​In a recent CBS Sports ranking of the greatest NFL coaches of all time, New York Giants legend Bill Parcells placed 13th, underscoring his transformative impact on the franchise and the league.Parcells, a Hall of Famer, revitalized struggling teams four times during his career, with his most notable achievements coming in New York. He guided the Giants to Super Bowl victories in 1986 and 1990.If you need a coach to jumpstart your franchise, Bill Parcells is your guy. Four times during his Hall of Fame career, Parcells turned a struggling team into a contender in short order. His biggest success came with the Giants, whom he led to titles in 1986 and 1990.Upon graduating from college, Parcells climbed the coaching ranks until he temporarily stepped away from football. During that time, Parcells — who lived in Colorado — attended Broncos games as a fan before he decided to get back into coaching. During his first job back in football (as the Patriots’ linebackers coach), Parcells was given the nickname “Big Tuna,” which stayed with him for the remainder of his coaching career.The Giants elevated Parcells from defensive coordinator to head coach in 1983. But after a losing first season, rumors spread that Parcells would likely be fired if the Giants had another bad season in 1984. The Giants, however, responded by advancing to the NFC divisional round.The 1986 title featured a standout performance from quarterback Phil Simms, while the 1990 championship highlighted Parcells’ strategic brilliance, including a clock-controlling game plan and a stout defense in a 20-19 win over the Buffalo Bills in Super Bowl XXV.AdvertisementAdvertisementAdvertisementNotably, two former Giants defensive coordinators also earned high honors: Tom Landry at No. 10 and Belichick at No. 1.Belichick, who served under Parcells, contributed to the Giants’ defensive success in Super Bowl XXV before building his own dynasty with the Patriots.Parcells’ ability to quickly turn around franchises and deliver championships cements his legacy among the sport’s elite.This article originally appeared on Giants Wire: Giants legend Bill Parcells ranked among NFL’s all-time greatest coaches