Here is this week's mailbag. If you'd like to submit questions, send them to me via Twitter: @BFeldmanESPN.
From chucktodd: There's always a "surprise" top 5 team no one knows now, usually anchored by a senior-laden offensive line. This year's candidates?
A few of these are further off the radar than others, but I'll go with the Wisconsin Badgers for the reason you hit on (savvy O-line), plus they have a rugged big back in John Clay, a sharp QB (Scott Tolzien) and a versatile TE (Lance Kendricks) -- and they get the conference favorite (OSU) in Madison.
Three others with the potential to breakthrough: