in 2025 While growing up in Arizona, Doan played in the Phoenix Jr. Coyotes program. The
Chicago Steel of the
United States Hockey League (USHL) selected Doan with the 95th overall pick of the 2018 USHL Futures Draft. On June 21, 2019, Doan announced his commitment to play for
Arizona State University. He began his collegiate career at ASU in the
2021–22 season. In his second year of draft eligibility, Doan returned to the Steel and emerged as one of the scoring leaders on the USHL's
Clark Cup championship team. He finished third on both the Steel – behind
Sean Farrell and
Matthew Coronato – and in the entire league with 70 points (31 goals, 39 assists) in 53 games. The
NHL Central Scouting Bureau ranked the 19-year-old Doan as the 87th-best North American skater eligible for the
2021 NHL entry draft. Following completion of his sophomore year as captain of the Sun Devils in the
2022–23 season, Doan concluded his collegiate career by signing a three-year, entry-level contract with the Arizona Coyotes on March 16, 2023. With his contract not due to commence until the
2023–24 season, Doan was signed by the Coyotes'
American Hockey League (AHL) affiliate, the
Tucson Roadrunners, for the remainder of their season. Doan began the 2023–24 season with the Roadrunners, leading the team in goals (26) and points (46) before being recalled to the Coyotes on March 25, 2024. The following day, Doan made his NHL debut and scored two goals (including the game-winning goal) in a 6–2 victory against the
Columbus Blue Jackets, and became the first player in franchise history to score multiple goals in their debut. At the completion of the
2024–25 season, Doan was traded by the rebranded Utah Mammoth, along with
Michael Kesselring, to the
Buffalo Sabres in exchange for
JJ Peterka on June 25, 2025. On January 21, 2026, the Sabres signed Doan to a seven-year, $48.65 million contract extension. At the time of signing, Doan had appeared in 49 games and had career highs in goals (15), assists (20), and points (35) in a season. He scored his first playoff goal on April 26 during Game 4 of the Sabres' first round series against the
Boston Bruins during the
2026 Stanley Cup playoffs. ==International play==