Once upon a time, the NFL shaped its Draft policies (and date) around not angering college football. The power and popularity of The Shield have increased dramatically over the last four or five decades, but the league spent many of those years keeping underclassmen out as a default, and it took years of pressure from players like Barry Sanders, Cris Carter, and Herschel Walker to eventually open up a pro pathway for juniors. Why has the NFL shied away from taking on college football, and what has it meant to the college game to keep players trapped in one system for most of the sport’s history?Producer: Michael HenahanResearcher: Alex McDaniel