The Redskins have significant question marks at multiple positions, notably quarterback, right tackle, guard, cornerback, receiver, inside linebacker . . . OK, basically every position other than tight end.

At running back, the Redskins have promise, but plenty of questions as well.

The elder statesman of the bunch is Ryan Torain, who is entering just his third season and in 10 games last season rushed for 742 yards and four touchdowns, and notched 125 receiving yards and two touchdown catches.

Torain certainly has the ability to be a No. 1 back, but the knock against him in two NFL seasons is that he can’t stay healthy. He was limited to two games as a rookie in 2008, missed all of 2009 because of an injury, and then last season was sidelined for four games because of a slow-healing hamstring injury.

Second-year back Keiland Williams played more of a third-down back role last year and improved in pass protection as the season progressed. He was pressed into being the feature back twice (because Torain and Clinton Portis were hurt). Against Philadelphia, Williams tallied 89 rushing yards, 50 receiving yards and three touchdowns. Against Tennessee, Williams had 68 rushing yards and 27 receiving yards.

That is the extent of the significant experience in the Redskins’ backfield. Chad Simpson was hurt for much of the year, and had played primarily as a special teams player in his two previous seasons. James Davis and Andre Brown have hardly played.

Washington drafted Nebraska speedster Roy Helu and Penn State workhorse Evan Royster, and Shanahan said both could challenge for the starting job.

But is that enough? Or should the look to add another veteran to the mix?