Barnes is the first of Oakland's 17 unrestricted free agents to re-sign with the team.
Barnes has spent the past four seasons with the Raiders. He has played 47 games and started 30 over that span. He has started 25 games at right tackle the past two years, missing seven games in 2012 with a groin injury.
Barnes was originally drafted in the second round by the Jacksonville Jaguars in the 2005 NFL Draft. He first signed with the Oakland Raiders in 2009 as an unrestricted free agent and has re-signed each offseason to stay with the Raiders.
Copyright 2013 by The Associated Press