I had to go check that again in case i remembered wrongly but yup, they were the first: http://fox13now.com/2016/06/19/cleveland-becomes-first-team-to-overcome-3-1-deficit-to-win-nba-championship/
The Cavs don't have a strong supporting cast and it shows :(
well remembered :) Yeh exactly the Cavs have one superstar and Golden state have a team.