Gaines Adams
Gaines Adams was originally drafted by the Tampa Bay Buccaneers with the fourth overall pick in the 2007 NFL Draft. In 2009, the Buccaneers traded the defensive end to the Chicago Bears.
Just months after he was traded to the Bears, the 26-year-old went into cardiac arrest at his home in South Carolina.
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His girlfriend called 911 and he was taken to a local hospital for treatment. He, unfortunately, died a short time later. Doctors said that Adams' cardiac arrest was caused by an enlarged heart.
Cyrus Jones
Former Alabama cornerback Cyrus Jones' situation is a bit different than the others. He too had played football for many years including three in the NFL. He never experienced any issues until doctors discovered a congenital coronary defect in his heart. This was shortly after being released by the Baltimore Ravens in 2019.
He underwent open-heart surgery in fall of 2020. He has no side effects of the condition or the surgery. He had hoped to return to the National Football League but hasn't played since 2019.