Patriots released NT Isaac Sopoaga. The move creates $2.5 million in cap space, and $3.5 million in real savings. Sopoaga was just one year into a three-year deal, though he signed the pact with the Eagles, not the Patriots. He was acquired by the Pats last October. He struggled to plug the run as injuries battered the Patriots' defensive line. An 11-year veteran, Sopoaga turns 33 in September.