According to a press release, the Cardinals acquired reliever Blaine Boyer from the Braves for outfielder Brian Barton.
Boyer, 27, was designated for assignment on Saturday to make room for Jo-Jo Reyes. When he's right, Boyer is able to get strikeouts and groundballs. Last year he dealt with a sore knee.
Barton, 26, was taken by the Cardinals from the Indians in the 2007 Rule 5 draft. He hit .268/.354/.392 in 179 plate appearances last year while playing mostly left field. Barton, an aerospace engineering major in college, was a well-regarded five-tool player prior to a 2006 knee injury. Atlanta's less-crowded outfield should present a better opportunity than St. Louis, though Barton will initially head to Triple A.