NFL Concussion Lawsuit: Clinton Portis, Cadillac Williams, Daunte Culpepper Suing NFL For Hiding Impact Of Head Injuries

Concussions have become a major headache for the NFL. A new lawsuit being filed by Clinton Portis, Carnell "Cadillac" Williams and Daunte Culpepper, along with 80 other ex-players may upgrade it to a migraine.