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Mavericks part ways with recently hired GM Gersson Rosas

(Danny Bollinger/Getty Images) Mark Cuban (left) and the Mavericks won the 2011 title. (Danny Bollinger/Getty Images)

The Mavericks announced Tuesday that GM Gersson Rosas was leaving the organization roughly three months after he was hired.

“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. “The decision was made solely by me, as I firmly believe this change is in my best interest.”

Rosas' departure was first reported by ESPN.com and CBSSports.com.

Hired by owner Mark Cuban in July, Rosas had reported to president Donnie Nelson, who initially recommended him for the position.

The Associated Press reported that Cuban sought out Rosas, who worked as a front-office executive for the Rockets, because he was looking for someone with "brainpower, organizational management and process power" to complement Cuban's vision and Nelson's player evaluation abilities.

“I was disappointed when Gersson told me of his decision, but I understand and all of us wish him the best,” Cuban said in a statement Tuesday.

Rosas, 35, spent nine years with the Rockets, rising from video coordinator to scout to GM of the Rio Grande Valley Vipers, the organization's D-League affiliate. He was promoted to VP of basketball operations in 2012.

The cause or causes of Rosas' departure are not entirely clear, and his short tenure is unusual both by general NBA standards and in comparison to the Mavericks' recent history. Dallas has been a relatively stable ship under Cuban, who took over as owner in 2000. Nelson has worked in Dallas since 1998 and coach Rick Carlisle was hired in 2008, making him one of the longest-tenured coaches in the league. Together, that trio constructed and guided the Mavericks to the 2011 title, and the organization's front office had operated under Nelson -- and without a GM -- for the better part of a decade.

It's difficult to imagine that any particular transaction would have played a role in this parting. By the time Rosas was hired, Dallas was already deep into its offseason moves. Jose Calderon was signed before Rosas was hired and Monta Ellis was inked the day after Rosas' hiring was announced. The re-signing of Brandan Wright to a two-year, $10 million deal, the signing of first-round pick Shane Larkin and the signing of Devin Harris and DeJuan Blair to minimum contracts were the only transactions of note conducted after Rosas joined the Mavericks. All of those moves -- save Blair -- were executed within one week of Rosas' hiring. Presumably, they were all in the works well in advance of Rosas' arrival.

Rockets GM Daryl Morey lauded Rosas in an August press release congratulating his former assistant on his new job.

“I always knew this day would come as Gersson has been the key to our success on player evaluation for many years now and an integral part of getting us back to contender status," Morey said. "This a great hire for the Dallas Mavericks, I really wish he was going to a different team than our Southwest rivals. Most folks may not know, but in addition to all his efforts with the Rockets, Gersson captured two D-League championships and reached the D-League Finals in three of his four seasons as the General Manager for the Rio Grande Valley Vipers.”

Dallas plays host to Atlanta in its regular-season opener Wednesday. Last season, the Mavericks missed the playoffs for the first time since 2000.
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