The Raiders don't have a single passable offensive tackle under contract for 2014 - they had three tackles get meaningful snaps, two of them played poorly, and all three are free agents.
There is no way, no earthly imaginable scenario short of him retiring, in which Jared Veldheer is not a Raider next season. Sure, you could make Veldheer or Matthews play on the right, but when you have so many other holes in your roster, why the freak would you? Take one of the many players who fills one of the many holes rather than trying to do positional switches with the #5 overall.
Sorry, I think this is a daft pick.