in the NHL for the Cleveland Barons and New York Islanders as a defenseman.