An autopsy has revealed that former Portland center Kevin Duckworth died when his enlarged heart failed, the Associated Press is reporting.

Duckworth died Monday at the age of 44 on the Oregon coast, where he was on a goodwill tour for the team.

Oregon state police said Wednesday the autopsy was done by Dr. Larry Lewman, a state medical examiner, who concluded that Duckworth died of "hypertrophic cardiomyopathy with congestive heart failure."