WASHINGTON – OCTOBER 28: Former National Football League player Brent Boyd (C) rubs his head while sitting next to NFL Commissioner Roger Goodell (R) and Pro Football Hall of Fame player Willie Woods (2nd L) during a hearing of the House Judiciary Committee about football brain injuries on Captiol Hill October 28, 2009 in Washington, DC. A recent study of retired players suggested that N.F.L. retirees ages 60 to 89 are experiencing moderate to severe dementia at several times the national rate. Boyd suffers from headaches, depression, fatigue and dizziness caused by what his doctors diagnosed as post-concussion syndrome. According to Wood’s guardian, former NFL player Robert Schmidt, Wood is a “living, breathing example of the issues of concussions and their correlation with dementia.” (Photo by Chip Somodevilla/Getty Images)