The Rockies optioned Bird to Triple-A Albuquerque on Monday.
The transaction frees a roster spot for the return of Antonio Senzatela (elbow), who is back from the 60-day injured list to make his season debut Monday against the Diamondbacks. Bird holds a 4.95 ERA and ugly 28:25 K:BB over 36.1 frames with the big club in 2024.