The St. Louis Cardinals have acquired left-handed pitcher Mike Maroth from the Detroit Tigers, ESPN the Magazine's Buster Olney reports. It is not yet known what the Tigers are getting in return for Maroth, who is 5-2 in 13 starts with a 5.06 ERA this season. Maroth has a career 50-62 record and 4.81 ERA over six major-league seasons, all with the Tigers.