The Redskins have talked with teams about trading quarterback Jason Campbell, but "nothing is imminent," general manager Bruce Allen said on Monday.

It's likely that the trade market for Campbell will develop as this Thursday's NFL Draft unfolds.

Once top draft prospects Sam Bradford, Jimmy Clausen, Colt McCoy and Tim Tebow are off the board, teams may look toward trading a draft pick for Campbell.

"It's hard to predict," Allen said. "You would think--common sense--that might happen. There have been conversations with people who are interested. Jason is a known commodity and a proven player in this league."

Campbell, who completed his fifth season in Washington and third as a full-time starter, was granted permission to seek a trade following the Redskins' acquisition of Donovan McNabb on April 4.

He did not attend last weekend's mini-camp at Redskins Park.

Head coach Mike Shanahan has said that the team still would welcome Campbell back to the team, but it would likely be in a backup role.

Meantime, the Redskins continue to evaluate quarterbacks available in the NFL Draft.

The team has hosted visits with QB prospects Bradford, Clausen, McCoy and Tebow, among others. Bradford and Clausen are both expected to be first-round picks, with Bradford a probable top five selection.

The Redskins hold the fourth overall selection in the draft.

Allen was asked if the Redskins would rule out drafting a quarterback due to the acquisition of McNabb.

"No," he replied. "We're very pleased to have Donovan McNabb. When the 37th pick comes up in our draft room, there's going to be a nice cheer that we selected Donovan McNabb this year. We've evaluated the players based on the Redskins board."

Regarding the visits with QB prospects, Allen said it was "very important to talk with them."

"We really got to know them even better, even though it was the third or fourth time we met with them," Allen said.