Fantasy Football: Who should I play?

I need either a RB or WR to fill in a final spot. It's iffy though.

Should I play...

- Trent Richardson? (He JUST joined a new team and won't arrive til Thurs. It's more likely Bradshaw will get most of the carries.

- Cecil Shorts? (They're playing the Seahawks, though. Best secondary in the game)

- Mo Jones-Drew (Playing the Seahawks and he's done little this year)

- Rueban Randle (Third option WR)

- Kenbrell Thompkins (he's done nothing, but I'm still hoping he figures it out)

- Drop someone and pick up Marlon Brown or Leonard Hankerson? (If this option which one to pick up and who--of list above--to drop?)

What would you do and why?

Thanks!