The 10-time NBA All-Star guard has been in a dispute with the 76ers and, as a result, has missed their first three games of the NBA season.
The terms of the trade see Harden joined in Los Angeles by 76ers team-mates P.J. Tucker and Filip Petrusev, while Clippers players Marcus Morris, Nico Batum, Robert Covington and K.J. Martin switch to Philadelphia.
Clippers president Lawrence Frank said: “James is one of the most prolific and efficient playmakers in the NBA.
“With his size and vision, he possesses an extraordinary ability to create for himself and others.
“The Los Angeles area has produced so many elite players in recent years. With Kawhi (Leonard), Paul (George), Russ (Westbrook) and James, we’re excited to bring four of them together, and eager to see what they can accomplish with the rest of our group.”
The Clippers are currently fourth in the Western Conference after winning three of their opening four games.
Donovan Mitchell top scored with 23 points, while three players – Joe Ingles, Jordan Clarkson and Georges Niang – came off the bench to post 20 points or more to send the Jazz to 25-6.
Ingles and Niang each shot seven from downtown, while Clarkson added five.
Utah became the fastest team in NBA history to record 500 three-pointers in a season, setting the record at 31 games.
Led by two-time reigning MVP Giannis Antetokounmpo, the Bucks are in championship mode after losing in the semi-finals last season, having fallen in the Conference Finals in 2018-19.
The Bucks are fortifying their postseason push by sending D.J. Augustin and D.J. Wilson to the struggling Rockets for Tucker and Rodions Kurucs, according to ESPN.
Milwaukee and Houston are also reportedly redirecting draft picks as part of the deal.
Tucker has been on the outer in Houston, where he and the Rockets agreed for the veteran to stay away from the team until a trade could be found.
The 35-year-old will bring playoff experience to the Bucks, having spent four years with the Rockets, which included a trip to the Western Conference Finals and back-to-back semi-final appearances.
Tucker has struggled in 2020-21, averaging career lows for points (4.4), field goal percentage (36.6) and three-point percentage (31.4) amid Houston's woes.
Meanwhile, the Miami Heat traded Meyers Leonard and a 2027 second-round pick to the Oklahoma City Thunder for Trevor Ariza.
Leonard – a part of Miami's run to last season's NBA Finals – will not be reporting to Oklahoma City and will not be an active member of the organisation, the Thunder said in a statement.
It comes after Leonard, who suffered a season-ending shoulder injury in February – was fined $50,000 by the NBA for an anti-Semitic slur last week.
Ariza – an NBA champion in 2009 – lands in Miami, having not played a game in a year after the 35-year-old opted out of the Orlando bubble amid the coronavirus pandemic in 2019-20.
The league is interested in the circumstances surrounding Harden declining his $47million player option to sign a two-year, $68m contract that includes a player option for the second year of the deal.
Questions have been raised about whether there was a handshake agreement in place on a future contract – which would be in violation of collective bargaining rules.
Harden’s decision to decline his option gave Philadelphia more flexibility to sign Tucker and House.
"Taking less money this year to sign as many players as we needed to help us contend and be the last team standing was very, very important to me," Harden said in an interview this month. "I wanted to show the organisation, the Sixers fans and everybody else who supports what we're trying to accomplish, what I'm trying to accomplish individually, that this is what I'm about."
Tucker signed a three-year, $30m contract, and House signed for $8.4m over two years. The 76ers were able to sign Tucker to the full mid-level exception and sign House to the bi-annual exception only because Harden declined his option.
According to the report, 76ers president of basketball operations Daryl Morey has already begun answering questions from league attorneys.
With tampering often a potential issue, the NBA approved stiffer penalties in 2019 and stripped a draft pick from the Chicago Bulls for early contact with Lonzo Ball in 2019, and the Miami Heat for doing the same with Kyle Lowry last summer.
The Bucks came out on top 115-111 in Game 7 against the Brooklyn Nets, albeit only after a dramatic finish in the fourth quarter that saw them escape by a matter of inches.
Durant hit a stunning turnaround jumper with one second remaining to tie the scores at 109-109, with Milwaukee relieved to see he had a foot on the three-point line as they narrowly avoided falling behind.
"Big, big shot," Antetokounmpo told the media about Durant's play that forced overtime. "That's KD – he makes shots like that."
However, the Nets were held to just two points in the extra period as the Bucks came through on the road, setting up a showdown with either the Philadelphia 76ers or the Atlanta Hawks – who meet in a Game 7 on Sunday – for a place in the NBA Finals.
Defeat was tough on Durant, who finished with 48 points – the most by any player in a Game 7 in NBA history – as he was on court for all 53 minutes. He went 0-for-6 in overtime, though, as the ailing Nets, minus the injured Kyrie Irving and with James Harden not at full fitness due to a hamstring issue, saw their season come to an end.
For the Bucks, however, the focus will have to quickly switch to their next assignment.
"We really wanted this as a team," said Antetokounmpo, who had 40 points and 13 rebounds.
"There were a lot of ups and downs during the series – there were a lot of ups and downs in just this game. We could have finished the game before overtime but weren't able to. We kept our composure."
He added: "At the end of the day, though, the job is not done. The job is not done. That's the message here and in the locker room, we’ve got to keep our heads in the game.
"We can't get too high, we can't get too low. It's a great step for our organisation and a great step for us, so we have got to enjoy this moment and then look at our next opponent.
"We've got to put this in the past and focus on the moment, focus on our next opponent."
Durant's performance drew praise from Stephen Curry, who simply tweeted at his former Golden State Warriors team-mate after the fourth-quarter shot: "That is insane."
Even P.J. Tucker – the player who attempted to cover Durant on the play – was suitably impressed.
"When I cut him off, I thought he would one-foot it, or step back. When he spun, he threw me off. That shot was incredible," Tucker said. "People don't really appreciate the level of difficulty with that shot, it was incredible.
"I laughed, I just laughed when he made it. I appreciated it, as a fan of the game, when someone makes that shot."
Durant was one of just 11 different players to score, the fewest in any regular season or postseason game since the merger.
The Clippers are acquiring Harden and Tucker in a blockbuster trade with the Philadelphia 76ers.
Filip Petrusev is also joining the Clippers, with Marcus Morris, Robert Covington, Nic Batum and KJ Martin heading the other way.
Harden, who was in attendance as the Clippers beat the Orlando Magic on Tuesday, had been in a dispute with the 76ers, and missed their opening game of the season – a loss to the Milwaukee Bucks – and their second fixture, a win over the Toronto Raptors.
The 10-time All-Star played alongside both Tucker and Westbrook at the Houston Rockets, and the latter, who refused to confirm the trade before it was made official, could not hide his delight.
"Right now, James and P.J. are off-limits. I got nothing for you until it's official," Westbrook smiled, as per ESPN.
Asked if he was happy, Westbrook said: "Yeah. I mean, s***, why wouldn't I be?
"Yeah, excuse my language, but definitely, definitely happy."
As for the Sixers, Tyrese Maxey is set to inherit the point forward role Harden occupied in the roster.
"I think our group has been prepared," Maxey said. "I think we've done a good job of keeping the main thing the main thing, and I think that's what's gotten us all to a solid start.
"We have some really good guys that are focused, that are determined to go out there and play and show what we can do, and [a] coach that's keeping our mind in the right place."
Maxey also had a special word of thanks for his former teammate.
"I texted him and I told him I love him, told him I appreciate him," Maxey added of Harden. "One thing that he really installed in me is confidence. I've always been a confident person, but he made me be even more confident than I already was, and all I can do is appreciate him for that.
"He took me under his wing, taught me a lot of things as far as just being a professional in this league and how things go. So I appreciate him and I love him. Same thing with Tuck. Love those guys."
Philadelphia coach Nick Nurse, meanwhile, seems ready to move on from the Harden drama.
"I got to get ready for Thursday, and I got to coach the guys we got," he told reporters.
"I really like where we are right now. I mean, there's so much I'm learning about this group. I think there's so much improvement we have to make in a lot of ways, and I'll let Daryl and [76ers general manager Elton Brand] and the boys worry about all that stuff, and I'll coach the guys here on a daily basis."
