Matt Forte is the No. 1 back in Chicago, but Michael Bush's emergence could relegate Forte to the sideline when the team is at the goal line.
Neither quarterback has looked great this preseason, but John Skelton might have the early edge on Kevin Kolb to be Arizona's starter.
Jahvid Best and Mikel Leshoure are battling to start at running back in Detroit, but the job might come down to who can stay healthy.
Matt Forte could be relegated to watching from the sidelines for the next month as he suffered a knee injury Sunday.
After a big game Sunday, Roy Helu looks to have taken over the starting job for the Redskins, though that's never a lock in Washington.
Mike Shanahan's confounding use of his running backs might make him the Tony La Russa of the NFL - and not in a good way.