Fannin led Lovejoy high school to a region 4-AAAAA title in 2004 as a junior at quarterback, but is projected to play either running back or safety at the collegiate level.
He will get his first chance at Auburn as a tailback, joining Benjamin Tate as the only two running back prospects to sign with the Tigers' in 2006.
Fannin will be joined in Auburn by Lovejoy teammate Byron Isom, a defensive lineman who (is also expected to sign with Auburn/has already signed with Auburn.
Fannin (center) is shown with his parents at Lovejoy High on Tuesday night at a school commitment ceremony.
"I can't wait to get down to Auburn and get started," Fannin said. "I am coming down this summer to get started early."