Ellsbury's baserunning was worth about 5.6 runs last year, total. 7.5 runs year before last. His total offensive contributions (batting and baserunning) are in Kosuke territory, given about the same amount of PA. And last year at least, UZR had him as one of the worst defensive CF in baseball (along with Kosuke, Fowler, and Wells) How many of our top prospects would you give up for another Kosuke? But, wouldn't you expect Ellsbury to still get better, given his age? Add in his cost factor and I think he'd be a very welcome addition, especially given our payroll situation. That said, I don't see us going after him, nor San Diego wanting to part with him, IF they even acquire him. He's 26, so he's just entering his prime. Still, his swing and body aren't exactly conducive to adding a bunch of power and from what I've seen, it seems the big green monster is responsible for a nice chunk of his doubles power already. So do I see him getting better? No, not significantly. Ellsbury is a nice little player, I'm not trying to deny him that. However, the marginal value that he provides over somebody like Fuld simply isn't worth the cost in prospects it would take to acquire him. In all likelihood the Cubs would be best served to hold onto those trade chips and wait til midseason to see if a better player doesn't become available.