It is hard to win in the NFL, let alone winning consistently. These head coaches have the best winning percentages of all time.
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Guy Chamberlain: .784
Chamberlain coached six seasons from 1922-27. He went undefeated in his first two seasons with the Canton Bulldogs, starting his coaching career at age 28. The Bulldogs moved to Cleveland in his third season, then he went onto coach the Frankford Yellow Jackets and Chicago Cardinals, finishing his coaching career with four NFL Championships and a 58-16-7 record.
Now best known for his broadcasting career and the video game that bears his name, Madden coached the Oakland Raiders for 10 seasons from 1969-78. He had a winning record in every season, won one Super Bowl, and finished his career with a 103-32-7 record.
Widely considered the best football coach ever, the man who the Lombardi Trophy is named after coached nine season in Green Bay, and one year in Washington. He won three NFL Championships and two Super Bowls, finishing his career with a 96-34-6 record.
Harbaugh's time in the NFL was brief and tumultuous but extremely successful. He turned the 49ers into winners over his four seasons, and lost Super Bowl XLVII to the Ravens and his brother, John. He left for Michigan following the 2014 season with a record of 44-19-1.
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Tommy Hughitt: .694
1913 University of Michigan yearbook
Hughitt coached five seasons from 1920-24 with the Buffalo football franchise. He finished his career with a 34-15-7 record, mostly due to a pair of nine-win seasons over his first two years.
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Blanton Collier: .691
Henry Barr Collection / Diamond Images
Collier coached the Cleveland Browns from 1963-70. The Browns won the NFL Championship in 1964, and Collier reached 10 wins five times in his eight seasons.
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Ray Flaherty: .684
Nate Fine / Getty Images
Flaherty coached 11 seasons between the Redskins, New York Yankees, and Chicago Hornets from 1936-1949. He won two NFL Championships with the Redskins.
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George Halas: .682
Sporting News Archive / Sporting News
One of the most famous NFL head coaches ever, Halas led the Bears (formerly the Staleys) for 40 seasons. He won six NFL Championships and finished his career with a record of 318-148-31.
Shula coached 33 seasons in the NFL, seven with the Baltimore Colts and 26 with the Dolphins. He won one NFL Championship with the Colts and two Super Bowls in Miami. Shula is best remembered for leading the NFL's only undefeated team, the 1972 Dolphins, who finished the season 17-0 following their Super Bowl win.
Widely regarded as the greatest modern-day NFL coach, Belichick is still going strong in his 17th season with the Patriots. He also coached the Browns for five seasons from 1991-95. Belichick has won four Super Bowls and has 16 consecutive winning seasons with the Pats.
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Paul Brown: .672
Nate Fine / Getty Images
The legendary Brown coached the Cleveland Browns for 17 seasons before going onto the Bengals for eight years. He won seven championships, including a five-year streak in his first five seasons.
Dungy coached 13 seasons in the NFL between the Buccaneers and Colts. After turning the Bucs into winners over six seasons, he made the playoffs in all of his seven seasons in Indianapolis and won one Super Bowl. He has a 139-69 career record.
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Jim Lee Howell: .663
Howell led the Giants from 1954-60 with seven winning seasons. New York won the NFL Championship in 1956.
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Roy Andrews: .654
Coaching in the NFL from 1924-31, Andrews had a 51-27-4 record for Kansas city, Cleveland, Detroit, New York, and Chicago.
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Mike McCarthy: .651
Kirby Lee / USA Today Sports Images
With the help of quarterback Aaron Rodgers, McCarthy has nine winner seasons in 11 yards in Green Bay along with one Super Bowl. He's led the Packers to the playoffs in eight consecutive seasons.
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George Seifert: .648
Seifert followed up Bill Walsh's reign in San Francisco, going 98-30 with two Super Bowl wins in eight years with the 49ers. He also coached three years with the Panthers, but his coaching career ended with a 1-15 season in 2001, or else he would have been a bit higher on this list.
Arians has led the Cardinals to the playoffs in two of his four seasons, though he also went 9-3 in 12 games as the Colts interim head coach in 2012. His 7-8-1 record in 2016 was his first losing season.
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Paddy Driscoll: .646
Driscoll coached five NFL seasons over a long timeframe. He coach the Chicago Cardinals from 1920-22, and the Chicago Bears in 1956-57, coaching 53 games over his career.
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Red Miller: .645
The Denver Post
Miller led the Broncos from 1977-80 and had three winner seasons, along with a Super Bowl appearance.
Pittsburgh's current head coach has yet to have a losing season over 10 years, and he has one Super Bowl victory in two appearances. Tomlin's Steelers, led by quarterback Ben Roethlisberger, have won at least 10 games seven times.
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Curly Lambeau: .631
The Lambeau of Lambeau Field fame coached in Green Bay for 29 of his 33 seasons as a head coach, and won six NFL Championships. He left coaching with 226 career wins.
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Barry Switzer: .625
Stephen Dunn / Getty Images
Inheriting a loaded Cowboys roster after Jimmy Johnson and Jerry Jones parted ways, Switzer won one Super Bowl and had three winning seasons over four years. He was fired after going 6-10 in 1997.
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Mike Martz: .624
Joe Robbins / Getty Images
Martz took over the Greatest Show on Turf in St. Louis after Dick Vermeil temporarily retired. He made the playoffs four times, and the Rams were upset by New England in Super Bowl XXXVI. He was unceremoniously fired after five games in his sixth season.
Cowher went 149-90-1 in his 15 seasons with Pittsburgh and appeared in two Super Bowls, winning one. The Steelers had only three losing seasons over his career.
Seth Trachtman is a fantasy sports expert and diehard Kansas City Chiefs fan still hoping for a Super Bowl win during his lifetime. He doesn't often Tweet, but when he does, you can find him on Twitter @sethroto.