You don't have to be a football fan to understand that the hits that players regularly take to their heads and bodies have the potential to be extremely damaging. Yes, they wear helmets and more padding than most other professional athletes. But the effects of a concussion can be life-long, according to a class action lawsuit filed by a number of NFL players.

The football players say they have developed mental and physical problems from the concussions they suffered over the course of their careers. Their lawsuit, which also names several of their spouses as plaintiffs, alleges that the NFL and the manufacturer of their helmets concealed the risks associated with head injuries.