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Sources: Cowboys' Parsons, Lawrence dealing with sprains

FRISCO, Texas - When the Dallas Cowboys play the Pittsburgh Steelers on Oct. 6, they could be without their top two defensive linemen.

An MRI on Friday confirmed edge rusher Micah Parsons suffered a high left ankle sprain in the fourth quarter of the Cowboys' 20-15 win against the New York Giants on Thursday, while defensive end DeMarcus Lawrence suffered a right mid-foot sprain that will keep him out for multiple weeks, according to sources.

It's a major blow to a defense that struggled against the run defensively in losses to the New Orleans Saints and Baltimore Ravens but gave up just 26 yards on 24 carried against the Giants.