Tom Brady and Ben Roethlisberger are the two quarterbacks that have the best winning percentage in their first 4 years in the NFL. Ben Roethlisberger has the fourth highest career winning percentage as a quarterback.
New England Patriots
New York Giants!!!
The New England Patriots have the best win percent since 2011, with a 3 season average winning percentage of .771.
Through the 2010 season, it's the Chicago Bears. They have a record of 704-512-42 for a winning percentage of .579.
The top winning percentage of the 1980s in the NFL was the San Francisco 49ers. They won 68.4% of their regular season games. 2nd was the Washington Redskins at 63.8%.
the colts have the highest winning precentage
According to today's Baltimore Sun, "The Steelers have the best home winning percentage (.722) in the NFL since 1970." http://www.baltimoresun.com/sports/football/bal-ravensscout0928,0,734965.htmlstory Must be a steelers fan since he doesn't include the year 66,67,68,69 in which the Steelers were terrible. Include those numbers and the steelers do not have the best home winning percentage. Since 1966 the Kansas City Chiefs have the best winning percentage followed by the Packers.