FILE - This Oct. 17, 2010, file photo shows Philadelphia Eagles wide receiver DeSean Jackson (10) being helped off the field after an injury during the first half of an NFL football game against the ... more 
FILE - This Oct. 17, 2010, file photo shows Philadelphia Eagles wide receiver DeSean Jackson (10) being helped off the field after an injury during the first half of an NFL football game against the Atlanta Falcons, in Philadelphia. In a series of interviews with The Associated Press, representatives of the NFL, the NFL Players Association and the four equipment companies that make every helmet worn in the league all agreed there's no such thing as a football helmet that eliminates concussions _ nor is one on the way anytime soon. less 
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Associated Press | Photo By Mel Evans, File
Mon, Nov 15, 2010 12:41 PM EST