... ok. They were already pretty solid at RB, so to whatever extent this helps them, the benefit will be marginal. Would've been a lot more productive to bring in some veteran help at literally any position on their defense, or any OL position except LT.
Over the course of the season, it should help them keep Frank Gore fresh, so it's not a useless signing or anything. Just not something that I expect to change the complexion of this week's game in any significant capacity.