The Yankees have acquired outfielder Justin Maxwell from the Nationals for minor league right-hander Adam Olbrychowski. Maxwell, 27, has a .201 average in three big league seasons with nine homers and 26 RBIs. Olbrychowski, 25, was 3-2 with a 3.90 ERA in one start and 31 relief appearances last year for Class A Tampa and Double-A Trenton.