Boston College coach Bill O'Brien spent time with UNC's Bill Belichick in the NFL. Here's what O'Brien said about Belichick's move to college.

Belichick avoided the rows of radio reporters in the hotel lobby and spent much of the morning in a hallway outside the green room for players and coaches, down the hall from private rooms for interviews with ESPN.com, SiriusXM and the ACC Digital Network.

A chronically struggling unit for years, North Carolina's defense has a new training regimen with Bill Belichick as head coach.