Whiteside, a 6-foot-9, 195-pound big man, committed to Marshall on Saturday while in Huntington (W.V.) for an official visit.
"When I was sitting down and watching footage of their games I liked their style and felt that I fit in," Whiteside said.
Since the summer, Whiteside began gaining interest from a variety of schools because of his size, length and potential.
"I need to get a better understanding of the game," he said. "I can do that if I listen to my coaches"
Whiteside, a four-star prospect, is Marshall's first verbal commitment in the 2009 class.