The 6-foot-4, 175-pounder is a four-star prospect and FOX Sports Next's No. 4 shooting guard in the country.
FOX Sports Next national recruiting analyst Evan Daniels had this to say about Thornwell following the EYBL Dallas event: "At this point, he's been written about quite a bit this spring, but Thornwell, a 6-foot-4 guard out of Lancaster (S.C.) High, has earned every bit of the ink. Thornwell has turned himself into one of the premier wing scorers in the class. His mid-range game is on point, as he's capable of scoring off one and two dribble pull-ups, plus he's tough and strong enough to finish through contact at the rim. He put up 18 points and eight boards in a win over the Georgia Stars."
An abundant of Atlantic Coast Conference schools have already offered the Lancaster (S.C.) High School product a scholarship. One of the Southeastern Conference suitors is Tennessee.
"Me and (Tennessee) coach (Cuonzo) Martin, we're cool, we're close," Thornwell told InsideTennessee last month. "He's been recruiting me since he got the job, probably two weeks after. But, he's a good coach. He did a good job for his first year here at Tennessee.
"I like the way they play, they get after it, pick-and-roll style. They let you play. They don't really hold you back. They play that Flex offense, Motion offense. So, they really let you do what you can do."
To get a look at Thornwell in action this spring, scroll down through the images from InsideTennessee below: