Big Ten Power Rankings Week 13: Nebraska Slips, Northwestern Rises

Nov 22, 2014; West Lafayette, IN, USA;Northwestern Wildcats quarterback Zack Oliver (10) passes the football with protection from offensive lineman Matt Frazier (57) and offensive lineman Paul Jorgensen (78) in the 2nd half against the Purdue Boilermakers at Ross Ade Stadium. Northwestern won the game 38-14.Mandatory Credit: Sandra Dukes-USA TODAY Sports