The Rockies reinstated Criswell (elbow) from the 60-day injured list Thursday and optioned him to Triple-A Albuquerque, Thomas Harding of MLB.com reports.
Criswell has spent the entire season on the injured list while finishing up his recovery from a Tommy John procedure he underwent in March 2025. He's already made a handful of appearances in the minors while on a rehab assignment but has struggled to the tune of a 5.91 ERA and 1.50 WHIP over 10.2 innings split between three affiliates. The Rockies will keep him in the minors for the time being, but now that he's back on the organization's 40-man roster, he's a likely candidate to return to the majors at some point once Colorado needs a fresh bullpen arm.