Shanahan will implement a zone-blocking scheme that relies on offensive linemen capable of running and running backs capable of making that quick one cut for explosive runs. Shanahan was asked what type of running back best fits his scheme.

“People asking me that all the time … I like a good running back,” Shanahan said. “There’s no absolute. I’ve had big guys. I’ve had smaller guys. I’ll take any type of guy. I think Adrian Peterson, Marshawn Lynch are pretty good backs that are pretty big. That doesn’t mean I don’t want LeSean McCoy. So, I think any type of back can succeed in this system.

via Vaughn McClure of ESPN.com