There's a few other things to take into account. Many believe, Meph included, that DeRosa won't repeat the season he had last year next year. I was a big DeRo supporter from the get-go, but it's not like he's a proven entity or a certainty. Of course, the same could be said for Roberts, but I think a lot of people underestimate how good Roberts is. Last year, Roberts had a WARP of 7.1 last year (DeRo's was 4.5, FWIW). That's a fairly big difference. In 2006, Roberts had an off year at 4.2, which is still right in line with what DeRosa did for us last year. In 2005, Roberts had a WARP of 9.4. Maybe he was on steroids that year, who knows? I think what I'm trying to get at is that DeRosa, at his best, is about as good as the baseline of what we can expect from Roberts, while BRob also has the potential to be much more productive. On top of all that, as others have mentioned, DeRosa taking those ABs away from the lesser bench players can wind up being a big factor as well. Hell, who knows, maybe at some point he'll even take the SS job from Theriot (doubtful, though).