NFL: 4 Undefeated Teams That Won't Last Through Week 3

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"Parity" is a word that can be associated with the NFL more than any other sports league. Statistics say half the playoff teams from last year will fail to qualify in 2011.

Many teams who were thought to be have-nots are without a loss through Week 2. This happened for multiple reasons, one being the fact they faced bad teams.

But the early glory is over for some of these undefeated teams, and their fans will not be pleased with this week's outcomes.

Detroit Lions

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Matthew Stafford has looked great in the first two games, but the Lions will need some sort of ground attack on the road at Minnesota to come out with a win. The Vikings actually shut down Vincent Jackson and Mike Williams in the first two weeks, so Calvin Johnson can't be the only man Detroit turns to.

Adrian Peterson is going to run furiously, and Detroit isn't the best at shutting opposing rushing attacks down. Look for Jared Allen to get by Lions LT Jeff Backus on the fast turf that of the Metrodome.

Donovan McNabb has played poorly in his first two games for Minnesota, but what better secondary is there to face? Expect the Vikings to shorten the game and keep the clock running with Peterson getting around 25 carries.

New York Jets

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Picking the Raiders over the Jets in Week 3 will be unpopular because of how each team finished Week 2. However, Oakland has run the ball extremely well, albeit against two of the bottom five rushing defenses in 2010.

Mark Sanchez isn't a consistent quarterback yet, but he has traveled to Oakland and left with a win before.

Jason Campbell isn't great, but the Raiders have different receivers popping up each week like Denarius Moore against Buffalo. Darrelle Revis locking down his man is a given, but no one knows who'll be the Raiders' top receiver week-to-week.

This offensive line for the Jets has been altered, and the Raiders defensive front is getting better with players like Matt Shaughnessy and Lamarr Houston.

Look for the Jets' running game to shut down on Brian Schottenheimer, while Oakland's safeties make big plays to help get a win.

Buffalo Bills

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New England travels to Buffalo in Week 3, with Tom Brady on a record pace for passing yards in a season. Brady's performances won't continue at this rate, but he'll still manage to be precise.

The Bills like to run the ball, despite Ryan Fitzpatrick playing well in the early going. Fred Jackson refuses to give his starting job over to the young C.J. Spiller, as Jackson is the leading rusher in the NFL through two games.

The issue for Buffalo is New England has plenty of beef in the middle of their defensive line, especially with new acquisitions. Bill Belichick's defense still has serious issues getting off the field on third down just like last season, but Buffalo's offensive line can make decent pass rushing appear much better than it actually is.

An upset could happen because Buffalo will win two or three division games, but it's hard to envision the Bills winning this game.

Houston Texans

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Houston's high-powered attack travels to the Superdome to take on the Saints and a loud croud that makes things hard on opposing offenses. Arian Foster's absence isn't going to slow down the Texans with Ben Tate playing as well as he is, being a top five rusher through Week 2.

Gregg Williams will apply pressure that Matt Schaub didn't see from the Colts or Dolphins. Andre Johnson is better than any corner the Saints' defense can throw at him, but the pass rushers will prevent Schaub from throwing to him.

Mario Williams has been good in the 3-4 so far, but New Orleans will test the front 3 by running the ball directly at rookie J.J. Watt with Pro Bowl guards Carl Nicks and Jahri Evans. The secondary for Houston better not bite on play action, because Drew Brees still has Robert Meachem and Devery Henderson to stretch the field with.

The Texans know about letdowns, but this game will not be because of another one from Gary Kubiak and his team. It's still hard to imagine them topping New Orleans on the road, though.