High Quality Content by WIKIPEDIA articles! The National Hockey League (NHL) has endured a tumultuous period of history in recent years. It has grown from 22 teams in 1992 to 30 today as the league expanded across the United States. Repeated labour conflicts interrupted play in 1992, 1994–95 and 2004–05; the latter caused the entire 2004–05 NHL season to be canceled, the first time in North American history that a sports league has canceled an entire season in a labour dispute. Five franchises have relocated during this time: the Minnesota North Stars became the Dallas Stars (1993), the Quebec Nordiques became the Colorado Avalanche (1995), the Winnipeg Jets became the Phoenix Coyotes (1996), the Hartford Whalers became the Carolina Hurricanes (1997), and the Atlanta Thrashers became the second franchise known as the Winnipeg Jets (2011).