That is because in the NFL 99% of the players can walk down the street and not be noticed by anyone other than "wow, that guy is huge". Guys that are elite players are basically no one unless they play quarterback or running back. How many people could pick Calvin Johnson out of a lineup of just headshots? My guess would be not many. The time these guys are seen, they are wearing helmets that cover their entire head and face. Shawne Merriman was one of the absolute best players in the league for several years, but you don't consider him a marquee player. Why? Because he plays defense and isn't named Ray Lewis. The NFL has two and a half glory positions. Quarter, running back and a wide receiver here or there. If you play any of the other 20 positions on the field hardly anyone cares about you.