"I called him and he gave me the news," Winslow said. "I was happy to pick up the offer from a great program like that. We talked a little about personal stuff and how he wants me to come to North Carolina."
Williams and his Tar Heel coaching staff watched Winslow extensively during July, first at the Peach Jam in North Augusta, S.C. and then the following week at the Las Vegas Classic.
UNC joins an offer list that includes Arizona, Baylor, Duke, Florida, Ohio State, Texas, Texas A&M, UCLA and others.
Winslow took an unofficial visit to UNC on Feb. 18.
"The tempo under Kendall Marshall was really good; he always found the open shooters," Winslow said. "It seems like they always have point guards who can do that. They feed the post and really get out in transition, which is something I really like."
Winslow is ranked the No. 2 small forward in the 2014 class by Scout.com.
"He's a guy that affects the game in so many ways," Houston Hoops coach Tim Schumacher said. "He makes winning plays and that's the key thing about Justise Winslow, he'll do whatever it takes to win. He's one of the top athletes in the country, but his IQ as a ball player is off the charts. He's very athletic, but he's also very smart – he understands how to play the game the right way."
After being named one of the top performers at the Peach Jam, Scout.com's Brian Snow authored the following evaluation: "An elite player, Winslow is so solid in every single aspect of the game. Winslow plays on the ball a lot, and is a point forward who is excellent at creating for himself or others. Also he is a better than advertised athlete. More so than anything, Winslow loves to win and will do everything for his team. Just such a solid fundamental player, his understanding of the game creates a ton of opportunities for his team."
(Josh Gershon contributed to this report)