Heading into Championship Sunday I looked at these two matchups and how things might play out. Instead of trying to preview one of them and pointing out schematic advantages and disadvantages like I did a week ago, I decided to present one X-factor for each team on offense and defense respectively. I believe these are truly the four best teams in the league when I combine players and coaching. There might have been more talented teams on paper, but when I look at these four head coaches and their staffs I think we are blessed with some of the very best play-callers and guys who excel at preparing their troops. So which players for each of them, who don’t usually play a primary role, could be key factors on Sunday?