Donald Martin Fehr is an American former sports executive. He was the fifth executive director of the NHL Players Association from 2010 to 2023. He became nationally prominent while serving as the executive director of the MLB Players Association from 1983 to 2009.

The National Hockey League Players' Association is the labour union for the group of professional hockey players who are under Standard Player Contracts to the 32 member clubs in the National Hockey League (NHL) located in the United States and Canada. The association represents its membership in all matters dealing with their working conditions and contractual rights as well as serving as their exclusive collective bargaining agent.