The Raiders have signed free agent 34-year old free agent Greg Spires.  Spires played in 10 games with the Bucs last season and he made 26 tackles, defensed 1 pass and had 2 sacks.  Spires has now played in 147 games in his NFL career and he has made 339 tackles, defensed 17 passes, has 39.5 sacks and he has forced 11 fumbles.  This was a nice depth signing for the Raiders.