The Athletics have traded outfielder Eric Patterson to the Red Sox for minor league lefty Fabian Williamson, according to the team's official Twitter feed. Patterson had been designated for assignment earlier this week.
The Red Sox just lost Dustin Pedroia for as much as six weeks with a fracture in his foot, and the 27-year-old Patterson has considerable experience playing second base. He's a career .224/.301/.340 hitter in 378 big league plate appearances, and is capable of playing all three outfield positions in addition to the keystone spot.
Boston originally acquired Williamson from the Mariners for David Aardsma last January. The 21-year-old has a 3.72 ERA with a 5.5 K/9 and 4.7 BB/9 this season, playing for the team's High-A affiliate.