Warren will start Saturday's game against the Rockies at Yankee Stadium, Chris Kirschner of The Athletic reports.
Warren was called up from Triple-A Scranton/Wilkes-Barre on Wednesday to take Luis Gil's (back) spot on the active roster, and he'll now slot into Gil's spot in the rotation this weekend. In three big-league starts this season, Warren has an 8.59 ERA with a 17:5 K:BB, though those numbers are skewed heavily by an eight-run start against the Angels on Aug. 7.