I cannot think of one thing that the guy does that he is really all that above average at. Hitting? Nope. Fielding? Not really, he can't even hit the cutoff man or throw to the right base. Does he do the little things, like moving guys over? No, not at all (witness numerous three pitch strikeouts in key situations). Does he hit for power? Not really. Average? No, not really. Does he make the pitcher work? Not at all.
He is pretty much completely useless. And Sabean signed him for 5 years and 60 million dollars. Great. How often will we have to hear about that when it comes time to make a move? At least Failgar is off the books next year and Zito has been at least somewhat effective this year.