How Falcons' A.J. Terrell went from mediocre first-round cornerback to franchise cornerstone

Thanks in part to film study instilled by his college position coach, Atlanta's A.J. Terrell is a rising star at the valued cornerback position.
https://www.espn.com/nfl/story/_/id/32771372/how-falcons-aj-terrell-went-mediocre-first-round-cornerback-franchise-cornerstone?utm_source=dlvr.it&utm_medium=blogger