San Francisco 49ers linebacker Dre Greenlaw suspended one game for head-butting incident

San Francisco 49ers linebacker Dre Greenlaw has been suspended for one game by the NFL after head-butting Seattle's Ernest Jones IV following a late hit during Sunday's 32-29 win against the Seahawks. The league cited the action as 'contrary to the generally understood principles of sportsmanship'. Greenlaw is expected to appeal the suspension.