Chuck Noll won four Super Bowls and presided over one of the greatest football dynasties in history, the Pittsburgh Steelers of the ‘70s. Later inducted into the Pro Football Hall of Fame, his achievements as a competitor and a coach are the stuff of legend. But Noll always remained an intensely private and introspective man, never revealing much of himself as a person or as a coach, not even to the players and fans who revered him. Chuck Noll did not need a dramatic public profile to be the catalyst for one of the greatest transformations in sports history. In the nearly four decades...