The Dallas Mavericks have fired General Manager Nico Harrison after a disappointing record of 3-9 in the 2025-26 NBA season.Owner Patrick Dumont confirmed the decision amid fan backlash over a controversial trade that sent star player Luka Dončić to the Los Angeles Lakers for Anthony Davis and Kyrie Irving.Co-interim general managers Michael Finley and Matt Riccardi now take charge to improve the team's performance and fan engagement while addressing concerns over their roster and recent trades.