Before the game was over, James had broken the NBA's all-time playoff scoring list - racking up a career postseason total of 5,995 points and bumping His Airness Michael Jordan down to No. 2.
The win gives Cleveland a 3-1 lead in the best-of-seven series and leaves them firmly on track for a third consecutive NBA Finals showdown against the Golden State Warriors.
As the Cavs' stars did throughout the East finals, they worked together in fire-breathing tandem Thursday.
James had earlier been whistled for his fourth foul with nearly seven minutes left in the first half, sending him to the bench.
The Cavaliers outscored the Celtics 65-42 in the second half, thanks to Irving's playoff career high in points.
At that point, Uncle Drew took over the ballgame - scoring 19 of the Cavaliers'final 21 points in the period and putting Cleveland squarely in control of the contest.
Kyrie Irving gritted his teeth, tightened up his left sneaker and hopped to his feet.
Nothing was keeping him out. They didn't shoot particularly well from the field - Marcus Smart's shooting, as expected, came back to earth - but the Celtics were 19-for-20 from the line and scored at a solid rate, especially when you consider that they were missing their leading scorer.
James led the way with 11 points on a flawless five-for-five effort from the field.
Lue said didn't deliver any inspiring speech to his players before practice. "Just come out, be aggressive, in attack mode like he has been over the last four or five months".
Lue paused for several seconds before responding to a question about the third and fourth fouls called on James, who was whistled for barely touching Marcus Smart on a jumper and then was called for a charge.
Irving had led a 17-point swing in the quarter.
Irving scored 12 points in the quarter with James on the bench to save Cleveland from a blowout.
Hours after the Magic formally announced Tuesday morning they had hired Weltman, he named longtime National Basketball Association executive John Hammond as the club's new general manager.
There were two firsts in last night's Eastern Conference championship game. It was reported Monday night that Weltman and the Magic had agreed to a deal.
The last pick in the 2011 NBA Draft, Thomas has emerged as an All-Star in Boston.
Then, after stealing a pass from Celtics forward Jonas Jerebko, James got space in the lane after a post-up and threw down a right-handed dunk that put the Cavaliers up, 28-12, and forced another Boston timeout.
Thomas, who is done for the season with a right hip injury he sustained in March and aggravated in the playoffs, told Celtics coach Brad Stevens that he intends to get "one or two more opinions" before a course of action is set.
The wall is in the Old City, a part of east Jerusalem , which the US and most of the world consider to be occupied territory. Trump said as a candidate he would move the embassy to Jerusalem , but now says he's studying the issue.
Terry experienced his first FA Cup final as an unused substitute in Chelsea's win over Aston Villa in 2000. This aspect I can stay calm and I trust the players, it is impossible not to after this season .
More than two thirds, 68 percent, said that Russian interference in the election is "very important" or "somewhat important". According to the survey, the president's job approval rating declined to 45 percent now from 49 percent in March.
There were other complications with the one-page special session agreement hurriedly drafted Monday among the state's top leaders. On Wednesday, the House approved bills for taxes, education and transportation, with senators doing the same with taxes.
Trump has called the investigation of his presidential campaign's ties with Russian Federation a "witch hunt". The paper said the comments came from the White House's written account of the Oval Office meeting.
The awkwardness may stem from Trump's tacit support of Macron's rival Marine Le Pen during the French election. President Macron said he respected President Trump's decision to put the Paris agreements under review.
Showing all of his class and experience, Oracle skipper Jimmy Spithill refused to give in and gradually clawed his way back. Crewmen on SoftBank Team Japan had to leap clear of Ainslie's port hull as it crashed onto their starboard hull.
The previous year, many students and teachers said that components of the JEE (Advanced) were particularly challenging. The paper contained a mix of single choice, multiple correct choice and passage type single choice question.
Short is Exeter's top try-scorer this season, scoring 11 tries in the Premiership and going over 14 times in all competitions. The game also marked England worldwide Danny Cipriani's return to Wasps after he rejoined from Sale Sharks over the summer.
Later on Sunday, Secretary of State Rex Tillerson told Fox News that North Korea nuclear testing was "disappointing, disturbing". South Korea says it has fired warning shots at an object that flew across the demilitarised zone from North Korea .
LeBron James breaks Michael Jordan's playoff scoring record
In light of that need for roster enhancement, this could have been the last parquet party for a fair number of those in uniform. The deficit reached a peak of 37 points, the second worst under Brad Stevens to the 50-point lead the Cavs reached in Game 2.
4 militants killed in Rampur sector: Army
Indian army Tuesday claimed it had damaged some Pakistani army posts on LoC and described it as "punitive fire assaults". Two groups of terrorists managed to cross the LoC even during winter when the mountain passes were covered with snow.
Steven Mnuchin at G7: 'We don't want to be protectionist'
Another senior official from the delegation said, "Each one of us is following developments in USA tax policy very closely". The aim for the G7 and central bankers on Saturday is to join forces to fight the growing threat of worldwide cyber attacks.
Wenger seeks solace in quest for seventh FA Cup
A game of football or a concert is a moment that you must live with passion and enthusiasm. "I just want to enjoy my football". He can think what he wants. "For this reason, I hope to see a great game and all my players trying to win for us", Conte said.
Next stop for Trump is Israel, in pursuit of 'ultimate deal'
Trump is expected to become the first sitting U.S. president to visit the Western Wall , the holiest site where Jews can pray. His nine-day trip through the Middle East and Europe ends on Saturday after visits to the Vatican, Brussels and Sicily.
A Warm Memorial Day Weekend, Could See Some Rain
MEMORIAL DAY MONDAY: Partly cloudy skies will develop for Memorial Day Monday, with a high temperature of 79 degrees. New rainfall amounts between a tenth and quarter of an inch, except for higher amounts possible in thunderstorms.
British police say military to guard key London sites
Sixty-four people are still hospitalized, Jon Rouse of the Greater Manchester Health and Social Care Partnership said Wednesday. France, which has repeatedly been hit by devastating militant attacks since 2015, extended emergency powers.