MacDougal, who turns 34 in March, was an All-Star in 2003 as the closer for the Kansas City Royals, but in the last two years bounced around four organizations. He made 18 appearances for the Cardinals last year with a 7.23 ERA and spent most of the season at Triple-A.
His acquisition is likely designed to provide the Dodgers with protection at Triple-A.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.