Urban Meyer led the Ohio State Buckeyes to one of the more improbable undefeated seasons in 2012, guiding the Buckeyes to a perfect 12-0 season despite obvious flaws.
Now with the Buckeyes eligible for postseason play, OSU appears poised to repeat the feat. But it's tougher to go undefeated the second time around.
The Buckeyes appear to be one of the best teams in the country, but do have legitimate problems that could derail a second straight perfect season.
None of these things in particular have to do with any opponent, particularly in-conference foes Northwestern, Wisconsin and Michigan, but rather with Ohio State's own development.
Here are some things that could threaten another run for perfection.