Colorado Rockies 2018–2021: Minors Bird signed with the Rockies for a
signing bonus of $50,000. He made his professional debut in 2018 with the
Grand Junction Rockies of the
Rookie-level Pioneer League, going 4–1 with a 3.38 ERA and 30 strikeouts over innings pitched in relief. In 2019, he played with the
Single-A Asheville Tourists and was named a
South Atlantic League All-Star. He went 7–2 with two saves and a 3.62 ERA and 80 strikeouts in 87 innings in 40 games, tied for third-most in the league. Bird didn't pitch competitively in 2020, as the minor league season was cancelled due to the
COVID-19 pandemic. He spent the off year learning about pitching analytics and body movement, which increased his fastball velocity. Bird began the 2021 season with the
Hartford Yard Goats of the
Double-A Northeast, inducing a 70.9%
ground ball rate. He was then promoted to the
Albuquerque Isotopes of the
Triple-A West in early June. Over 39 appearances between the two clubs, Bird went 6–1 with a 3.38 ERA and 59 strikeouts over innings. He pitched as a reliever in the
Arizona Fall League for the
Salt River Rafters after the season, and was 0–1 with a save and a 2.84 ERA.
2022: MLB debut Bird returned to the Isotopes to begin the 2022 season. Before he was called up, he had a 2.77 ERA with 34 strikeouts in 26 innings over 22 games, and induced a 64.4% ground ball rate. On June 11, the Rockies selected Bird's contract and promoted him to the major leagues. On July 3, Bird earned his first MLB
win after pitching a scoreless 8th inning against the
Arizona Diamondbacks. In his rookie season, he was 2–4 with a 4.91 ERA in 47 innings over 38 games. Bird was ejected from a May win over the
Philadelphia Phillies after apparently taunting
Bryce Harper after he fanned Harper, leading to a
bench-clearing brawl. Bird was Colorado's most-used reliever in 2023. He went 3–3 with a 4.33 ERA in innings, starting three times. He and
Tyler Holton of the
Detroit Tigers tied for the most innings by any MLB reliever, , which also tied for the ninth-most by a reliever in franchise history. Bird's 70 pitching appearances led the team and ranked 8th in the
National League. He threw the fourth-most for a season in Rockies history among pitchers who had pitched in relief 95% of the time. After struggling in three outings, giving up a grand slam in a loss to the
Miami Marlins and a
walk-off home run to the
Texas Rangers, the Yankees demoted Bird to the Triple-A
Scranton/Wilkes-Barre RailRiders on August 5. He did not return to the majors, posting a 27.00 ERA with New York and a 6.32 ERA in Triple-A. ==Pitching repertoire==