The Ohio State defense currently leads the nation, allowing just 6.8 points per game. But there are still a number of questions surrounding Jim Knowles' unit after its first Big Ten game of the season. 

Ross Fulton, the Xs and Os guru at BuckeyeHuddle.com joins host Tom Orr to discuss some of the areas that have OSU fans concerned, including:

• Why the Buckeyes are playing so much 4-3, when that means taking standout nickel Jordan Hancock off of the field
• Why the Buckeye secondary played so much off coverage last weekend, giving MSU receivers a free release at the line, and leading to some big pass plays
• Whether some of the big plays the Buckeyes allowed were a function of shaky scheme, or bad execution
• And much more