NORTH CAROLINAWho's Gone: Jonathan CooperWho's Next: Caleb PetersonThe Tar Heels had three players up front selected in the NFL draft, and while they'll still feature four players with game experience this season, the guy taking over for an All-American left guard isn't one of them.Peterson has yet to take a snap in college as a redshirt freshman, but he does have size at 6-foot-3, 310 pounds, and Larry Fedora was impressed with his development, but as the Tar Heels coach said, "He still has a long way to go, and he understands that. He is an athletic young man ... has great strength, working on his feet and quickness. I think he really came on and did some nice things."He'll get the unsavory bonus of opening against South Carolina and the most dominant defensive player in the nation in Jadeveon Clowney. With James Hurst, a four-year starter, at left tackle, expect Peterson to get tested early and often.