COLUMBUS, Ohio (WCMH) -- Ohio State will spend the week resting and recovering before kicking off conference play next week. But as it rests, many other playoff contenders will play in season-defining games.

Week 4 will have three games between ranked teams, one of which is in the Big Ten and will be broadcast on NBC4. Each of these games will turn dark horses into serious playoff contenders. Here is a look at the major changes in the 12-team playoff projections and the key games to watch that could affect the playoff.

The roulette of top teams won't stop soon

The Associated Press poll voters shifted a whole bunch of the top 10 after a wild Week 3. NBC4 looks at the AP rankings until the initial official playoff rankings begin in November for playoff projections.

The only new team in t

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