The Oakland Raiders have continued their effort to upgrade the talent on the roster via the expenditure of enormous amounts of money by signing free-agent defensive end Kalimba Edwards.

The deal, per Adam Schefter of NFL Network, is for two years and pays $5 million.

Edwards was released on March 13 by the Detroit Lions.  He visited the Titans a few days later, but otherwise generated not much interest.

A second-round draft pick in 2002, Edwards spent six seasons with the Lions, appearing in 87 games and starting 22.  He has 26 career sacks.