In 1967, the NHL doubled in size from six to 12 teams, marking the largest expansion ever undertaken at one time by a professional sports league. Four of those six teams -- the Los Angeles Kings, the Philadelphia Flyers, the Pittsburgh Penguins, and the St. Louis Blues -- are celebrating their 50th anniversary seasons this year.
But two of those six expansion teams are not. The California Seals turned Cleveland Barons merged with the Minnesota North Stars in 1978, and the North Stars headed south to become the Dallas Stars in 1993.
Before that history unfolded, there was a game: the first NHL game in the state of Minnesota, played on October 21, 1967.