In November 1917, Gorman, George Kennedy, Sam Lichtenhein and Mike Quinn all played a part in suspending the NHA and forming the National Hockey League in an effort to rid themselves of Toronto NHA owner Eddie Livingstone. Gorman became the manager and part-owner of the Senators at that time. He helped lead the team to Stanley Cups in 1920, 1921, and 1923. He sold his interest in the Senators in 1925 to Frank Ahearn and became manager-coach of the New York Americans, introducing professional hockey to New York City.