The National Hockey League was organized on November 26, 1917, in Montreal after the suspension of operations of its predecessor organization, the National Hockey Association (NHA), which had been founded in 1909 in Renfrew, Ontario.The NHL immediately took the NHA's place as one of the leagues that contested for the Stanley Cup in an annual interleague competition before a series of league mergers and folds left the NHL as the only league left competing for the Stanley Cup in 1926.
The National Hockey League was established in 1917 as the successor to the National Hockey Association (NHA).
Founded in 1909, the NHA began play one year later with seven teams in Ontario and Quebec, and was one of the first major leagues in professional ice hockey.
From 1942 to 1967, the league had only six teams, collectively (if not contemporaneously) nicknamed the "Original Six".
The NHL added six new teams to double its size at the 1967 NHL expansion.
He was traded to the Kings in 1988, a deal that dramatically improved the league's popularity in the United States, and provided the impetus for the 1990s expansion cycles that saw the addition of nine teams: the San Jose Sharks, Tampa Bay Lightning, Ottawa Senators, Mighty Ducks of Anaheim, Florida Panthers, Nashville Predators, Atlanta Thrashers now Winnipeg Jets, and in 2000 the Minnesota Wild and Columbus Blue Jackets.
There have been four league-wide work stoppages in league history, all happening since 1992.
Player safety has become a major issue within the past five years and concussions, which result from a hard hit to the head, have been the biggest cause.
With recent studies showing how concussions can affect retired players and how it has decreased their quality of life after retirement, concussions have become a very important topic of debate when it comes to player safety issues.
The league's annual revenues were estimated at approximately .27 billion.