On November 30, 1958, the Colts clinched their first Western Conference title. Four weeks later, the team won its first NFL Championship, beating the New York Giants 23–17 at Yankee Stadium in what is regarded as "The Greatest Game Ever Played," six years after Rosenbloom purchased the team. The televised game, a sudden death thriller, served as a launching point for the start of the NFL's enormous boom in popularity.