For those thinking that Oklahoma's loss to Iowa State would cause problems for Ohio State in the rankings... well... that isn't happening yet. In fact, the opposite is happening.
Ohio State's lone loss on the season was to Oklahoma, who had the aforementioned loss on Saturday despite being 31-point favorites. Ohio State was No. 2 going into Week 6 — perhaps inexplicably ahead of Clemson, Penn State, and Georgia — and that didn't change after Saturday's results. In fact, Ohio State actually closed their lead on Alabama in the FPI, and are now only 1.3 points back of the No. 1 spot.
Last week, Ohio State was 3.6 points behind Alabama, but it looks like the Crimson Tide's eight-point win at Texas A&M had a much larger effect on ESPN's FPI rankings that Oklahoma dropping to Iowa State did.
Oklahoma fell from No. 3 to No. 6 in the FPI after the loss. They still rank ahead of undefeateds Georgia, Wiscosnin, and TCU.