Josh Wilson returned to the field Wednesday after sustaining a concussion in the third quarter of Sundays loss in St. Louis.Wilson was cleared for contact, Coach Mike Shanahan said, but he was limited in practice. As such, his status for this weeks game against Cincinnati remains unclear.Im going to do what I can, he said.Wilson was injured during a helmet-to-helmet blow while knocking Rams running back Daryl Richardson out of bounds.I was coming right for him and he ducked his head at the same time I ducked mine, Wilson said. It was a bang-bang play. Its an unfortunate thing.With Brian Orakpo and Adam Carriker sidelined and Brandon Meriweather questionable, Wilson could give the Redskins reeling defense a significant boost against Pro Bowlers Andy Dalton and A.J. Green. But Wilson also he doesnt plan to return before hes ready.Its something serious, anytime youre talking about your brain, he added. Its not just the long term effect, its the short term effect being able to do what I need to do on the field. Im just making sure Im doing the best thing for the team.