• Even before BYU’s Hail Mary triumph, Nebraska gave new coach Mike Riley causes for concern. The Huskers committed 12 penalties, and their top three tailbacks — Terrell Newby, Imani Cross and Mikale Wilbon — combined to average just 3.95 yards per carry. But BYU ranked 14th nationally in that category last year, allowing 3.28 yards per carry, and has seven starters back on defense. It’ll be interesting to see how much Riley’s team improves against South Alabama and Miami.

• Wisconsin’s Joel Stave threw tight spirals and completed 66.7 percent of his passes (26-for-39) against Alabama. But the Crimson Tide exposed the Badgers’ inexperienced offensive line, which includes two veterans — Tyler Marz and Dan Volz — and three question marks. Alabama’s front four could expose lots of teams, but O-line depth, usually a Badgers strength, has turned into a very real concern.

• The Big Ten’s respect level took more hits in Week 1 with Penn State’s loss to Temple and with Indiana barely holding off Southern Illinois, 48-47. Five games this week will continue to shape this story line, good or bad: Oregon at Michigan State, Oregon State at Michigan, Iowa at Iowa State, Washington State at Rutgers and Minnesota at Colorado State.