Sean Morey's 10-year career as a special teams ace came to an abrupt halt in 2010 when "post-concussion syndrome" forced his retirement. Even though he was no longer playing, he told Sports Illustrated that he felt like he had just "made six or seven tackles." His experience led him to donate his brain to the CSTE. "One of the most profound actions I can take personally is to donate my brain to help ensure the safety and welfare of active, retired, and future athletes for decades to come." Morey, 35, said in a written statement.