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One week ago, it seemed that we knew for sure who the top teams were in the NFL, and likewise we knew who the bottom-feeders were. Oh, how things change.

Week 7 of the NFL season brought big upsets, big injuries and big changes to our weekly power rankings. Losses by the Chicago Bears, Detroit Lions and Miami Dolphins mean we'll see major movement in the top 15. On the other hand, wins by the Washington Redskins, Atlanta Falcons and Carolina Panthers means we're seeing teams in the bottom 10 make a move up.

What's perhaps most surprising is that there are still three winless teams heading into Monday night. The Giants have a chance to cut that number to two, but you should be able to take a good guess at which teams make up the bottom of the rankings.