(Renton, WA)  --  Seahawks defensive tackle Brandon Mebane [[ MEE-bane ]] is headed to San Diego.  Mebane has announced he's signing a three-year deal with the Chargers as an unrestricted free agent.  Seattle linebacker Bruce Irvin has confirmed he's signing a 37-million-dollar free-agent contract with Oakland.  Fox Sports is reporting that free-agent Seahawks tight end J.R. Sweezy will sign a five-year, 32-and-a-half-million-dollar contract with Tampa Bay.