Seattle Seahawks defensive end Cliff Avril is a major doubt to return to tonight's Super Bowl, according to reports.
Avril was forced off with concussion during tonight's game with New England Patriots, and CBS Sports reporter Jason La Canfora isn't convinced that he will return.
He tweeted: "Cliff Avril is questionable to return for Seattle. He is being evaluated for a concussion".
The Seahawks and the Patriots were level at 14-14 at half time.