As it stands now, Khalif Barnes is the projected starting right tackle for the Raiders.
A few articles have spoken of Langston Walker as the starting tackle, but in his second tenure with Oakland he has only played guard.
Khalif Barnes was an okay starting left tackle for the Jacksonville Jaguars prior to becoming a free agent, and may make us a competent right tackle with Oakland.
He had a nightmare 2009, going down with a serious leg injury in training camp, and then performing badly in limited action on his return. Needless-to-say, he will have to up his game considerably this year.
But the Raiders aren't waiting on Barnes to come through, they drafted two offensive linemen this year.
Jared Veldheer, who at 6'8" and 315 pounds, is a monster prospect from the mall Hillsdale College, and has a lot of potential. In the short shuttle and three-cone drill, he was also the fastest offensive lineman at the NFL Combine. He has shown the ideal athletic ability and short-area quickness to fit into a zone-blocking scheme.
I expect Veldheer to push Barnes hard for the starting spot in camp, and possibly even unseat him by mid way through the season.