The Guardians optioned Aleman to Triple-A Columbus on Saturday, Tim Stebbins of MLB.com reports.
Aleman has given up one run in 4.1 innings since coming up from Triple-A last week, but the Guardians will send him back to the minors in order to add a fresh arm to their bullpen in Logan Allen. Now sporting a 3.38 ERA through 18.2 MLB innings, Aleman has a strong chance to return to Cleveland at some point during the final stretch of the season.