The Cardinals are planning to sign defensive tackle Isaac Sopoaga, reports Kent Somers of AZCentral.com (via Twitter).
The team worked out Sopoaga earlier today, and could view him as a potential replacement for Darnell Dockett, who is lost for the season to a torn ACL.
Sopoaga started his career with the 49ers, before leaving in free agency to join the Eagles in 2013. Despite signing a three-year deal, he was traded to the Patriots midseason.
The Patriots released him earlier this offseason, as he failed to positively contribute to the team in limited action last year.