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.

The Brooklyn Nets have added another All-Star to the mix, agreeing to a deal with veteran forward Paul Millsap. 

Millsap's agent DeAngelo Simmons confirmed the move to The Athletic and other outlets, and the player posted an image of himself in a Brooklyn uniform on his Instagram page on Thursday. 

The 36-year-old Millsap is entering his 16th NBA season, spending the first seven years of his career with the Utah Jazz before four seasons each with the Atlanta Hawks and the Denver Nuggets.

His best years came in Atlanta, where he made the All-Star team all four seasons. 

Millsap's playing time steadily diminished in Denver last season as he lost his starting job and ended up averaging just 20.8 minutes and 9.0 points per game – his lowest since his second year in the league. 

At this stage of his career, Millsap will be a complementary player on a loaded Brooklyn team that also features Kevin Durant, James Harden, Kyrie Irving and Blake Griffin. 

He effectively steps into the role vacated by fellow veteran Jeff Green, who averaged 11 points in 27 minutes for Brooklyn last season before signing a two-year deal with the Nuggets last month. 

Joining the star-studded Nets squad gives Millsap a strong chance to make the NBA Finals for the first time in his career. He has been on teams that reached the conference finals three times, but his team never won more than one game in any of those series. 

Potentially finishing his career with a contender was a priority for Millsap, as The Athletic reports he also considered the Los Angeles Clippers, Golden State Warriors and Chicago Bulls.