Broncos HC John Fox wants the Broncos to run the ball far better than in the past two seasons, when they finished 18th and 26th in the league under coach Josh McDaniels.
A better running game means finding another back to at least complement Know-shon Moreno, who also hasn't reached the production expected of the No. 12 pick in the 2009 draft.
"In my opinion, you need more than one guy to make a full commitment to running the ball," Fox said. "We'll be in the process of finding more than one guy."