Bird was optioned to Triple-A Albuquerque by the Rockies on Saturday.
Bird made just two appearances in the Cactus League before being moved down, and he allowed three runs -- two earned -- with two walks and a strikeout over 1.2 innings of work. The right-hander will likely be back with Colorado at some point in the season, but for now Bird will report to the Isotopes and work in the Pacific Coast League.