Chicago Bears defensive end Gaines Adams died on Sunday of a cardiac arrest caused by an enlarged heart, a South Carolina coroner said.
Greenwood County coroner Jim Coursey said Adams was taken to the emergency room at Self Regional Hospital, where he was pronounced dead on Sunday morning.
Adams was experiencing 'health issues' and his girlfriend called for an ambulance, Coursey said.
Adams, who died at the age of 26, played college football at Clemson University and was drafted by the Tampa Bay Buccaneers in 2007.
He was traded to the Chicago Bears in October last year and featured in 10 games for the team this season.