/*Shawn Duffy*/ was warming up with the boys team on Aug. 14 when he suddenly got sick and collapsed. He died at a hospital a short time later.
He would have been a freshman at Quakertown High School this year.
Autopsy results were inconclusive right after the death. But Bucks County Coroner Joseph Campbell now says tests have shown Duffy had myocarditis, an inflammation of the heart muscle.
Campbell says the inflammation was probably caused by an intestinal virus the teen had prior to his death.
Information from: The Intelligencer, http://www.phillyburbs.com