The defending Super Bowl champions already have lost three players to free agency.  And despite having a glut of cap space they’ve signed none.

But now they’re getting involved in the process.  By bringing in for a visit . . . safety Sammy Knight.  According to Mike Garafolo of the Newark Star-Ledger, Knight visited the Broncos, left without a contract, and will head to New York.

Knight has played for the Saints, Dolphins, Chiefs, and Jaguars, starting 15 games during the 2007 season in Jacksonville.  He’d replace Gibril Wilson at a much cheaper price than the Raiders paid for Wilson.