Mostert Has Rushed Into a Starring Role

This past offseason, the 49ers’ potential running back stable of Matt Breida, Tevin Coleman and Jerick McKinnon was touted by some analysts as one of the best – if not the best – versatile and talented backfield trios in the NFL. But as the 49ers head into their final three regular-season games and a postseason berth, it’s Raheem Mostert who…