COLUMBUS, Ohio -- Breaking down the positions and players who have the most to prove as No. 2 Ohio State opens the season on Saturday against Buffalo (TV: ESPN2, noon).

FIRST DOWN: Defensive tackles

The broken bone in Tommy Schutt's foot has thrown another wrench in the rebuilding project for the Buckeyes up front, and they reacted to it swiftly by shuffling Chase Farris back over to defense from the offensive line.

Schutt wasn't listed as a starter on the depth chart for the opener, but the sophomore impressed in limited action last season and had turned in a productive training camp before the injury bug bit him again on Monday. The Buckeyes know what life is like without Schutt after ankle issues limited him throughout spring, but for a unit that is replacing all four starters, having everybody healthy and ready to contribute was obviously important.

Ohio State has no shortage of confidence in Noah Spence and Adolphus Washington at end, but in some respects Joel Hale and Michael Bennett are still unknown quantities despite having been in the program for a couple years. Now with Schutt out and Farris moving to fill the void, the pressure is ramped up for a newcomer such as Michael Hill or sophomore Chris Carter.

SECOND DOWN: Freshmen skill players

The Buckeyes have no shortage of pieces returning from the Big Ten's best offense a season ago, but it's the fresh additions that figure to allow Urban Meyer to truly unleash his spread attack this fall.

They still have to prove themselves in a game though, and Dontre Wilson, Ezekiel Elliott and Jalin Marshall are all likely to touch the ball a few times as the Buckeyes evaluate what they have in what is shaping up to be an offensive class capable of making an early impact.

Wilson, in particular, could get his hands on the football right away with Ohio State trotting him out to return kickoffs. His electric speed could be put on display early, but the Buckeyes will really be watching him closely in the H-back role as they try to add more diversity to the playbook.

THIRD DOWN: Cornerbacks

The starting job Armani Reeves is filling this week is only temporary, and the sophomore is well aware of that. But he's got a huge opportunity to impress with Bradley Roby sitting out his one-game suspension, and potentially down the road it might help him make a push for the other first-team job at cornerback.

Doran Grant has something to prove himself after playing minimally in reserve of Roby and Travis Howard a year ago, so the junior bears monitoring as well as he transitions into the starting lineup. There hasn't been any question about the pecking order since spring -- with Roby and Grant leading the way for a talented, deep secondary -- but only one career start separates Grant from Reeves. Both would benefit from making a strong first impression against the Bulls.

FOURTH DOWN: Braxton Miller's arm

The reviews have been overwhelmingly positive for the junior's development as a passer, and he publicly lobbied after practice to air the ball out at least 25 times -- then joked that he would call his own plays to get to 30.

If Miller is eager to show off the improvements he's made mechanically both in terms of accuracy and his footwork, the Buckeyes would certainly like to get a gauge of how far he's come in a meaningful setting as well.

There's been little doubt since a productive spring game that Miller is sharper and more confident delivering the football, and he's only had more time to fine tune his arm since then. The Buckeyes were far from a balanced offense last season, rushing twice as often as they passed, with Miller's skills as a runner helping drive up the margin.

But if his arm has managed to make up some ground with his feet, the offense could be unpredictable with what it could do on any down, making it a nightmare to try to defend.