Which former WHA team won its first Stanley Cup in 1984?

The Edmonton Oilers became the first former WHA team to win the Stanley Cup in 1984.

Edmonton defeated the New York Islanders four games to one in the Final, earning the first championship in franchise history. The Islanders were seeking a fifth consecutive title, having won the previous four Cups, but the Oilers ended that dynasty with a high-powered team built around stars such as Wayne Gretzky, Mark Messier, Jari Kurri, Paul Coffey and Grant Fuhr.

The Oilers had joined the NHL in 1979 when the World Hockey Association folded and four WHA clubs were admitted. Their victory came in only their fifth NHL season, making Edmonton the fastest Canadian-based expansion team to win a major professional sports championship at that time. Mark Messier won the Conn Smythe Trophy as playoff MVP.

A common mix-up is to identify the Islanders as the 1984 champions because they had dominated the early 1980s. They were the defending champions, but Edmonton won the final three games in a row after splitting the opening two.