Ohio State moved into second in the College Football Playoff rankings behind Alabama, with Michigan and Clemson still in the top four after losing for the first time this season.

Louisville was fifth and Washington dropped from fourth to sixth after its first loss.

Clemson, Michigan and Washington – the Nos. 2, 3 and 4 teams in last week’s rankings – all lost to unranked teams Saturday. Michigan, which has three victories against teams in the selection committee’s top 10, didn’t move after losing to Iowa. Clemson dropped two spots to No. 4 after losing to Pittsburgh.

Louisville was fifth, Wisconsin was seventh and Penn State eighth, giving the Big Ten four teams in the top 10. Oklahoma was the highest-rated Big 12 team at nine. Colorado was 10th.

Michigan’s loss to Iowa created a potential predicament for the selection committee with the Buckeyes. Because Ohio State lost at eighth-ranked Penn State, the Nittany Lions would win a tiebreaker for the Big Ten East if both finish 8-1 in the conference, shutting out the Buckeyes from the conference championship game.

In two years of the playoff, all the participants have been conference champions and the committee is instructed to give some preference to league champs and head-to-head results when teams are similar.

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There is little question that Ohio State would have the best overall resume in the Big Ten and maybe one of the best in the country if it wins out. But would not winning the conference keep the Buckeyes out the way it did last season?

A Penn State loss in the next couple of weeks would clear things up, but the Nittany Lions play Rutgers on Saturday and finish at home against Michigan State. They will be heavy favorites in both games.

A possible solution for the Buckeyes and the selection committee: If Oklahoma wins the Big 12 and Wisconsin wins the Big Ten, the Buckeyes would have a victory over both. Problem solved.

Louisville’s hurdle could be even more difficult. Without a Clemson loss at Wake Forest on Saturday, Louisville can’t get to the ACC championship game because of its loss to the Tigers in early October.

Unlike the Buckeyes, who could have wins over Oklahoma, Wisconsin and Michigan, Louisville will put forth a resume that would include one marquee victory: a demolition of Florida State in September.