College Football Week 4: 5 teams on upset alert

Sep 17, 2016; Auburn, AL, USA; Texas A&M Aggies quarterback Trevor Knight (8) looks to pass during warm-ups prior to the game against the Auburn Tigers at Jordan Hare Stadium. Mandatory Credit: Shanna Lockwood-USA TODAY Sports
Sep 17, 2016; Auburn, AL, USA; Texas A&M Aggies quarterback Trevor Knight (8) looks to pass during warm-ups prior to the game against the Auburn Tigers at Jordan Hare Stadium. Mandatory Credit: Shanna Lockwood-USA TODAY Sports /
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Sep 17, 2016; Lincoln, NE, USA; Nebraska Cornhuskers wide receiver Jordan Westerkamp (1) scores a touchdown against Oregon Ducks cornerback Ugo Amadi (14) in the first quarter at Memorial Stadium. Mandatory Credit: Bruce Thorson-USA TODAY Sports
Sep 17, 2016; Lincoln, NE, USA; Nebraska Cornhuskers wide receiver Jordan Westerkamp (1) scores a touchdown against Oregon Ducks cornerback Ugo Amadi (14) in the first quarter at Memorial Stadium. Mandatory Credit: Bruce Thorson-USA TODAY Sports /

Nebraska is riding high right now. The Cornhuskers are coming off their biggest win of the season over No. 22 Oregon and are now firmly supplanted in the AP Poll at No. 20. Last year, Nebraska couldn’t even sniff the Top 25 thanks to six one-score losses, including a Hail Mary defeat to open the season at home against BYU.

This team may have turned a corner and figured out a way to win the close ones. Beating the Ducks by three after a game-winning touchdown run by Tommy Armstrong with just over two minutes left is a good start.

Next on the schedule is a 1-2 Northwestern team that might not look like much of a threat thanks to losses against Western Michigan and Illinois State to start the year, but you can’t let that early-season trouble fool you. Northwestern is always a pesky team under the lights at home in conference play.

Mike Riley and the Cornhuskers will be heading to Evanston this weekend for a 7:30 p.m. ET kickoff in front of thousands of raucous Wildcat fans. It might not be the most hostile environment in college football, but primetime games at home have produced a handful of upsets for Northwestern.

Could this defense key yet another one and put the Wildcats’ season back on track?