Redskins wideout DeSean Jackson suffers separated shoulder in practice

— -- RICHMOND, Va. -- Washington Redskins receiver DeSean Jackson suffered a Grade 2 separation of his right shoulder Thursday and is likely to be sidelined for a couple of weeks, according to sources.

Cornerback  DeAngelo Hall also left the joint practice against the Houston Texans early with a groin injury but it didn't appear to be serious. Hall is expected to be sidelined for a week, according to a source.

Jackson suffered an injury to his right shoulder at the end of a one-on-one drill; he had caught a pass and hit the ground and then slid into a sled. He lay on the ground for a couple of minutes before walking off on his own power, grimacing. But he remained on the sidelines with his right shoulder wrapped.

He was not made available after practice, though he appeared in good spirits, and coach Jay Gruden will not address the media until later this afternoon.

Hall tweaked his left groin and knee after slipping at the end of a play in which he was covering a Texans receiver.

Hall missed 15 games last season after tearing his left Achilles, but he said afterward that his Achilles was fine. Hall said he will be re-evaluated this afternoon.

He's the fourth Redskins corner to suffer some type of injury in camp. Bashaud Breeland will miss at least a month with a right knee injury; David Amerson is out with a sprained left shoulder; and Tevin Mitchel was waived Wednesday after suffering a season-ending torn labrum in his left shoulder.