The NFL can flag Clay Matthews, but it can't take the danger out of football - The Washington Post
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Packers: Appleton native goes viral mocking Clay Matthews penalty
Watch: Clay Matthews flagged again during sack, calls league 'soft'
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Clay Matthews rips the 'terrible' roughing penalty that allowed the Vikings to tie the Packers
Miami Dolphins DE William Hayes tears ACL trying to avoid roughing-the-passer penalty on sack – Sun Sentinel
NFL Releases Statement On This Absurd Clay Matthews Penalty - The Spun: What's Trending In The Sports World Today
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Jermichael Finley - My thoughts exactly @nfl #Repost @packersglobal with @get_repost ・・・, #ClayMadeThePlay
What's a Sack? Clay Matthews Accuses NFL of 'Going Soft' over Roughing the Passer Penalty
Clay Matthews on latest roughing-the-passer call: NFL is 'getting soft' - The Boston Globe