The Dallas Mavericks have parted ways with Johann Bilsborough, their director of health and performance, following a disappointing 2025-26 NBA season marred by injuries. This marks the fourth consecutive year of major changes in the team's health department. Bilsborough, who spent two challenging seasons with the Mavericks, was brought in by former general manager Nico Harrison after the dismissal of Casey Smith, who had a long tenure with the franchise. The decision to let Bilsborough go is part of the Mavericks' desire for a fresh perspective in their health and performance strategies, especially after failing to reach the playoffs for the second straight year. The team is expected to hire a new director of health and performance once the new lead basketball operations executive is appointed, with hopes of making that hire by mid-May. Bilsborough's tenure included conflicts with other staff, notably with former athletic performance director Keith Belton, who also faced dismissal after a contentious incident involving player Dereck Lively II's recovery process.