Growing up in Tyrone, GA and nearly having his athletic career cut short by a diagnosis of Osgood-Schallter in high school. Hall of Famer Calvin Johnson reveals the truth behind his 40-yard dash at the 2007 NFL Scouting Combine and breaking Jerry Rice's single season receiving yards record in 2012. Calvin talks about his decision to retire in 2015 and the creation of Primitiv Group.
