He has played 14 games in the National Hockey League for the Dallas Stars, Calgary Flames and New York Islanders.

[1] As captain of Medveščak, Alan scored 10 goals and 19 assists for 29 points in 50 games to finish second among defensemen on the team.

On July 22, 2014, Letang announced that he has ended his playing career, but would stay at KHL Medveščak Zagreb as an assistant coach.

[3] After two years on the Zagreb coaching staff and a total of seven seasons with the club,[4] Letang headed back to his native Canada and was named assistant coach of the Owen Sound Attack of the Ontario Hockey League (OHL) on June 21, 2016.

[7] In 2023, Letang was named head coach of Team Canada in the 2024 IIHF World Junior Championship.