I was watching him too.
First play he run blocked and pushed Vernon a couple yards off the line. I'd give him a B grade.
Second, he was late of the snap and Vernon just ran right by him--Greg stuck his arm out but didnt grab. Total Fail.
Third, good run block--Vernon pushed a couple yards off the line.
Fourth, Verson got into his body, and drove him straight back. Greg's arms were nowhere near Vernon's torso and Verson had the complete levearage advantage.
This is a good trade for us.