The Rockies selected Manfredi's contract from Triple-A Albuquerque on Wednesday.
Manfredi joined the Rockies organization at the trade deadline as part of the deal that sent Antonio Senzatela to Milwaukee. The 26-year-old righty owns a 4.45 ERA and 1.38 WHIP across 28.1 innings at Triple-A this season but has given up six runs in just five frames with Albuquerque since being traded. Despite his recent performance, the Rockies will add him to their bullpen to provide a fresh arm. Parker Mushinski was designated for assignment in a corresponding move.