Who should I pick up on waivers?

[jumpman23j]

I want to pick up a player off waivers but don't really know who to pick up, here's some players i'm thinking of:

RB John Kuhn
WR Louis Murphy
RB Kenneth Darby (I have SJAX)
WR Mario Manningham
WR Lance Moore
RB Ryan Torain
WR Brandon Lloyd

Or should i just keep Michael Crabtree? Thanks for the help.

[gocards]

With the limited info you have given, the only player on that list I would drop Crabtree for is Lloyd. I probably wouldn't do it myself this early though.