They entered halftime with the same amount of turnovers as made field goals (11); and just 32 points, which was only two more than the Cavaliers tallied from the 3-point arc alone.
Similar to Game 1 Thursday, when Cleveland jumped out to a commanding 22-9 lead, it dominated from the jump during Saturday's Game 2.
Richard Jefferson added 10 points, while fellow reserve Kyle Korver scored eight.
After having lost Games 1 and 2 at the TD Garden in blowout fashion, sitting Thomas for the remainder of this series might be the best and wisest course of action.
James scored at least 30 points for a career-high eighth consecutive playoff game. They were down 0-2 to the eighth seeded Chicago Bulls in the opening round of the playoffs before winning four straight.
J.R. Smith chased down a loose ball in the corner, turned and flung a fading, desperation shot over shoulder. Rookie Jaylen Brown had a nice game, scoring 19 points on 7-for-11 shooting, but with all due respect, is Jaylen Brown going to lead the Celtics to the NBA Finals? I'm not sure I can say the same for the Cavs, who could come into this game overconfident and a bit complacent. It's the first time since 2008 that he won't finish in the top three. Out of the break, the Cavaliers outscored the Celtics, 11-8, over the final four minutes of the quarter. It was the worst loss in a conference finals game in Celtics history.
He was limping at the end of the first half, as the Celtics were dominated 72-31 for the biggest halftime deficit in the history of the National Basketball Association playoffs.
Boston's recently-minted All-NBA point guard Isaiah Thomas was ruled out for the remainder of the contest with a right hip strain, the team announced. Kevin Love had 21 points and 12 rebounds for Cleveland, which led by 14 points after one quarter, by 72-31 at the half and by 46 after three.
But while the Cavs' defense was good, the offense was even better and the big three for Cleveland led the way as usual. Love continued the run when he converted a three-pointer and threw down a driving dunk that was set up by a pass from Irving.
The second half was extremely hard to watch. The Cavs got a week of rest in-between each round of the playoffs after sweeping their first- and second-round opponents easily.