The 49ers on Saturday agreed to terms with RB Tim Hightower. The veteran joins Mike Davis, Raheem Mostert and DuJuan Harris -- who re-signed earlier this week -- behind starter Carlos Hyde. If you're looking for a Hyde handcuff, Hightower looks like the current best bet. He carried 229 times and caught 34 passes as New Orleans' #2 back over the past 2 seasons. We'll see what the new coaching staff thinks of Davis and whether the Niners add another RB in the NFL Draft.