Mavericks general manager Nico Harrison is making significant changes to the team’s health and performance group, according to a person with knowledge of the moves. Among them, head athletic trainer Dionne Calhoun and athletic performance director Keith Belton have been relieved of their roles.

Nico Harrison just cannot get out of his own way. The general manager of the Dallas Mavericks has had a rough 2025, mostly his own fault, which started when he traded away Luka Doncic, a beloved figure within Dallas,

Harrison didn’t receive a single third-place vote. Lakers GM Rob Pelinka, on the other hand, earned one first-place vote, one second-place vote, and three third-place votes, finishing sixth overall with 11 points.