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Minnesota Vikings (17th)
The Vikings have underachieved as an overall team defense, but they get the Chiefs in Week 4.
The Vikings have stuffed the run by only allowing 67.3 rushing yards per game; fourth best in the league. They have struggled against the pass, though, allowing 299.3 passing yards per game; 29th worst.
Luckily for the Vikings, the Chiefs are a good running team that struggles passing the ball. Not only that, but the Chiefs are without their best runner in Jamaal Charles.
The Chiefs have only scored 27 points on the season, and Jared Allen will lead a hungry Vikings team searching for their first victory.
Buffalo Bills (19th)
Did anyone see what the Bills were able to do to Tom Brady last week? Yes, the Bills did allow 31 points to the Patriots, but they were able to intercept Tom Brady four times.
The Bills are ranked 19th, but with an easy matchup against the Bengals on the road, they could easily creep into the Top 10.
Expect the Bills to take full advantage of rookie Andy Dalton, as the 49ers did in Week 3.
Cleveland Browns (25th)
The Browns are the biggest sleeper among defenses as they come in ranked 25th. After three straight easy matchups to start out the season, the Browns get the Kenny Britt-less Titans.
Teams have been able to run against the Browns as they have allowed 128.7 rushing yards per game; 29th worst.
With Kenny Britt out for this game, it would be wise for the Browns to stack the box and force Matt Hasselbeck to beat them.
The Browns have not allowed more than 20 points all season, and I expect more of the same from Cleveland in Week 4 at home.