He sat out the 2011 spring season to focus on academics.
Harrelson was an all-state wide receiver and cornerback at Oscar Smith High School and recorded three catches during his first two seasons at UNC. He also returned 11 kickoffs his sophomore season (averaging 23.0 yards per return).
With a loaded roster of talented wide receivers entering 2011, and depth concerns at cornerback heightened by the injury to starter Jabari Price, Harrelson moved to cornerback during preseason camp.
He was listed third on the UNC depth chart at right cornerback for Saturday's game against Virginia.