All three reached the NBA Finals, although the Rockets were the only team to win the championship.
“Everyone is showing tons of energy, all over the city,” Allen said.
“It’s incredible how Cleveland has adopted us. They come to every game, yelling for everything. The city of Cleveland has our backs.”
The Cavaliers, who are top of the Eastern Conference, travel to second-placed Boston Celtics, the defending NBA champions, on Tuesday.
