5:30pm: The haul for Lugo is bigger than originally thought. The Sox receive a player to be named later or cash along with Duncan, according to the team's press release.
3:32pm: Bernie Miklasz of the St. Louis Post Dispatch reports that the Cardinals will trade Chris Duncan to the Red Sox for Julio Lugo. Via Twitter Miklasz says the Red Sox will still pay Lugo's salary and Sean McAdam of the Boston Herald agrees.
Duncan has a career .851 OPS against right-handers and is under team control through 2012. Reid Laymance of the Post-Dispatch says the Red Sox are expected to assign Duncan to Triple A Pawtucket.