North Carolina has had Warren on its radar since his freshman season. But the Tar Heel staff ramped up its interest starting in June, then tracked him closely in July, most recently at the Super Showcase in Orlando, Fla.
"He basically told me that I have a scholarship there and he wants me to come in and score the basketball to the best of my ability," he added. "He wants me to be a big time player."
How did the 6-8 rising senior forward react when he picked up the offer?
"When he offered me I was real excited," Warren said. "It felt good. That's everybody's dream school, to go to North Carolina. That means a lot to me."
During the visit Warren, a Durham, N.C. native who will attend Wolfeboro (N.H.) Brewster Academy for his senior season, got the full tour.
"I sat in his basketball office and got a whole tour of the facility," Warren said. "Coach Roy showed me around the Smith Center arena and I saw everything and the locker rooms and stuff. It was nice."
UNC currently has commitments from point guard Marcus Paige and wing J.P. Tokoto. The Tar Heel coaches talked to Warren about fitting into UNC's 2012 class as a combo forward.
"They want me to play the combo at the three or the four, basically whatever the matchup is," he said.
"They want me to fill the Harrison Barnes role as a do-it-all-forward and just go out there and be a basketball player and do everything," Warren added.
Warren said he's actually developed a relationship with Barnes and the two keep in contact quite a bit.
"I've been talking to Harrison for a while now," he said. "We caught up and everything. We had so many flights back to North Carolina so we've been talking. He texts me sometimes."
To go with his interest from Carolina, Warren also has offers from Florida, Georgetown, Kansas Kentucky, Louisville, NC State, (where his father played), Ohio State and Texas.
"I'm wide open so I'm just taking it all in," Warren said. "I've been having a great summer. I'm just going to weigh my options and see what happens."
With strong interest coming in from a number of high major programs, Warren said he'll take additional visits and is then looking to make a decision at the end of the year.
"I'm thinking towards Christmas or sometime around there."