Gersson Rosas resigned as Mavericks General Manager before his first season with them could get started.
Rosas stepped down on Tuesday.
"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 release from the Mavericks. "The decision was made solely by me, as I firmly believe this change is in my best interest.
“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.”
“I was disappointed when Gersson told me of his decision, but I understand and all of us wish him the best,” Cuban said.
Rosas was hired by the Mavericks this past offseason after rising up in the Rockets organization. He began with the Rockets as a video coordinator and a scout before eventually rising to VP of basketball operations, as well as general manager of the Rio Grande Valley Vipers of the NBA's D-League.