Walker is one of nine starters returning on a defense that held opponents to less than 12 points per game in 2011. This fall, the 5-foot-10, 170-pound cornerback plans to build on the success he had during a junior season in which he picked off three passes and broke up 14 others.
"My job is to shut down my side of the field," Walker said.
The UNC coaching staff envisions Walker doing the same for its defense once his high school years are over.
Since committing to UNC in March, the communication between Walker and the Tar Heel staff has changed slightly. Prior to his pledge, Walker's contact with UNC was almost exclusively with Gunter Brewer, his primary recruiter. Since then, Walker has begun to talk more with future position coach, Dan Disch.
"I still talk to Coach Brewer," Walker said. "We talk a lot just about the team, school – stuff like that.
"Coach Disch and I have talked and we're attempting to start up a relationship. Pretty much, we talk about the plans for me when I get there, how my team looks for this season."
In spite of his verbal commitment, outside schools have continued to pursue Walker.
"A couple of other schools have been contacting me, but I haven't really visited anywhere else," Walker said. "I'm pretty much very solid to Carolina."
The only school Walker is looking to visit this fall is UNC.
"I want to go to the campus more on the weekends," Walker said. "I really want to see them play Georgia Tech and Virginia Tech – those are the key games I want to see."
Walker most recently visited UNC a couple weeks ago when Mallard Creek participated in UNC's 7-on-7 passing tournament. He also was in Kenan Stadium for the Tar Heels' Spring Game in April.