After less than three months on the job, Dallas Mavericks general manager Gersson Rosas resigned on the eve of the team's season opener.
Rosas, 35, was hired away from the Houston Rockets' front office on Aug. 1.
According to multiple media reports, Rosas was rebuffed in his efforts to put his imprint on personnel matters. The team's director of basketball operations, Donnie Nelson, reportedly continued to have the final say.
"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 in a statement released by the team. "The decision was made solely by me, as I firmly believe this change is in my best interest.
"(Team owner) Mark Cuban asked me to reconsider my decision, but graciously accepted my decision and we part as friends. I would like to thank Mark and the Dallas Mavericks for the opportunity."
Cuban wrote in a statement, "I was disappointed when Gersson told me of his decision, but I understand and all of us wish him the best."
During his nine-year stint in the Rockets organization, Rosas served as general manager of the team's Rio Grande Valley Vipers affiliate in the NBA Development League, and last season he was Houston's player personnel director.
The Mavericks open the season Wednesday with a home game against the Atlanta Hawks.
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