‘Fox was enjoying a round of golf on a brisk Wednesday morning in February when his cellphone rang. The caller, Bills general manager and president of football operations Brandon Beane, is a close friend. They’ve known each other since 2002, when Fox became head coach of the Carolina Panthers and Beane was a young, eager employee in the team’s football operations department. Beane introduced Fox to the other voice on the line, Joe Brady, whom the Bills had promoted a few weeks earlier to replace Sean McDermott as head coach.’