Merry preseason, everyone. It’s been a long offseason, but football is finally gearing up again and to celebrate I’m rolling out a new series on TSR entitled “2010 NFL Question Marks,” where I discuss one or two of the biggest concerns that teams have heading into the new season. Granted, some teams have more issues than others, but I’ll primarily be focusing on the biggest problem areas. Today I’ll be discussing the trio of issues the Redskins could face this season.

I always thought Jason Campbell got kind of a bad rap, although there’s no question that Donovan McNabb has better physical tools – even at this point in his career. Thanks to first round pick Trent Williams and former Saint Jammal Brown, the tackle positions got a much needed makeover in our nation’s capital as well.

So generally speaking, the Washington Redskins are an improved football team.

But it seems as though some pundits are going a tad overboard when predicting this team’s success this year. While they have made several upgrades on that side of the ball, the offense still has plenty of question marks as well.

Let’s start with the offensive line. Williams is a tremendous prospect, but he’s still a rookie and far from a guarantee. He also doesn’t have a ton of experience on the left side, which is where he’s expected to anchor this Washington O-line.

Brown is a massive upgrade over Stephon Heyer, but that’s like saying an authentic slice of New York pizza is an upgrade over Dominos. Heyer was one of the worst offensive linemen in all of football last year, so a broomstick cemented in a bucket would have been an upgrade.

That said, Brown is more of a pass blocker than he is a mauler in the run game and the same could be said for Derrick Dockery, who will start at left guard. Both need to become better run blockers for this team to succeed over the course of the season.

Artis Hicks is versatile in that he can play a couple of spots on the O-line, but it remains to be seen if he can be effective as a full-time starter. At center, Casey Rabach is a seasoned veteran but at 32 he may be in store for a decline.

The fact that run blocking might be an issue compounds the concerns that the Skins could have in their backfield this year. Clinton Portis was only able to play in eight games last year and just returned to practice after dealing with an ankle injury. He hasn’t quite hit the dreaded age of 30 for running backs, but at 29 he appears to be in decline as well.

Larry Johnson, Ryan Torain and Willie Parker are currently listed behind Portis on the depth chart, but there have been reports recently that have stated that both LJ and “Fast Willie” could be cut before the season. And considering their lack of production last year, nobody could blame the Skins if they decided to give the younger back Torain a shot instead of keeping two aging veterans in Johnson and Parker.

The Skins have less of a concern at receiver, although seeing as how 38-year-old Joey Galloway is being tabbed the starter opposite Santana Moss, the team isn’t exactly set at that position either. Chances are Devin Thomas or Anthony Armstrong will push Galloway out of the starting role at some point, but even then the Skins don’t have a true No. 1 wideout on their roster.

I like the additions Washington made in the offseason, but this team isn’t going to go from 4-12 to a playoff contender overnight. Not with the questions that still surround the offensive line, running back and receiver positions.