Guerrieri played four years at Davidson where he started at safety, was a captain in his senior year for the Wildcats and was a three-time All-Pioneer Football League Honor Roll selection.
[2] Guerrieri started out his coaching career as a graduate assistant for Lenoir–Rhyne for one season.
[6][7] After coaching a total 10 years for Duke, he would leave for Ohio State to be a senior advisor and analyst for the Buckeyes.
[8][9] After one year with the Buckeyes, Guerrieri would be hired as the co-defensive coordinator and safeties coach for the Indiana Hoosiers.
[10][11] After one season with the Hoosiers, Guerrieri returned to the Buckeyes to become the safeties coach.