Williamson cleared

Wide receiver Troy Williamson, who hasn't played since suffering a concussion against the New York Giants three weeks ago, was cleared to return to practice during a Tuesday visit to the Mayo Clinic.

"They said that they essentially couldn't find anything to hang their hat on," coach Brad Childress said. "No abnormalities. They think that he can handle some of that stuff with Tylenol."

Williamson had been suffering from headaches since being injured and has been inactive for the last two games.

Guard Artis Hicks continues to be bothered by a back injury and is not expected to practice until later in the week, according to Childress, who said cornerback Charles Gordon (quad) would be limited.

Notes: Hicks and safety Tank Williams (knee) were the only players not participating at the start of practice.

Defensive tackle Fred Evans returned to practice after serving a two-game suspension for violating the NFL's personal conduct policy.

Wide receiver Justin Surrency, who was with the Vikings during training camp and the preseason, was signed to the practice squad. He replaces defensive tackle Conrad Bolston, who was claimed on waivers by Green Bay.