The Oakland Raiders have signed offensive lineman Khalif Barnes to a one-year contract extension through 2015, a league source told ESPN.

The deal has a maximum value of $2 million, with a $970,000 base salary, $30,000 available through an offseason workout bonus, a $500,000 roster bonus due on the fifth day of the 2015 league year and up to $500,000 more in incentives.

Barnes, 32, has started six of the seven games that he has played this season, beginning the season at right tackle, though he is likely to play left guard against the San Diego Chargers in Week 11 in place of the injured rookie Gabe Jackson.

Originally a 2005 second-round pick of the Jacksonville Jaguars, Barnes has been with the Raiders since signing with them as a free agent in 2009. In total, he has logged 109 starts in 130 games played.