Harrell plays end in Catholic's Wing-T offense, but projects best elsewhere on the collegiate level.
"He has good feet [and] his film is very good," Charlotte Catholic assistant coach Kevin Christmas said. "We think he's probably going to be an offensive lineman in college. We use him more as a blocker and he's a great run blocker."
Since he is primarily used as a run blocker, Harrell works on pass blocking with Catholic's assistant coach Frank Garcia, who played nine seasons at offensive line in the NFL, throughout the practice week.
"Either before practice or after practice – there is always a time he's going to be working on pass blocking and he's learning from a professional," Christmas said.
Harrell was named to the All-Mecklenburg County first team following a junior season in which he helped Catholic rush for 4,904 yards and to a 14-1 record.
Back in October, Duke became the first school to verbally offer Harrell a scholarship.
"I went to their camp and they told me they were interested after the camp," Harrell said. "They started sending me mail in the fall."
Within the last week, Georgia Tech and Virginia have also offered Harrell. He's also receiving significant interest from Clemson, North Carolina, NC State, and Wake Forest.
Harrell is primarily being recruited as a tackle. The only school that has mentioned otherwise is Clemson, which projects him as a guard.
Besides Duke, Harrell has camped at Georgia Tech, UNC, and Wake Forest. He has also made unofficial visits to Duke, Clemson, Georgia Tech, and NC State.
Harrell has junior days upcoming to Virginia and Wake Forest, and plans to attend several camps this summer.
"I know Clemson wants me to come down to their camp – they told me that when I went down there to visit for the South Carolina game," Harrell said. "I'm going to try to go to some SEC camps [to] see how I match up to them and see what kind of talent they're looking for."
Harrell doesn't have a favorite schools list.
"I'd like to keep an open mind and to not pick any favorites right now," Harrell said. "But the schools that have offered, they're obviously on my mind. Every school is equal in my mind, though."
Harrell would like to narrow his focus to five schools by the end of the summer.
"Depth chart is definitely a factor," Harrell said. "Definitely academics is a big thing – football doesn't last forever. Overall, the coaches and the kids that go there – I want to enjoy myself when I go there."
Harrell also plays forward on Catholic's basketball team and handles the shot put on the track and field team.
Video provided by Jason Pughe of AthleteVault.com.