Gersson Rosas parted ways with the Mavericks on Tuesday, barely three months after the team hired him as its general manager.
Rosas, who'd been part of a talented group of front office executives to leave the Rockets in recent months, issued a statement through the team Tuesday night, saying the decision to leave was made solely by him.
“I made the personal decision to resign as general manager of the Dallas Mavericks after determining that the position was not the best fit for me at this point in my career,” Rosas said. “The decision was made solely by me, as I firmly believe this change is in my best interest.”
Rosas said owner Mark Cuban asked him to reconsider, but ultimately accepted his resignation.
"We part as friends," Rosas said.
“I was disappointed when Gersson told me of his decision, but I understand and all of us wish him the best,” Cuban said.
Rosas, 35, had been added to an established front office led by longtime president Donnie Nelson, Keith Grant and former Pistons and Timberwolves executive Tony Ronzone. Owner Mark Cuban had been sold on the notion that Rosas could lead the basketball operations department in a new direction geared toward advanced stats and analytics, the hallmark of the successful Houston front office that Rosas left in July.
According to multiple league sources, Rosas' efforts to map a new course for a team that has made the playoffs in 12 of the past 13 seasons -- including two Finals appearances and a championship -- was met with strong resistance.
"It didn't fit from the beginning," one of the sources said. "The chemistry was simply not there."
Also in the past year, Sam Hinkie left the Rockets to become GM of the 76ers, and Houston's former international scouting director, Arturas Karnisovas, left to become assistant GM in Denver.