I don't really see the gamble. Sure he's a rookie in a split carry system, but I look at the other side of it more than rushing. He's a great pass catcher, with one of the best QB's in the league at dumping passes to a pass catching RB...Drew Brees. Brees is already used to having a back like Bush at his disposal in LT, and we all know how well they did the past 2 years.