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This is an offense with a LOT of weapons. Marcus Lattimore has proven to be a beast to tackle when the offensive line opens holes. Alshon Jeffery is making a case for being the best WR in the country.
Tori Gurley, Ace Sanders and D.L. Moore are all very, very good, though they get outshone by Alshon at times.
Stephen Garcia has been up and down, but more up than down overall. Take away two crucial fumbles against Auburn, and he may be getting himself in the Heisman conversation as the leader of a top five-ranked team. However, you can't take away mistakes, as Garcia knows all too well.
He played his best game ever against Alabama, not coincidentally because the OL played their best game ever.
The key here is Garcia's decision-making and the offensive line's play, which are intertwined. If South Carolina's OL can block like they did against one of the hardest teams in the country to block, Alabama, then this offense is by far the best in the SEC. If they can't, Garcia will likely make some bad decisions, and Lattimore will find trouble getting to a place where he can use his tackle-breaking ability to wear defenses down.
In my experience, teams rarely regress on the offensive line after a statement performance like the Alabama game unless there is a major injury.