Just when you thought you had a handle on what to expect in the 2017 college football season, the unexpected happened once again.
Ohio State derailed Penn State's National Championship aspirations with a rally for the ages.
Iowa State continued its knack for stunning upsets, doubling up previously No. 4-ranked TCU.
Those two results opened the door for Notre Dame — which dominated No. 14 NC State — and Wisconsin — which continues to roll through the season unblemished against a relatively soft schedule — to crack the top 4.