Dave Duerson Hockey players Derek Boogaard and Bob Probert. Football players John Grimsley, Chris Henry, and Junior Seau. Wrestler Chris Benoit. What do these men have in common? Like Dave Duerson and dozens of other former NFL players, all are professional athletes whose brains, after their deaths, displayed telltale signs of chronic traumatic encephalopathy, or CTE (Gavett & others, 2011; Tartaglia & others, 2014).
Michael J. Minardi/Getty Images