Jordan Parsons was 25 with 13 fights as a pro and three more from an amateur career that started when he was just 17. He’d spent a little less than a decade inside MMA gyms had only suffered one loss via knockout. Still, when researchers cut open his brain after Parsons died as a result of injuries sustained in an alleged hit-and-run accident earlier this year, they found the telltale signs of chronic traumatic encephalopathy – or CTE – the degenerative brain disease that has plagued athletes in other contact sports from football to boxing to hockey. Surprised?