Who should i use in the flex spot week 1?

What else you got? I hate using a "back-up" RB as a starter unless he is money for a TD, like J. Stewart or L. White. Ward and Davis are not #1 on their team...Ward probably lost it to Cadillac and Davis might get it from Lweis at some point. Of the four choices you are giving us, I'd choose Walter, he's at home and the Jets are travelling to Texas.