What did Kyle Shanahan and John Lynch think when they watched the right side of our offensive line’s feeble attempt at a zone blocking scheme last season? Trenton Brown is a big strong mountain of a man and Joshua Garnett is a promising young first round pick but neither of them are known for being athletic enough to be the kind of players you would pick up to play in a zone blocking scheme. It doesn’t take much to see how they felt about Vance McDonald’s roll. They brought in a blocking tight end even though Vance is mainly known for his blocking, who just happens to be more familiar with this system.