Chicago Bears defensive end Gaines Adams died Sunday morning after he was taken to a Greenwood, S.C., emergency room, the county coroner said.

Greenwood County Coroner James T. Coursey told ESPN that Adams was taken to the emergency room at Self Regional Hospital, where he was pronounced dead at 9 a.m. ET Sunday morning.

An autopsy will be performed Sunday by the Anderson County forensic pathologist, Coursey said.

Adams, 26, listed at 6-foot-5 and 256 pounds, played in college at Clemson and was drafted by the Tampa Bay Buccaneers with the No. 4 overall pick in the 2007 NFL draft. He was traded to the Bears in October.

In 47 games over four seasons with the Bucs and Bears, Adams had 67 tackles, including 13.5 sacks.