Overview

• The Dallas Mavericks have dismissed head athletic trainer Dionne Calhoun after 21 seasons and performance director Keith Belton, marking the third consecutive offseason of health staff changes.
• Belton, hired last year, lacked the National Strength and Conditioning Association certifications required by the NBA’s collective bargaining agreement.
• An internal HR investigation revealed tensions between Belton and health director Johann Bilsborough, stemming from a dispute over the treatment of center Dereck Lively II, who suffered a stress fracture after an intense workout.
• The dismissals follow a 39-43 season marred by injuries to key players, including Anthony Davis and Kyrie Irving, and a play-in game elimination.
• This staff overhaul reflects broader organizational challenges under GM Nico Harrison, whose leadership has faced scrutiny after the controversial Luka Dončić trade.