UNC was the first school to offer Appel, a 6-foot-6, 300-pound offensive lineman from Arlington (Va.) Bishop O'Connell.
"To begin with I love the coaching staff, you can get a really good education there, [and] I love the commitment and work that's put into the program," Appel said.
Appel rose up UNC's recruiting board after attending the Tar Heels' three-day camp in June.
"After working with Coach Pittman there, that was probably the biggest reason I choose to go [to UNC]," Appel said. "He treats his players well. He's focused. He's dedicated. He's just a great guy on and off the field. He knows what he's talking about – he's been in the game for a long time. He's not only a great coach, but a good friend to have."
Before offering Monday, Pittman explained what he and the rest of the UNC coaching staff liked in Appel.
"He said he liked my worth ethic, the kind of guy I was, and he liked the grades I get," Appel said.
Pittman is recruiting Appel as a versatile offensive lineman with the ability to play both guard and tackle.
As a junior, Appel started at left tackle for O'Connell. This fall, he started both ways – right tackle and defensive end.
UNC now has four verbal commitments – three are from offensive linemen.