The San Francisco 49ers want every single one of their fans to wear a mask until the coronavirus pandemic subsides, and they're willing to troll opposing fans into oblivion if they refuse to mask up. The 49ers showed everyone how to "grab a face mask," posting a highlight of New Orleans Saints safety Marcus Williams grabbing George Kittle's face mask during San Francisco's 48-46 barnburner of a win in New Orleans last season. Be a saint. Grab a face mask. #YourActionsSaveLives |.