Anthony Spencer switches agents

Cowboys outside linebacker Anthony Spencer switched agents over the weekend.

He's left Roosevelt Barnes and he will sign with Jordan Woy, according to a source.

The Cowboys placed the franchise tag on Spencer at a cost of $8.8 million. Spencer hasn't signed it because he would like a long-term deal. But the Cowboys and Barnes were unable to reach an agreement on a new contract.

In 2011, Spencer was second on the team with six sacks and 31 quarterback pressures. He led the team with four forced fumbles and was tied with Sean Lee with eight tackles for loss.

Today starts the voluntary offseason program at Valley Ranch and it hasn't been determined if Spencer will arrive. Several other NFL players who have been franchised -- Matt Forte, Drew Brees and Ray Rice -- are not expected to show up for the start of their teams' voluntary offseason work.

UPDATE: Spencer did not attend Monday's workouts.