McKenzie added he will trim five schools from his list and release a Top 10 in early May.
For now, though, McKenzie said his top 15 are Georgia, Tennessee, Virginia Tech, Florida State, Pittsburgh, Oklahoma, Georgia Tech, Michigan, Michigan State, West Virginia, North Carolina, Vanderbilt, Wisconsin, Arkansas and South Carolina.
In discussing his recruitment last week, McKenzie detailed some of the characteristics he was looking for in a school.
"Education and depth chart," McKenzie said were two key factors. "I'm looking to see how many people are at my position. I'll look at how good my relationship is with the coaches. The area doesn't really matter. It's basically just the best fit."
He is coming off a junior season in which he rushed 2,689 yards and 41 touchdowns.