NHL Support Girls

The NHL fought the WHA for players, losing 67 to the new league in its first season of 1972–73, including Bobby Hull, who signed a ten year, $2.5 million contract with the Winnipeg Jets, the largest in hockey history at the time. The NHL attempted to block the defections in court, though a countersuit by the WHA led to a Philadelphia judge ruling the NHL's reserve clause to be illegal, eliminating the elder league's monopoly over the players. Seven years of battling for players and markets financially damaged both leagues, leading to a 1979 merger agreement that saw the WHA cease operations while the NHL absorbed the Jets, Edmonton Oilers, Hartford Whalers and Quebec Nordiques.
Wayne Gretzky played one season in the WHA before joining the NHL in 1979–80 with the Oilers. He went on to lead the Oilers to four Stanley Cup championships in 1984, 1985, 1987 and 1988, and set single season records for goals (92 in 1981–82), assists (163 in 1985–86) and points (215 in 1985–86), as well as career records for goals (894), assists (1,963) and points (2,857). He was traded to the Kings in 1988, a deal that dramatically improved the NHL's popularity in the United States, and provided the impetus for the 1990s expansion cycles that saw the addition of the San Jose Sharks, Tampa Bay Lightning, Ottawa Senators, Mighty Ducks of Anaheim, Florida Panthers, Nashville Predators, Atlanta Thrashers, Minnesota Wild and Columbus Blue Jackets.
• Labour issues
There have been three league-wide work stoppages in NHL history, all happening between 1992 and 2005.