Eric Patterson doesn't have much trade value right now. While Marshall isn't a prospect anymore, his value is really high...it's quite a bit to give up for an improvement at an already steady position (giving up two potential starters and our only hedge against a full year of Theriot at SS). You don't think Beane might take the slightest of interest in Murton or Patterson (considering they might deal Ellis, and Beane isn't crazy about defense)? Yeah, they've kept Mark Kotsay around for his awesome bat. I'm sure teams were dying to add his 8 million salary to their payroll. I'm sure you've read the book, Beane will sacrifice defense for certain hitting characteristics. Kotsay was acquired by Beane at one point, primarily for his defense. Jay Payton, Mark Ellis, Marco Scutaro, Milton Bradley, Chris Singleton. They've played quite a few guys primarily for their defense.