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Former NFL linebacker Keith Mitchell has died, it was announced Thursday. He was just 51 years old.

Details surrounding his death have not been disclosed.

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Mitchell was a star linebacker at Texas A&M … and was named an All-American in 1996. His total sack count during his time at College Station put him toward the top all-time in organization history.

After going undrafted due to size concerns in 1997, he joined the New Orleans Saints … where he played until 2001.

As a result of his success on the gridiron, Mitchell earned a Pro Bowl selection in 2000.

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In total, Mitchell had 286 solo tackles, 19.5 sacks, and four interceptions for the Saints, Houston Texans, and Jacksonville Jaguars.

He suffered a spinal injury during a game in 2003 … and it not only ended his time in the NFL, but it also jeopardized his mobility — but he ultimately overcame the ailment.

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Following his playing career, Mitchell shifted to wellness and yoga … and released a book called “The Mindfulness Mastery Playbook” late last year.

He credited yoga and meditation with saving his life … and traveled the world sharing his expertise.

KBTX was first to report the news of Mitchell’s death.