Detroit Lions camp: Kerby Joseph injury and Derrick Moore's rookie role

The Detroit Lions kicked off their 2026 preseason with an intensive training camp, accelerating roster battles. Kerby Joseph is undergoing an accelerated rehab program for his knee injury, with weekly medical updates guiding his return timeline.

Rookie defensive end Derrick Moore is poised to assume first‑year responsibilities, as coaches evaluate his pass‑rush and run‑stop abilities. Both storylines will directly influence the Lions' defensive depth and preseason performance.