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Cincinnati Reds Ryan Freel slides safely home under a leaping Brent Mayne of the Los Angeles Dodgers at Great American Ballpark in Cincinnati, Ohio on August 10, 2004.

Recently, former Major League Baseball player Ryan Freel became the first in the league to be publicly diagnosed with chronic traumatic encephalopathy (CTE) as a result of the numerous concussions he suffered over the course of his career before he committed suicide last year.

Dr. Robert Cantu, co-director of the Boston University Center for the Study of Traumatic Encephalopathy, joins the show to discuss how prevalent this brain disease could be in baseball and how CTE could be diagnosed in the future.