Who will back up Clinton Portis?

[Shane]

I would rest Portis at least 10% of the time, and as much as 20% if the drop off isn't too steep, because we want him to have maximum strength during the playoffs, and maintain his health for the times during games we most need him. This will keep him all the fresher, and when and if McCullough can come in there, he will be very well rested and on full turbo.