ST. LOUIS -- Rams Coach Jeff Fisher does not want the team's running backs to be judged solely on the preseason stats.
However, it doesn't mean he's not concerned about their production.
"That's an area where we need to improve on, but we haven't had opportunities in the games to really just line up," Fisher said after Monday's practice.
The Rams finish the preseason on Thursday against Baltimore.
The Rams are making a transition to a life without perennial 1,000-yard rusher Steven Jackson, who left via free agency to Atlanta.
They are averaging a little more than 3 yards a carry from their top four running backs, a year after the team ranked 19th in the league in yards per game with a 107.1 average.
Daryl Richardson, tabbed as the team's starter earlier this month, has 34 yards on nine carries in the first three games of the preseason.
"I feel pretty good about the running game," he said. "We've just got to execute and get better every day, all just be on the same page and eliminate penalties."
Richardson is coming off a rookie season in which he gained 475 yards on 98 carries in a backup role to Jackson.
Isaiah Pead's role might be more questionable. The second-year player out of Cincinnati carried the ball just 10 times in 2012 and is suspended for the 2013 season opener for violating the league's substance abuse policy.