Report: Washington Redskins QB Robert Griffin III may have tore ACL, LCL - NFL News | FOX Sports on MSN: "The Redskins quarterback might have to undergo exploratory surgery to determine the extent of the damage to his knee and whether the injuries are new, according to the Post.
Griffin tore his ACL while playing for Baylor in 2009, and Shanahan said that old injury caused Griffin's latest MRI to prove inconclusive and produce ''differences of opinion'' in those who have looked at it.
''They want to take another look and have a physical exam with him,'' Shanahan said, ''to make sure they're not looking at old injuries.''
A torn ACL typically requires a rehabilitation period of nine to 12 months, although some players don't return to full health until their second season after the injury. On the other hand, one of this season's most remarkable stories was Adrian Peterson, who returned about eight months after tearing an ACL and nearly broke the NFL's single-season rushing record."
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