An embarrassing loss to the Bills. A serious injury to Tua Tagovailoa. Omar Kelly and Dave Hyde are looking for the panic button. Did GM Chris Grier's Dolphins rebuild go off the rails? How durable can Tua really be? And can backup QB Jacoby Brissett step up to lead Miami to wins? So many questions, so little time. The Dolphins take on the Raiders in Las Vegas Sunday at 4:05 p.m.