Some names that pop out for me
Brian Westbrook: Not a ton of power, but still able to make defenders miss which is what the staff liked about Williams. He isn't big, but has experience blocking out of spread formations, and he has sold hands which the Cardinals also liked about Williams. Perfect fit, no. But might be the best option out there for what we do on offense.
Ledell Betts: Got 3rd down time in Washington when he was there and has decent hands. Not explosive, but more powerful than Westbrook. Not as good as Hightower, but could be a reliable option behind Wells that runs with more power than LSH.
Tiki Barber: He is old, and has been out of the league for awhile, true. But, he is in great shape and might be worth a flier. He is obviously a sub player at this point, but brings solid vet experience. Not sure he is much of a leader, but he did overcome fumbling issues, and might be able to pass that knowledge to Wells. Low risk for a player that could be versatile.
Some wait and see's...
How many running backs are the Pats going to really keep? They have Ridley, Vreen, Sammy Morris, Ben Green-Ellis, & Danny Woodhead. Might be worth waiting to see who they try and sneak onto the practice squad.
What are the Panthers going to do with Mike Goodson? He is injured rightnow, but was solid last year. Might be worth a 2013 pick.
The Texans has Arian Foster, Ben Tate, Steve Slaton, Derrick Ward and Chris Ogbonnaya. Is Tate available for trade? Will try and sneak Ogbonnaya onto the practice squad? Some possible options here.
The 49ers have Gore, Dixon, Omon and Kendall Hunter. Not great backups, but some low risk possibilities.
There might be solid cut options down the line. I think that the Cards probably will sign a vet soon for preseason reps, and snatch a better upside practice squad/roster cut player closer to the beginning of the season.