The Pittsburgh Steelers suffered what could be a serious blow to their offensive line as rookie guard David DeCastro had to be carted off the field with a knee injury against the Buffalo Bills on Saturday night.

DeCastro, according to NFL.com, suffered damage to his ACL and MCL and will be out for a while, though the report did not specify immediately whether or not the injury was season-ending.

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Terry McCormick covers the Titans for TitanInsider.com