(NewsNation) — Dallas Cowboys defensive end Marshawn Kneeland has died, the team announced Thursday.

He was 24. No cause of death has been released.

"Marshawn was a beloved teammate and member of our organization. Our thoughts and prayers regarding Marshawn are with his girlfriend Catalina and his family," the Cowboys said in a statement.

Kneeland's agent, Jonathan Perzley, said he died on Wednesday night.

"I watched him fight his way from a hopeful kid at Western Michigan with a dream to being a respected professional for the Dallas Cowboys. Marshawn poured his heart into every snap, every practice, and every moment on the field," Perzley said.

The NFL is in contact with the Cowboys and is offering counseling resources to his teammates and coaches, the league said in a statement.

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