The Cardinals added Justin Masterson yesterday. The difference with this move is that Lackey is under control through the 2015 season, while Masterson is only with them in 2014. Nothing yet on who they gave up.
UPDATE 12:38 PM: Heyman says that the Red Sox are getting a major league ready outfielder and a pitcher back.
Tim is the owner and editor in chief of Pirates Prospects. He started the site in January 2009, and turned it into his full time job during the 2011 season. Prior to starting Pirates Prospects, Tim worked with AccuScore.com, providing MLB, NHL, and NFL coverage to various national media outlets, including ESPN Insider, USA Today, Yahoo Sports, and the Wall Street Journal. He also writes the annual Prospect Guide, which is sold through the site. Tim lives in Bradenton, where he provides live coverage all year of Spring Training, mini camp, instructs, the Bradenton Marauders, and the GCL Pirates.