Ohio State's Boren sprains knee in practice

Posted by ESPN.com's Adam Rittenberg

Ohio State will be without arguably its top offensive lineman for several weeks as left guard Justin Boren sprained his knee during Friday's practice.

A source tells ESPN affiliate Web site Bucknuts.com that Boren will be out for no more than three weeks with a sprained MCL. So no major damage done, though the preseason is always a critical time for an offensive line to jell, especially one coming off a subpar season. Boren, a transfer from Michigan, was Ohio State's most impressive lineman this spring and set a tone for the group.

Reports say Boren should be fine for the season opener Sept. 5 against Navy. Junior Connor Smith likely will slide into the starting spot while Boren recovers.