Duane Charles "Bill" Parcells (born August 22, 1941) is an American former football coach who served as a head coach in the National Football League (NFL) for 19 seasons. He came to prominence as the head coach of the New York Giants from 1983 to 1990, where he won two Super Bowl titles. Parcells was later the head coach of the New England Patriots from 1993 to 1996, the New York Jets from 1997 to 2000, and the Dallas Cowboys from 2003 to 2006. Nicknamed "the Big Tuna", he is the only NFL coach to lead four different franchises to the playoffs and three to a conference championship game.

Description above from the Wikipedia article Bill Parcells, licensed under CC-BY-SA, full list of contributors on Wikipedia.