[3] He made his senior debut for the side in the USL Championship on April 30, 2021, against Hartford Athletic, coming on as a 77th-minute substitute in a 2–3 defeat.
[5] On June 16, 2021, Mitchell helped New York to a 3–1 victory over Charlotte Independence, scoring the team's third goal of the match.
[7] On February 25, 2024, Mitchell made his debut for New York Red Bulls, entering in the 77th-minute for Elias Manoel in the opening match of the season, a 0–0 draw against Nashville SC.
On March 17, 2024, Mitchell scored his first goal of the season for New York Red Bulls II in a 2–0 victory over Columbus Crew 2.
[9] On April 14, 2024, Mitchell scored four goals in a 5–5 result against Chicago Fire FC II, however, he suffered a knee injury in the match that would keep him out for the remainder of the season.