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Patriots top NFL's most stable franchises

This week, our season preview will look at the key characteristics of championship contenders. What sets them apart? We'll examine five key issues -- efficiency, stability, chemistry, strategy and talent.

We polled a number of our experts at ESPN.com (Len Pasquarelli, John Clayton, Michael Smith, Jeremy Green and Steve Muench of Scouts Inc.) to come up with our top 10 for each category.

Tuesday we are looking at stability. Teams that keep their coaching staffs and key players together for a long time, running the same schemes and establishing continuity, have a distinct advantage in the NFL.

Here's how we ranked the top 10: