Nnamdi Asomugha has signed with the Philadelphia Eagles and the entire landscape of the league could change.
A lock down corner like Asomugha can turn a solid defense into an elite defense and an elite defense into an all time great defense.
The NFL currently has a wealth of quality defensive backs and most teams have quality players at the position.
This article will cover the best defensive backs in football and will go through each NFL teams best player at the position.
The Dallas Cowboys secondary has a few solid pieces and this choice could be argued.
Mike Jenkins could have made the list but I choose Terrence Newman.
Newman had five interceptions last year and while the Cowboys' pass defense was one of the worst in the league, he was one of the more consistent parts of it.
Antrel Rolle has really helped the New York Giants' secondary since he signed with them two years ago.
Rolle had only one interception and one forced fumble last season but his numbers don't tell the entire story of his impact.
Rolle a major part of the Giant defense and is a key role in their success or failures.
The Philadelphia Eagles have a few very quality corners, but Nnamdi Asomugha is without question the best defensive back on their roster.
Asomugha will change the Eagles defense and should help them turn into one of the best in the league.
If Nnamdi can play like he did in Oakland, the Eagles are in for a very good season.
The Washington Redskins secondary was easily one of the worst in the league last season and are lacking a lot of talent in their unit.
DeAngelo Hall had six interceptions last season, including three in one game against the Chicago Bears.
Any guy with the ability to intercept three balls in one game has talent, even if the picks are off Jay Cutler.
Adrian Wilson is the glue that holds the Arizona Cardinals defense together.
He is not only the best defensive back on the team but one of the best players on defense and plays a huge role for the Cardinals.
Wilson had two picks and two sacks last season, to go along with 88 tackles.
With the loss of Nate Clements, the San Francisco 49ers have some work to do in rebuilding their secondary.
With that said, Shawntae Spencer is a solid corner and had a pretty good season in 2010, intercepting three passes and forcing three fumbles.
Spencer will have to step his game up as the number one corner next season but should be able to.
The young Earl Thomas has had a great start to his career in Seattle.
In his rookie year, Thomas had five picks and one forced fumble and showed he will be a great safety for years to come.
Marcus Trufant is also worthy of consideration but I gave the edge to Thomas because he is the future of the team's defense.
Craig Dahl had a very nice season in 2010, recording almost 100 tackles to go with two interceptions and one forced fumble.
Dahl made this list because of the St. Louis Rams losing Oshiomogho Atogwe to the Washington Redskins in free agency.
Dahl is still a relatively young player with room for improvement and he should only get better.
Charles Tillman has been the Chicago Bears' best defensive back for a long time now and it looks like he will continue to be that going forward.
Tillman is a fumble forcing machine and has forced 25 fumbles in a 114 game career, including 17 since 2007.
Tillman would also make a great safety but since the Bears are lacking in corner talent, don't expect a move any time soon.
Chris Houston is the best defensive back for a pretty bad Detroit Lions secondary unit.
Fortunately for them, Ndamukong Suh will be demolishing offensive linemen and knocking off the quarterbacks timing and pocket presence.
Houston had one pick and one forced fumble last year to go along with 56 tackles.
Charles Woodson is the best overall corner in the NFL and the best player on a Super Bowl winning defense.
Woodson can do it all, stop the run, press cover, sack the quarterback and has been huge for the Packers.
Woodson had two sacks, five forced fumbles and two interceptions in 2010 and should produce close to the same numbers next season.
The Minnesota Vikings are in dire need of secondary help and will need to address that area before contending for a Super Bowl again.
Antoine Winfield is currently their best defensive back and is aging more and more every season.
Winfield had two forced fumbles and two picks last season but is 34 years old and the Vikings will need a replacement for him in the next few seasons.
The Atlanta Falcons gave up 48 points to the Green Bay Packers in the playoffs last season and need to improve their secondary ASAP.
Brent Grimes, their best defensive back, is a good player and gives the Falcons something to build their unit around.
Grimes had five interceptions last year and is a decent cover corner.
Charles Godfrey had a very good season in 2010.
Godfrey had five interceptions and one forced fumble and has a lot of room to improve.
Currently in his fourth year out of Iowa, Godfrey is part of a young Carolina Panthers defense that could turn into something nice under new, defensive minded, head coach Ron Rivera.
Godfrey is the future of the Panthers secondary and should make a few Pro Bowls later in his career.
Roman Harper has taken over Daren Sharper's role as the New Orleans Saints game-changing safety.
Harper had six forced fumbles and one interception last season along with three sacks.
Harper is a good NFL safety and a big part of the Saints defense.
While Aqib Taleb may soon be cut by the Tampa Bay Buccaneers, he is still currently on their roster and easily their best defensive back.
Taleb is a difference making, shut down corner back and could be one of the best in the league with a few more years of development.
Taleb had six interceptions last season and has a very bright future ahead of him, where ever he ends up finishing his career.
Jarious Byrd exploded onto the NFL scene in his rookie year when he finished with 9 interceptions.
Byrd didn't even come close to the same interception numbers in his second season, finishing with one, but is still Buffalo's best defensive back.
Byrd upped his tackle total and sack total in his second year and should have a bounce back year in interceptions in 2011.
In his second season out of Illinois, Vontae Davis put up solid numbers recording 54 tackles, 2 forced fumbles, and one interception.
Davis has real potential to be a quality corner in the NFL and with some work he can get to that level of player.
Devin McCourty had a huge rookie season last year and showed us dominance that rookie corners rarely show.
McCourty had seven interceptions and two forced fumbles and played shut down defense against some quality wide receivers.
It looks like McCourty will be one of the top tier corner backs in the NFL someday down the road, if he isn't their all ready.
Best shut down corner in the league on one of the best defenses in the league.
Champ Bailey is slowly getting up there in age but his game doesn't seem to be slowing down much at all.
Bailey has lost some speed and the ability to lock down some of the better receivers in the game but still has the talent to slow them.
Bailey is stuck on a bad Denver Broncos defense and hopefully will compete for a Super Bowl by the end of his career.
Eric Berry had a great rookie season in 2010 and was a huge part of the Kansas City Chiefs shocking us all and winning the AFC West.
Berry had four interceptions and one forced fumble to go along with 92 tackles and two sacks.
Berry, along with Earl Thomas and Devin McCourty are part of a great young crop of defensive back talent that has just entered the NFL and will only get better with age.
From Nnamdi Asomugha to Michael Huff...what a drop off.
The Oakland Raiders go from having one of the best defensive backs in the league to lacking a lot of talent at the position and needing to restock.
Michael Huff is a solid player, though, and recorded three forced fumbles, three interceptions and four sacks in 2010.
That was, however, with Nnamdi Asomugha playing on the opposite side of him, allowing him to cover number two receivers and getting a lot of balls thrown his way.
Huff will have to improve his play this season as he becomes the number one corner on the Raiders in order for their defense to have the same kind of success it has the past few seasons.
Eric Weddle resigned with the San Diego Chargers this Offseason after many thought he would leave town.
Weddle had 96 tackles and two interceptions last year for the Chargers and plays a big part on their defense.
The Chargers were wise in keeping him in the blue and white and should continue to build their defense around players like him.
Ed Reed is a threat to intercept the ball on every time he is on the field and is the definition of a "ball hawk".
Reed had eight interceptions last year, which led all of the NFL, and makes an impact on defense that only a few players can make.
Reed is a huge reason why the Baltimore Ravens defense dominates from year to year and will help them compete for the Super Bowl in 2011.
The Cincinnati Bengals lost corner back Johnathan Joseph to the Houston Texans in free agency and signed Nate Clements to fill the hole.
Clements is getting up their in age but is still a quality corner that has football left in him.
In 2010, Clements intercepted three passes and forced three fumbles.
Clements' veteran leadership should help out a young Bengals defense and it was a good move by Cincinnati to sign him.
Joe Haden had a great rookie season on 2010, intercepting six passes and forcing one fumble.
Haden looks like he will be a top tier corner for many years in the NFL, along with Devin McCourty and the two of them are the future of the position.
Haden has a ton of room for improvement which should be a scary thing for the rest of the league and the AFC North.
Troy Polamalu is the best all around safety in the game and could very well be the best defensive player in football.
Like Charles Woodson of the Green Bay Packers, Polamalu can play in the secondary and in the box and stop the run along with intercepting passes.
Polamalu had seven interceptions last season, tied for second in the leauge, and also recorded 63 tackles, all of that in only 14 games.
After missing out on Nnamdi Asomugha, the Houston Texans signed Johnathan Joseph to fill their giant holes at corner back.
Joseph is a quality corner with good skills and put up good numbers last season in Cincinnati.
Joseph had three interceptions and 42 tackles and should help the Texans defense in 2011.
Antoine Bethea has been one of the more consistent players on the Indianapolis Colts' defense the past few years which makes him their best defensive back.
Bethea recorded 106 tackles, intercepted one pass and forced on fumble in 2010 and played a huge role on a Colts' defense that could have been better.
The Colts seem to have been trying to build their defense into something grand for the past few seasons now and Bethea will help them do that.
Cortland Finnegan is a great shut down corner who gets under his opponents skin as well as anyone.
Finnegan is an annoying loud mouth that most fans, outside of Tennessee, strongly dislike but even still, no one can deny his ability to lock down one side of the field.
Finnegan had 100 tackles, very high for a corner back, two interceptions, one sack and one forced fumble.
Finnegan is an overall great defensive back and one of the best defenders on the Titans defense.
Rashean Mathis has been a leader on defense for the Jacksonville Jaguars for a long time.
Mathis had a solid 2010 campaign, intercepting one pass, forcing one fumble and playing a good number one corner for the Jags.
Mathis is getting older now and while his production may drop slowly, he is still a quality player and the best defensive back on the Jacksonville Jaguars.