The Cardinals recalled Rondon from Triple-A Memphis on Sunday, John Denton of MLB.com reports.
Rondon will give the Cardinals a fresh arm out of the bullpen capable of covering multiple innings after Drew VerHagen covered 2.1 innings in long relief in Saturday's 5-4 win. Matthew Liberatore, who started Saturday's contest, was optioned to Memphis to clear a spot on the active roster for Rondon.