Chris Mortensen of ESPN reports that the Oakland Raiders are shopping defensive end Derrick Burgess. Burgess, who spent four years with the Eagles before signing with the Raiders and spending four seasons there, could end up being traded back to Philly, per Mort. Another potential target is the Panthers. Burgess is entering the final year of his contract. According to NFLPA records, he’s due to earn a base salary of only $2 million in 2009.