The highest winning percentage of any coach with at least 50 NFL games belongs to Guy Chamberlin, who won .784 percent of his games from 1922-27. John Madden is the modern-era leader at .759. Only four coaches ever are over 70 percent.
Matt LaFleur's winning percentage sits at .800 through 45 games. After the Arizona Cardinals' loss on Monday night, LaFleur also leads the team that owns the No. 1 seed in the NFC with four games to go. He has been really good.
When we talk about the Green Bay Packers, LaFleur rarely is mentioned as one of the key figures in their success.