FRISCO, Texas -- Dallas Cowboys defensive end Marshawn Kneeland died Thursday morning, the team announced.

"It is with extreme sadness that the Dallas Cowboys share that Marshawn Kneeland tragically passed away this morning. 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 team said in a statement.

He was 24.

The team did not disclose any details about how Kneeland died.

Kneeland's agent, Jonathan Perzley, described Kneeland's death as "a pain I can hardly put into words."

"I am shattered to confirm that my client and dearest friend Marshawn Kneeland passed away last night," Perzley said in a statement. "I watched him fight his way from a hopeful kid at Western Michigan

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