The Philadelphia 76ers solved their Ben Simmons conundrum with a blockbuster trade for James Harden of the Brooklyn Nets before the NBA trade deadline passed on Thursday. 

Simmons has refused to play for the Sixers this season after coach Doc Rivers and center Joel Embiid were critical of his performances in the Eastern Conference semifinals loss to the Atlanta Hawks last season. 

Philadelphia had been trying to trade the fifth-year guard/forward ever since, but the former Rookie of the Year's value plummeted after he came up short against the Hawks. 

However, according to multiple reports a deal was finally struck to send Simmons to Brooklyn in exchange for the 2018 NBA MVP Harden. Seth Curry, Andre Drummond, an unprotected 2022 first-round pick and a protected 2027 first-round pick were also sent to the Nets, with Paul Millsap going in the opposite direction. 

Harden can become a free agent in the offseason, while Simmons is under contract until 2025 after signing a five-year, $177.2million deal in 2019.

While the 76ers seemingly boosted their chances of contending by adding Harden, the Los Angeles Lakers and Golden State Warriors remained idle. However, there were still plenty of other deals reported on Thursday.

Mavericks move on from Porzingis

The Luka Doncic-Kristaps Porzingis era is over in Dallas.

The Mavs sent Porzingis and a second-round pick to the Washington Wizards in exchange for Spencer Dinwiddie and Davis Bertans.

Injuries have continued to trouble the 7ft 3in center, who averaged 20 points and 8.8 rebounds per game in two and a half seasons in Dallas.

Kings trade Bagley, Bucks get Ibaka 

The Sacramento Kings made Marvin Bagley III the second overall pick in the 2018 draft but brought an end to his time in California as part of a seven-player, four-team trade. 

Bagley was sent to the Detroit Pistons, with Josh Jackson and Trey Lyles going to Sacramento. The Kings also received Donte DiVincenzo from the Milwaukee Bucks, who swapped Serge Ibaka for Semi Ojeleye and Rodney Hood. The reigning NBA champions also received two future second-round picks and cash considerations. 

Bagley has started just 17 games for Sacramento this season, averaging 9.3 points and 7.2 rebounds in 21.9 minutes per game.

Celtics bring Theis back, send Schroder to Houston

Daniel Theis is back for a second spell with the Boston Celtics.

Less than a year after he was traded to the Chicago Bulls by the Celtics, Theis was brought back from the Houston Rockets in exchange for Dennis Schroder, Enes Freedom and Bruno Fernando. Freedom is expected to be waived by the Rockets, though.

Boston also sent Bol Bol and PJ Dozier, who are both out for the season, to the Orlando Magic and offloaded Josh Richardson and Romeo Langford to the San Antonio Spurs. The Celtics' brought in Derrick White.

Elsewhere...

Goran Dragic's time with the Toronto Raptors is up after he was traded to the Spurs for Thaddeus Young, Drew Eubanks – whom they were set to waive – and a 2022 lottery-protected first-round pick. Dragic is expected to be bought out, with the Chicago Bulls, Mavs, Bucks, Warriors, Nets and Clippers all credited with an interest.

The Charlotte Hornets added Montrezl Harrel from the Wizards. Ish Smith and Vernon Carey Jr went the other way. 

Torrey Craig is back with the Phoenix Suns following a deal that saw Jalen Smith land with the Indiana Pacers. Aaron Holiday was also acquired from the Wizards.

A four-team trade deal between the Detroit Pistons, the Los Angeles Clippers, the Milwaukee Bucks and the Sacramento Kings will include Marvin Bagley III heading to the Pistons and Serge Ibaka being picked up by the Bucks, according to reports.

Donte DiVincenzo is among the players heading to the Kings, while the Clippers receive Rodney Hood and Semi Ojeleye from Milwaukee.

Bagley, who was the second overall pick in the 2018 NBA Draft, averaged 13.5 points and 7.4 rebounds with the Kings having faced numerous injuries and struggled to fully establish himself in Sacramento.

Ibaka will join the Bucks as the NBA champions add someone with Finals experience from his time at the Toronto Raptors and Oklahoma City Thunder. The 32-year-old averages 6.6 points and 4.3 rebounds in 35 games this season.

The Bucks also receive two future second-round draft picks as well as cash considerations.

Sacramento, who only added Domantas Sabonis in a trade with Indiana on Tuesday, procured DiVincenzo from Milwaukee, as well as Josh Jackson and Trey Lyles from Detroit.

DiVincenzo has an average of 7.2 points, 3.5 rebounds and 1.7 assists in his 17 games so far this season, while Lyles is currently enjoying a career-best average of 10.4 points this year.

Hood and Ojeleye bolster the Clippers' depth having only featured from the bench this season for Milwaukee.

Phoenix Suns star and former number one draft pick Deandre Ayton was among a number of players who did not sign rookie contract extensions before the deadline.

Monday was the deadline for the 2018 draft class to pen new deals with their respective teams in the NBA.

Malcolm Brogdon of the Indiana Pacers (two-year, $45million), Memphis Grizzlies star Jaren Jackson Jr. (four year, $105m), Kevin Huerter of the Atlanta Hawks (four-year, $65m), Suns guard Landry Shamet (four-year, $43m) and the Milwaukee Bucks' Grayson Allen (two-year, $20m) all extended their contracts.

However, there were some notable names missing, including Ayton – who can enter restricted free agency next year, according to ESPN and Adrian Wojnarowski.

Ayton played a key role in Phoenix's run to the NBA Finals last season, however, the Suns did not come to the table as the 23-year-old center eyed a five-year max contract.

In 2020-21, Ayton averaged 14.4 points, 10.5 rebounds and 1.4 assists per game, while he boasted a career-best 62.6 field-goal percentage and career-high 76.9 percentage from the free-throw line.

Ayton's numbers elevated in his first playoff campaign – 15.8 points and 11.8 rebounds per game, though his future in Phoenix is now uncertain.

Cleveland Cavaliers star Collin Sexton also failed to reach a contract extension agreement with the Eastern Conference strugglers.

Sexton did not land a new deal, despite career highs in points (24.3), assists (4.4), rebounds (3.1) and field-goal percentage (47.5).

The other players without contract extensions are Miles Brides of the Charlotte Hornets, the Orlando Magic's Mo Bamba, Marvin Bagley III of the Sacramento Kings and New York Knicks forward Kevin Knox.