This is a video of Brandon Washington vs Cam Johnson.
Keep in mind that he is playing LT but is projected to play OG in the NFL.
He has now declared his intentions to enter the 2012 draft.
I think he would have significant issues trying to play LT in the NFL, but he has great size, athleticism and strength for OG.
By draft time, he will probably be projected much higher than rounds 4-5.