Posted by ESPN.com's Chris Low
Tennessee received word Thursday that one of its key signees, defensive tackle Marlon Walls, had been certified by the NCAA Clearinghouse and was cleared to begin practice.
Walls spent last season at Hargrave (Va.) Military Academy and has bulked up to 290 pounds after being recruited as a linebacker out of high school. The Vols need more depth at tackle, and even though Walls has missed the first part of preseason camp, he gives them another big, athletic body in there.
Senior Dan Williams should be one of the better interior defensive linemen in the league. But after him, it gets dicey for the Vols inside. Senior Wes Brown has battled persistent knee problems, while Rae Sykes and Montori Hughes will both be making their SEC debuts this season along with Walls.
Sykes, a junior college newcomer, recently made the move from end to tackle.