Longtime Dallas Mavericks president of basketball operations Donnie Nelson is out after 24 seasons with the franchise, the team announced Wednesday.
Nelson's departure comes after internal friction due to the increasing decision-making influence of Mavericks director of quantitative research and development Haralabos Voulgaris, sources told ESPN.
Voulgaris, a former professional gambler hired by the Mavs in 2018, has reported directly to owner Mark Cuban and communicated directly with coach Rick Carlisle despite Nelson's objections, sources said.
The decision for Nelson to leave the franchise was made Sunday, sources said.
Nelson worked for the Mavericks for 24 seasons, serving as an assistant general manager and assistant coach before being promoted to president of basketball operations.