When They Pull Out a Knife, The Cubs Pull Out Jeff Baker
The Cubs countered the Cardinals acquisition of Mark DeRosa with one of their own, acquiring 2B/3B Jeff Baker from the Colorado Rockies. It's like countering a handgun with a slingshot. Seemingly running out of players to put on the disabled list, Baker is already on it with a left hand sprain suffered back in April, so he should fit right in with the Cubs. He did start a rehab assignment in mid-June, so I presume he's ready to play again and the Rockies were just out of roster space.
The player the Cubs are sending back is unknown at the moment, most likely a player to be named later.
UPDATE: The Cubs send Hi-A Daytona pitcher, Alberto Albequerque to the Rockies. I can't tell you anything about him other than he was having a nice season for the Cubs and he had shoulder surgery back in April of 2008.
UPDATE #2: The Cubs will DFA Ryan Freel to make room on the roster. They have 10 days to try and trade him for a spare minor league part, but chances are he'll just get released.