It seems that we have a full complement of RB/FB's, and can now focus on upgrades, camp competition and insurance against injures. Maybe a draftee can make the 53 maybe not.
Burkhead, Gillislie, Hill, White, Bolden, Develin
As of now, Gillislie and Hill compete for the active roster spot as the short yardage RB. The other usually would be inactive as Gillislie was.
Obviously, it is possible that the team has seen enough of Gillislie and will simply cut him for the cap space. Personally, I see no reason to do that any time soon. If nothing else, he could be cut in August if there are no injuries and a draftee isn't worthy of a roster spot.