Posted by ESPN.com's Adam Rittenberg
Ohio State is back where it belongs, in the top 10 of the national rankings, while Iowa returned to the AP Poll after its big win at Penn State.
The Buckeyes moved up four spots to No. 9 after posting their second consecutive shutout Saturday against Illinois. It still makes no sense to see Ohio State behind Oklahoma, which didn't play Saturday, but at least this time, Ohio State wasn't punished for winning convincingly.
As for Iowa, what did I tell you, Hawkeyes fans? You complained all last week about not being ranked. Well, your team beat Penn State on the road and got rewarded with a No. 13 ranking. Iowa has the best chance to climb in the polls because of its road schedule, which includes a Nov. 14 trip to Columbus.
Penn State plunged 10 spots in the poll after its loss to Iowa, while Michigan moved up a spot to No. 23 after its scare against Indiana.
Wisconsin is seventh in receiving votes after improving to 4-0. It's a bit surprising that Minnesota received no votes.