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Robert Griffin III has knee sprain but no ACL tear, Redskins say

LANDOVER, Md. The Washington Redskins say Robert Griffin III doesn't have a major knee injury.

Team spokesman Tony Wyllie said Sunday that Griffin underwent an MRI and has a sprained right knee but that "everything is clear" in terms of significant ligament damage.

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Wyllie specifically ruled out a season-ending torn ACL.

Wyllie said coach Mike Shanahan will update the rookie quarterback's condition Monday.

Griffin was injured in the final minutes of regulation in the Redskins' 31-28 overtime win over the Baltimore Ravens.

As CBSSports.com Ryan Wilson notes, Ravens defensive lineman Haloti Ngata -- all 340 pounds of him -- caught Griffin flush with a big hit. The force of the collision caused the quarterback's right leg to whip violently as he went to the ground. (Watch the hit here).