Peralta will serve as the Rockies' opening pitcher for Tuesday's game against the Rangers, Thomas Harding of MLB.com reports.
Peralta is lined up to make his first big-league appearance of 2026 after being called up from Triple-A Albuquerque on Friday. He'll be expected to work the first inning or two before making way for a bulk reliever, with rigthy Tanner Gordon being the most likely candidate to cover multiple frames out of the bullpen.