According to Jim Trotter of SI.com, the Raiders signed the 31-year-old Pro Bowl defensive tackle to a two-year, potential $30 million deal that includes $22.5 million in guarantees.
Trotter says the move gives the Raiders the option of using the franchise tag on free-agent tight end Zach Miller.
Seymour was acquired from the Patriots in 2009 in exchange for Oakland's 2011 first-round draft pick (#17 overall pick).
