sentences:  Bill Parcells ran the Fairbanks-Bullough 3–4 defensive system during his coaching years.He served as an NFL head coach for 19 seasons, coaching the New York Giants (1983–1990), New England Patriots (1993–1996), New York Jets (1997–1999) and Dallas Cowboys (2003–2006).Parcells, who won 2 Super Bowls with the Giants in 1986 and 1990, earned a reputation for turning teams that were in a period of decline into postseason contenders.