Duane Charles "Bill" Parcells (born August 22, 1941) is currently a team consultant for the Miami Dolphins of the National Football League. He is also a former American football head coach, most recently with the Dallas Cowboys from 2003 to 2006. He is known as "The Big Tuna", a nickname about the shape of his physique derived from a team joke during his tenure as linebackers coach of the New England Patriots.
Parcells won two Super Bowl rings with the Giants, defeating the Denver Broncos in Super Bowl XXI and the Buffalo Bills in Super Bowl XXV. He also led the New England Patriots to Super Bowl XXXI and the New York Jets to the 1998 AFC Championship Game. He announced his third retirement from football on January 22, 2007 before returning to the sport later that year in a management position with the Dolphins.
Parcells was born in Englewood, New Jersey, on August 22, 1941. He grew up in the nearby town of Hasbrouck Heights, His mother, Ida Parcells (née Naclerio), was a housewife while his father, Charles Parcells, was a graduate of Georgetown Law School who had worked for the FBI before becoming a lawyer for Uniroyal Tires. Bill Parcells is of Irish and Italian descent.