I think that White just went through a normal year of rookie RB struggles, just like CJ did last year. Since he was a 5th-round pick, it's not like they were counting on 1,000 yards from him this year.
There is a possibility of FJ, CJ, Choice, White, and Bruce Hall coming to camp next year. If that is the plan, I can't imagine adding another RB, unless he is a UDFA.