Need a kicker, which RB should I drop...

[clearman]

10 team PPR league. I have the following RBs on my bench and I don't have a kicker yet:

Donald Brown
Knowshon Moreno
Ahmad Bradshaw
Leon Washington
Fred Jackson (starting this week)

I feel like the rookies have the most upside. I was going to drop Bradshaw, but the Giants Oline will open up plenty of opportunities for him. Right now I'm leaning towards Leon Washington to drop since he seems to be on the waiver wire every year.

[Big Cow]

I like Leon Washington, I think he'll have a bust out year. I'd drop Jackson, the bills have 3 guys on their o-line who have no NFL experience......

[clearman]

I agree that Jackson is the weakest of the RBs I have, but he is getting close to 100% of the carries this week. However they are playing the Pats and will probably be down big and throwing a lot. Also just read Leon is getting offerred a big contract and been lining up at WR in preseason. Thanks for the input.