"My four years will be at the University of Clemson," said Alexander on ESPNU.
The Clemson coaching staff was one of the main reasons Alexander chose the Tigers.
Dabo Swinney, he's a good guy," said Alexander, who chose Clemson over Auburn and Mississippi State. "He's a church guy like me. He made it from the bottom to the top."
"His staff coach – Coach (Brent) Venables and Coach (Mike) Reed – I trust those guys. I'm going to be in a great position."
Alexander is a four-star prospect and the 7th-ranked cornerback in the country.