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Bears DE Gaines Adams, 26, died this morning after being taken to a hospital in Greenwood, SC County Coroner James T. Coursey confirmed. Cause of death is not yet known.

Adams was drafted No. 4 overall by the Tampa Bay Buccaneers in 2007. He was traded from Tampa Bay to the Chicago Bears in October. Adams played collegiately at Clemson.

An autopsy will be performed today by a forensic pathologist in Anderson County, Coursey said. Adams was pronounced dead at 9 a.m. Sunday.