Amerson was signed by the Raiders on Tuesday, NFL.com's Ian Rapoport reports.

A second-round pick in the 2013 NFL Draft, Amerson was recently released by the Redskins, after struggling badly through the first 33 games of his career. He's mostly drawn attention for his poor coverage, but the Raiders are so thin at cornerback that Amerson might eventually work his way into a significant role.

Amerson left Monday's practice due to a left shoulder injury, the Washington Post reports.

While attempting to cover DeSean Jackson on a deep route down the left sideline, Amerson broke up the pass but landed on the shoulder. Instead of allowing Amerson to continue, head coach Jay Gruden and a trainer directed the cornerback to leave the field for further evaluation. Until the results are released, Amerson's immediate availability will remain up in the air.

Amerson was inactive Sunday due to breaking a team rule, the Washington Post reports.

Amerson should regain his starting job once he's out of the doghouse.

Amerson (concussion) is active for Sunday's game against the Titans.

Amerson is only a fantasy option in very deep IDP leagues, but his presence will be a boost for the Washington pass defense, which will be without Tracy Porter (hamstring) this week.

Amerson (concussion) was a full participant in practice Friday and is listed as questionable for Sunday's game against Tennessee, Zac Boyer of the Washington Times reports.

Amerson said after practice that he has passed through the concussion protocol and has been cleared to play, so chances are good that he'll be available Sunday.

Amerson (concussion) was limited in Wednesday's practice, the Washington Post reports.

Amerson still has to pass the league's concussion protocol before he's allowed to play.

Amerson (concussion) will be evaluated throughout the week with the hope of being ready Sunday, the Washington Post reports.

Amerson will go through the league's concussion protocol and must pass before returning to the field.

Amerson suffered a concussion during Sunday's game in Arizona and will not return, NFL.com reports.

Amerson will finish Sunday's game with two solo tackles, including one for loss. With him out, the Redskins are left in a dire situation at cornerback, as E.J. Biggers and Chase Minnifield represent their only active players remaining at the position, other than fellow starter Bashaud Breeland.

According to NFL Network's Albert Breer, Redskins coaches have seen in second-year CB David Amerson a "facsimile of Aqib Talib."

In layman's terms, they believe Amerson is an exact copy of Talib. The Redskins are banking on a big sophomore leap from Amerson to help turn around a secondary that was shredded by quarterbacks last season. Amerson stands in at 6-foot-1 and 205 pounds and has outstanding ball skills. He picked off 13 passes as a sophomore at NC State. Amerson is penned in as the stater opposite DeAngelo Hall. The Redskins' real concerns are at the safety spots.

The Redskins still plan to start David Amerson across from DeAngelo Hall this season.

The Skins meekly tried to upgrade their secondary in free agency, but whiffed on all their targets other than oft-burned nickel corner Tracy Porter. It leaves Amerson, last year's second-round pick, with a ton on his shoulders. Jay Gruden has said the coaches believe the rangy prospect is "ready." Until he proves it, this unit will be one to attack from a fantasy matchup perspective.

Redskins CB David Amerson is expected to get a chance to start in 2014.

Amerson, the 51st selection in last April's draft, served as the Redskins No. 3 corner behind DeAngelo Hall and Josh Wilson as a rookie. Both Wilson and Hall are set to become free agents. There will likely be mutual interest between Hall and the Redskins regarding a new deal, but Wilson struggled and will probably be elsewhere. Amerson (6-foot-1, 205) has the ideal length to play outside. Washington will also be eyeing corners in free agency and the draft.

Redskins CB David Amerson (concussion) is expected to be cleared for Week 7.

"He passed his tests," coach Mike Shanahan said Thursday. "He'll be tested every day and go through the protocol, and if he passes his tests each day, he should be ready to go." A second-round pick, Amerson has made two starts this season, playing 245 snaps.

Redskins CB David Amerson left Sunday night's Week 6 game against the Cowboys with a concussion.

Amerson suffered a helmet to helmet hit on a kickoff return in the third quarter and is out for the game. He'll now need to pass the league's concussion protocol before returning to practice.

Second-round pick David Amerson has received more first-team reps than any cornerback in Redskins camp.

Per the Washington Post, coaches and veteran players have both described Amerson as "the most talented corner on the team." Amerson obviously doesn't lack talent, but he's still prone to peeking into the backfield, a problem that plagued him throughout last season at North Carolina State. In an ideal world, the Redskins will fix that issue and use Amerson at outside corner in all nickel packages, opposite Josh Wilson with DeAngelo Hall in the slot.