Alzolay will start Sunday against the White Sox, Jordan Bastian of MLB.com reports.
The Cubs didn't seem to have a rotation spot open for Alzolay, but they'll move Jose Quintana, who's still building up his pitch count following a lat injury, to the bullpen for the final few days of the year. Alzolay has made three starts and two relief appearances this season, posting a 3.31 ERA and a 1.29 WHIP.