FANTASY PLAYS: Replacing Roethlisberger, grabbing Ajayi

It's not often a running back coming off a 204-yard rushing day is on the fantasy football waiver wire. Buy Jay Ajayi of the Dolphins is still available in many leagues after surprising with a big day against the Steelers. Ben Roethlisberger was the biggest injury of the week, but there are enough quarterback options in most leagues to fill in.