Experience Abounds Up Front for UNC Offensive Line Posted Aug 15, 2016 North Carolina’s offensive line is four years in the making. Fifth-year seniors Jon Heck (right tackle) and Caleb Peterson (left guard) arrived at UNC in 2012, and were followed a year later by center Lucas Crowley. Since then, the trio of seniors have started a combined total of 102 games and their relationships have extend beyond that of teammates. (Inside Carolina)