The Guardians recalled Dion from Triple-A Columbus on Saturday.
Dion will come up from the minors to give the Guardians an additional fresh arm for their doubleheader against Pittsburgh. The 26-year-old has given up seven earned runs in just 11.1 MLB innings this season, so he'll likely be limited to low-leverage situations. Codi Heuer was sent down to Columbus in a corresponding move.