UNC's Defensive Line Banking on Depth Posted Aug 10, 2014 North Carolina is counting on its defensive line’s depth to overshadow the lack of a brand name and recent attrition. Robert Quinn. Quinton Coples. Sylvester Williams. Kareem Martin. Those recent Tar Heel defensive linemen will be playing on Sundays this fall. The names the casual fan will hear at Kenan Stadium on Saturdays won’t roll off the tongue with such familiarity. (Inside Carolina)