On April 20, 2022, Beaudoin was drafted tenth overall by the
Barrie Colts in the
2022 OHL Draft. On June 3, 2022, he signed with the Colts. Beaudoin played the
2022–23 OHL season for the Colts as a heavily used depth forward, recording 8 goals and 12 assists in 63 games. He was continuously used in the OHL playoffs, where they would lose to the
North Bay Battalion in the eastern conference semifinals in seven games. He recorded 2 assists in 13 games throughout the playoffs. During the offseason, he joined
Canada's under-18 team for the
Hlinka Gretzky Cup, helping the team win gold. Beaudoin entered the
2023–24 season with higher expectations in his
National Hockey League (NHL) draft year. Improving his skating and fitness throughout the offseason, as evidenced by winning the run and bench-press competitions in Colts fitness training, he was expected to be a cornerstone piece for the Colts for the remainder of his OHL career. He was described as a player who "[is] always going to dirty areas of the ice to constantly battle for the puck" and was projected as a serviceable player, similar to
Zach Hyman and
Matthew Knies, in a first or second line in the NHL. At the end of the season, he recorded 28 goals and 34 assists in 67 games. When the OHL's annual year-end coaches poll results were released, he was named the eastern conference's hardest worker, top penalty killer, and second-best defensive forward. He was later signed to a three-year, entry-level contract with the Utah Hockey Club on July 22, 2024. Beaudoin started the
2024–25 season named as an alternate captain for the Colts. Participating in Utah Hockey Club's rookie training camp, he was named as one of the best players in the camp. He moved on to the main training camp, but was sent back to the Colts by the end of training camp. He had a hot start to the beginning of the OHL season, recording seven goals and nine assists in 15 games. In December, he and fellow Colts teammate
Beau Akey were named to the Canada's world junior camp. He was named to Canada's roster on December 13. Throughout the rest of the season, he earned a spot on the power-play unit, recording seven goals and ten assists on the power-play throughout the season. By the end of the season, he had 22 goals and 29 assists in 52 games, helping the Colts clinch the top seed in the central division. The Colts made it to the eastern conference finals before being swept by the
Oshawa Generals; he recorded 13 points in the playoffs. == International play ==