Also, the 49ers have every reason to like Joe Staley. They signed him through 2017. So the 49ers don't need to spend left-tackle money on two tackles. They have already locked up Staley for the long term. Now, unless a left-tackle upgrade falls in their lap on the cheap, they need only a right tackle.
I have been saying this for so so long. The niners need a RT, not a left. Staley is locked up until 2017, they should be able to grab a RT and not pay him LT money.
If the niners traded up to get OKUng, they would spend LT money on both tackles, leaving little money for other skill positions.