After arriving Friday, Underwood stopped by Duke to speak with a member of its coaching staff and quickly toured the campus.
The rest of Friday was spent in Chapel Hill, with Underwood meeting UNC's entire coaching staff and touring the facilities.
"I learned more about UNC's coaching staff," Underwood said. "I didn't really know them all that well [before the visit]. They told me how they ran things. They told me they're like a pro style coaching staff."
Underwood spoke the most with UNC's receivers coach Charlie Williams, who projects Underwood as a slot receiver.
"[We talked about] the plays and how they were going to use me in the offense if I came in," Underwood said.
Following his junior season, Underwood received All-League First Team honors at receiver after catching 40 passes for 573 yards and seven touchdowns. He also returned 19 kicks for 396 yards and a touchdown.
Before leaving campus Friday night, Underwood had an opportunity to meet several UNC players. Fellow Ohio natives Richard Quinn and Charlie Brown were among the current Tar Heels Underwood spoke to extensively.
"They told me about the practices, what the coaches expect from them, and how the coaches help them improve," Underwood said.
Underwood admits that having Brown and Quinn on UNC's roster will only help the Tar Heels' chances.
"They don't stretch the truth," Underwood said. "They'll tell me straight up about how UNC actually works."
Underwood watched a scrimmage at NC State on Saturday and also received a tour of the facilities there.
Since his flight didn't leave until Monday morning, Underwood spent Sunday exploring the Triangle Area on his own.
Following the weekend's three unofficial visits, which were the first of his recruitment, Underwood still isn't any closer to naming favorites.
"They're all equal," Underwood said. "I'm just sitting back, going to different campuses and checking everything out."
He is in the process of working out his next unofficial visit – a trip to Morgantown to check out West Virginia.
Over the summer, when he expects to have the majority of his visits completed, Underwood figures to have established a favorites list. He doesn't anticipate making a verbal commitment until the fall.