Don Brown let out a sigh and a trailing “you know” before pausing. Standing in the Schembechler Hall lobby last week, he had just been asked for his assessment of his defense through two weeks. The indecision in his initial reaction continued throughout his answer as he shuffled between positives and negatives, resistant to any grand declarations. The evidence for each came naturally. In its first two games, every regulation touchdown that Michigan’s first-team defense allowed came off a turnover. And yet, the Wolverines were 50th in Division I with 21 points per game allowed despite not facing a Power Five team. All of that, though, was before the bye week. “We haven’t been playing the best football we can play,” said senior safety Josh Metellus. “And we know that we’ve got guys in this building whose potential is way up here. We’re not reaching that.” A bye week, of course, isn’t some magic cure. Wisconsin had one of its own and was off a start in which it outscored opposition, 110-0. Still, it’s an opportunity for Michigan to look itself in the mirror and diagnose what went wrong in its underwhelming start. The Wolverines will hold most of that diagnosis close to their chest until Saturday, but junior defensive tackle Donovan Jeter’s return to full health is one piece of the puzzle that can’t be hidden.