NFL draft preview: Defensive line

Danny Shelton works out at Washington’s Pro Day.   (Elaine Thompson / AP)

Florida State defensive lineman Mario Edwards responds to a reporter’s question during a news conference at the scouting combine.   (Doug McSchooler / AP)

Jordan Phillips works out for NFL scouts during Oklahoma Pro Day.   (Sue Ogrocki / AP)

Rice’ Christian Covington tackles UTEP’s Blaire Sullivan.   (Thomas B. Shea / Getty Images)