The Rockies recalled Herrera from Triple-A Albuquerque on Monday.
The move corresponds with the Rockies placing southpaw Jose Quintana on the 15-day injured list due to a left elbow sprain. Herrera has spent the entire 2026 season in Triple-A, where he has a 5.16 ERA, 1.76 WHIP and 34:14 K:BB across 22.2 innings. Herrera's first appearance out of the Rockies' bullpen will also be his official major-league debut.