UNC ‘Right on Target’ with Defensive Line Usage Rates Posted Sep 9, 2024 The sample size consists of two games and thus is far from comprehensive, but defensive coordinator Geoff Collins considers UNC to be hitting the mark so far this football season with Mack Brown's long-held intentions of rotating through more defensive linemen. The Tar Heels used nine players on the defensive line during their victory at Minnesota. (Inside Carolina)