Mavs GM Nico Harrison helped the team reach the 2024 NBA Finals.

The Dallas Mavericks announced GM Nico Harrison has been relieved of his duties as general manager, team governor Patrick Dumont said Tuesday.

The Mavs have appointed Michael Finley and Matt Riccardi as co-interim general managers as the team will begin a “comprehensive search” for a permanent replacement.

The Mavs hired Harrison in 2021, announcing his addition to the team on the same day they announced the hiring of coach Jason Kidd. Harrison oversaw the team and its rise behind its then-star, Luka Dončić, as the Mavs made the NBA Finals in 2024. Dallas lost the series 4-1, but seemingly had a bright future with Dončić and other key players in tow.

However, Harrison and the Mavs stunned the NBA world last season when Dončić was dealt to the Los Angeles Lakers in a blockbuster, three-team trade in early February.

Harrison later said he miscalculated the depth of love his club’s fans had for Dončić before the trade that sent the young superstar to the Lakers for Anthony Davis. But despite the persistent catcalls from fans for him to be fired in the months since the deal, Harrison said he believed that trade was the right move for building a championship contender in Dallas.

“I did know that Luka was important to the fan base,” Harrison said during his season-ending news conference in late April. “I didn’t quite know it to what level.”

Dallas secured the No. 1 pick in the 2025 NBA Draft and selected Cooper Flagg, who is a key piece of the Mavs’ core along with Davis, Dereck Lively II and injured star guard Kyrie Irving.

Harrison spent 19 years in Nike’s basketball division, and before his time with Dallas was vice president of North American operations. He worked closely with many of the brand’s stars, including the late Kobe Bryant and Michael Jordan.

After a year at Army, Harrison played his final three seasons at Montana State before a seven-year pro career in Belgium. He went to work for Nike after his playing career ended.

Information from The Associated Press was used in this report.