Jeffrey S. Markowitz, DrPH, is an epidemiologist who has authored two books, Pigskin Crossroads: The Epidemiology of Concussions in the National Football League (NFL), 2010-2012 (2013), and Lost Seasons: Arrests, Suspensions, Career Chaos, and Mortality Among National Football League (NFL) Players (2016). From 1983 to 1992, Dr. Markowitz was an adjunct assistant professor of Public Health at the S...