Outplayed during two losses in Boston, the Cavs used a three-day break in the series to regroup and re-grip this series. They built a 19-point lead in the first quarter, pushed it to 30 in the second half and overpowered the Celtics, who fell to 1-5 on the road in the postseason.

Any discussion of Cleveland’s demise is premature. Kyle Korver made four of the Cavs’ 17 3-pointers and Cleveland had six players in double figures.

Game 4 is Monday night before the series returns to Boston.

Jaylen Brown was in foul trouble all night and scored just 10 for the Celtics after averaging 23 in the first two games. Jayson Tatum scored 18 and Terry Rozier 13 for Boston.

Only 19 of a possible 300 teams have ever overcome a 2-0 deficit in the playoffs. James and the Cavs, who previously did it in 2007 and again in 2016 while winning the NBA title, took the first step toward a third comeback.

To return to the NBA Finals for the fourth straight year, the Cavs have to win four of five and re-write Boston’s illustrious history. The Celtics are 37-0 when they win the first two games in a series.

“That doesn’t bother me,” Cleveland coach Tyronn Lue said before Game 3. “The games have to be played. They won two games on their home court, which we know they’ve been playing well the whole playoffs, but we’re not discouraged.

“So, 0-2 doesn’t really mean anything.”

Apparently not. The Cavs came in wanting to play faster and be more physical with the younger Celtics, who were the aggressors in Games 1 and 2.

Lue also needed more from point guard George Hill after two poor performances (8 points, 1 assist) in Boston. Hill responded with a driving layup to start the game and drained three 3-pointers in the first quarter as Cleveland wasted no time taking control.

Hill finished with 13, J.R. Smith 11 and Cleveland’s supporting cast played so well that James only had to play 37 minutes.

Boston coach Brad Stevens was confident his team would play better on the road than earlier in these playoffs, but the Celtics were shaky early, committing four turnovers and shooting 2 of 10 while the Cavs opened a 27-11 lead.

James arrived at 5:45 p.m., greeted by the usual phalanx of cameras waiting to record his walk from the security entrance at Quicken Loans Arena to Cleveland’s locker room.

Earlier in the day, James said the fact he has twice rallied from 2-0 deficits in the postseason offered no relief.

“There’s nothing about the playoffs that’s comfortable until you either win it all or you lose and go into the summer,” he said.

Summer might not be as close as it once seemed.

FAMILY TIES

Stevens has deep Cleveland roots, but he’s slowly converting family members to pull for Boston’s teams.

His parents are from Northeast Ohio and his wife, Tracy, is from suburban Rocky River. Before the game, Stevens was asked what happens to all the Cavs, Browns and Cavaliers gear he gets as gifts.

“My 7 1/2-year-old nephew was offered 10 extra-credit points (in school) if he wore anything regarding Cleveland yesterday, and he went all green,” Stevens said. “And three years ago, I think he was all Cleveland stuff. So we’re making strides with him. But yeah, we have a large contingent. Maybe they’ll get some of those (Game 3 giveaway) yellow shirts and pass them around to some people who haven’t completely converted to rooting for the Celtics yet.”

TIP-INS

Celtics: Seeking to become the sixth No. 2 seed to win the East in eight years. Boston was a No. 4 seed when it advanced to the finals in 2010. … Fell to 3-8 in playoff games in Cleveland, the most by a Cavs opponent at the Q. … Stevens was relieved to learn that Boston legend Bill Russell was recovering after a hospital stay brought on by dehydration. Russell won 11 NBA titles with the Celtics. “He’s the ultimate basketball winner,” Stevens said. “The way he impacted winning, the unselfishness of a teammate, what he stood for off the floor — everything about him.”

Cavaliers: James needs six field goals to surpass Kareem Abdul-Jabbar (2,356) for the most in postseason history. … Cleveland has won six straight playoff games at home. … Improved to 14-6 vs. Boston in the playoffs.

UP NEXT

Game 4 is Monday night.