George Atkinson III, a former NFL player and college football standout, has died, according to multiple reports. He was 27.

There was no cause of death announced for Atkinson III. The Athletic reported Tuesday that he was battling with depression since the death of his twin brother Josh Atkinson – who died by suicide about a year ago. Both were sons of Pro Bowl defensive back George Atkinson II, who played for the Oakland Raiders and Denver Broncos over the course of his NFL career.

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George Atkinson III and Josh Atkinson were a part of Notre Dame’s 2011 recruiting class. Atkinson III was primarily a running back for the Fighting Irish from 2011 to 2013. He rushed for 943 yards and 10 touchdowns in his college career. Josh Atkinson was a defensive back during the same time. He recorded 10 total tackles and appeared in more than a dozen games for the Fighting Irish.

Atkinson III went on to play in the NFL. He played with the Raiders in 2014 and the Cleveland Browns in 2016.

Running back George Atkinson III #25 of the Cleveland Browns walks off the field after the first OTA practice on May 24, 2017 at the Cleveland Browns training facility in Berea, Ohio. (Nick Cammett/Diamond Images/Getty Images)

Running back George Atkinson III #25 of the Cleveland Browns walks off the field after the first OTA practice on May 24, 2017 at the Cleveland Browns training facility in Berea, Ohio. (Nick Cammett/Diamond Images/Getty Images)

The brothers had a rough family upbringing. Atkinson III detailed their family life in an open letter published on TheUnsealed.com after his brother’s death. He revealed that his mother self-medicated with crack and that they would move around a lot because she wouldn’t be able to pay rent.

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The brothers lived with their mother until they were 13 when their father took custody of them.

Atkinson III detailed his struggles with his mental health but said he wouldn’t be around without his young daughter.

“Without my daughter, I don’t know where I would be right now. She gave me that second wind of motivation,” he wrote.

“I went to seek help and spoke to a psychologist. I realized I had to let go of this ego that made me think sharing my feelings was showing weakness. Also, I had to learn to love myself.

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“Like you, I am still struggling. My mother’s birthday just passed and I know the holidays this year won’t be easy. But I am trying to take life one day at a time.”