Don't worry TOO much about Sproles, RB2 is the easiest position to replace. Or do what D'Z said.
Too many Smiths! :why:
As a consistent producer I wouldn't want to rely on him, but he's a nice guy to consider as a depth/flex option (albeit with hiim having 3 solid WR's maybe he should take the upside of Hunter) and will outplay his really low ADP.
Despite being known for his deep ball, Flacco's always been at his best with a tough, possession type WR to throw to like he did with Mason all those years and during the playoff run with Boldin, he has the most targets this preseason and has done the most with his targets, the whole crew's been talking him up through training camp, and of course he's a fine RZ target.
He shouldn't be the Smith that's irrelevant in fantasy this year and I'd expect him to put up better stats than Torrey's done in recent years, but can understand you being skeptical due to the Baltimore offense and how much it's burned you. Great value, though.
And if you don't mind me asking, where do you normally play in your money leagues?