Injured RBs are not normally thought of very highly. Plus look around the league, every team pretty much has their starter set. Ahmad Bradshaw isn't even getting any play and he had 1200 yard rushing last year...but he has bad feet (got both operated on this off season) and fumble issues. Normally injuries at the RB position are enough to scare a team off.
Ronnie may have to wait till someone gets injured before he finds some interest. There are maybe 5 or 6 teams looking for a backup. Pats are set as mentioned above, Jets are set with LT and Greene, Buffalo has Spiller and Fred Jackson...Ronnie won't end up in our division.