In an interview with NBC 5, Dallas Cowboys legend Tony Dorsett confirmed he has a degenerative brain disorder known as chronic traumatic encephalopathy. (Video still via NBC DFW)

WHAT IS 'CTE' ALL ABOUT?

theGRIO REPORT - There have been numerous reports in the past two weeks about the four former NFL stars diagnosed with early signs of a brain condition called chronic traumatic encephalopathy, or CTE.