COLUMBUS, Ohio (WCMH) — For the first time this season, Ohio State's No. 1 ranking is under threat, and it's coming from two different angles.

The Buckeyes are facing a ranked opponent for the first time since Week 1 as they travel Saturday to No. 17 Illinois. On the other side of the country, a top-10 Big Ten game could also see Ohio State's standing as the nation's best team under threat.

Aside from Ohio State's standing atop the bracket, the College Football Playoff outlook changed significantly, with the top two teams this preseason dropping out entirely and a new team making its debut. Here is a look at the changes to the projected 12-team playoff field in the past week, plus what to watch for this weekend.

Bye-bye, Penn State and Texas

That's right. The two teams that started the

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