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Georgia QB Aaron Murray
This one is a no-brainer.
Georgia is loaded and deep at virtually every position on its offense, but having a viable backup behind quarterback Aaron Murray is one of the biggest (and only) questions facing head coach Mark Richt and offensive coordinator Mike Bobo.
The job would be Hutson Mason's if Murray misses time, but can he do what Murray does? I don't think so.
Murray set single-season touchdown records in 2011 and 12, throwing for 35 and 36 touchdown passes, respectively. He has great accuracy, a firm grasp of the offense and played much smarter last year than he did as a sophomore.
But Murray's presence is huge for another reason. Georgia's defense suffered massive roster turnover, which means that its effectiveness in 2013 is up for debate. I've gone on record saying that the newcomers will actually play better than the All-Star cast that left last season.
I could be wrong, though. If I am, it might not be that big of an issue because we know that Murray can lead the Bulldogs if they're forced into shootouts.