A coroner has ruled that Chicago Bears defensive end Gaines Adams died of a heart attack, according to ESPN's Adam Schefter's posting on his Twitter account.
Adams, 26, was pronounced dead at 9 a.m. Sunday at a Greenwood County, South Carolina hospital, according to the Greenville News.
Selected as the fourth overall pick in the 2007 NFL Draft, Adams joined the Tampa Bay Buccaneers.
Apparently Adams had an enlarged heart that caused cardiac arrest, according to tweets posted at Schefter and Jason La Canfora's Twitter pages. On Thursday, Southern Indiana senior Jeron Lewis also had an enlarged heart, like Adams, that led to his cardiac arrest during a basketball game at Kentucky Weslyn College.
Adams, who played football at Clemson, was considered by many to be a bust at the NFL level and was traded from the Bucs to the Bears last October.
The former 2006 ACC Defensive Player of the Year registered 93 tackles, 13 1/2 sacks and two interceptions in four seasons (three with Tampa Bay, one with Chicago).
In his final season with the Bears, Adams played in 10 games and collected seven tackles, one pass defended and one forced fumble.
Adams is the second NFL player to pass away this season. Cincinnati Bengals wideout Chris Henry died on Dec. 17 following a fall from a moving pickup truck, which was driven by his fiance who he was having an argument with prior to the accident.