[3] Ahcan grew up in an athletic family as his father was an All-American forward at Gustavus Adolphus College and his younger brothers also play hockey.

[2] By the end of October, Ahcan was the recipient of the Bauer National Collegiate Hockey Conference (NCHC) Rookie of the Week after recording four points over two games, including the game-winning goal.

[14] When the season was cut short due to the COVID-19 pandemic, Ahcan signed a professional contract with the Boston Bruins of the National Hockey League (NHL) on March 26, 2020.

[15] Ahcan joined the Providence Bruins of the American Hockey League (AHL) for their 2021 training camp[16] and recorded his first professional point during a game against the Bridgeport Sound Tigers.

Following three seasons within the Bruins organization, Ahcan left as a free agent and was signed to a two-year, two-way contract with the Colorado Avalanche on July 1, 2023.