Boston was 2 for 16 and shot 35 percent overall in the first half.
Kelly Olynyk, the hero of Game 7 against Washington with 26 points, was held scoreless in the opener against Cleveland until Boston's last shot of the game.
BOSTON (AP) - LeBron James did pretty much whatever he wanted to against the Celtics in the Cavaliers' dominating win in Game 1 of the Eastern Conference finals.
James, looking to advance to his seventh consecutive NBA Finals (the most since Bill Russell in the 1960s) grabbed nine rebounds and seven assists while posting his seventh consecutive 30-point game.
With home-court advantage gone, the Celtics face a virtual must-win Game 2 on Friday night.
"Amazing, but he's better than when I first got into the league", Celtics fourth-year coach Brad Stevens said.
"I just think that they were the more aggressive team with more energy, and they got us down from the beginning", said Celtics center Al Horford, who had 11 points and eight rebounds.
LeBron James scored 38 points and Kevin Love scored 32 with 12 rebounds for Cleveland, which led by 22 at the half and extended it to 28 points in the third quarter.
This isn't the first time LeBron has played it causal this postseason. "I saw it in Kev this morning".
Point guard Kyrie Irving finished with just 11 points and six assists, while opposing point guard Isaiah Thomas finished with 17 points and 10 assists, but it was Irving who got the last laugh.
"They were the better team tonight". Obviously, we don't know the exact adjustments but we know they're gonna make adjustments. "They were more physical", Thomas said. On top of his defense, Brown chipped in 10 points on 5-of-7 shooting, and he added nine rebounds for good measure. Hardly. So much has happened in LeBron's career since that series took place, and we doubt he's still using a missed opportunity from almost a decade ago as his lone source of motivation.
It was the Cavaliers' 12th straight playoff win - one short of the National Basketball Association record. They have already steamrolled their way into the Eastern Conference finals by beating the Indiana Pacers and the Toronto Raptors, and they did this without dropping a single game. Boston must find a way to slow down James while not getting eaten up by a supporting cast, which other than Kevin Love's big game, didn't produce at its usual high rate. "We're just kind of riding it".