- Josh Moyer, ESPN Staff Writer
Welcome to NittanyNation's bi-weekly mailbag! We asked you to tweet your questions this week, and we've selected three to answer in-depth -- starting with the question we received most.
Scott Reading (@7reading7) writes: What will be the biggest challenge for O'Brien this upcoming season? I feel it'll be the secondary.
Josh Moyer: Well, the secondary certainly isn't a bad choice. But with both safeties returning and another year under Adrian Amos' belt, I think we can all agree they should be improved overall from last season. But it's definitely far from a strength.