Johnson is expected to be at the Orlando school until Saturday.
The 6-foot, 216-pound Johnson played in 10 games last season as a freshman at Miami. He ran for 119 yards on nine carries. The Loganville, Ga., product was ranked as the nation's No. 22 overall recruit by ESPN in the class of 2010.
Johnson would have to sit out the 2011 season as per NCAA transfer rules, but he does have a redshirt season available. Besides UCF, he is also rumored to be considering Georgia, Alabama and Purdue.
Bruce Feldman is a senior writer for ESPN The Magazine.