Former offensive lineman Paul Duncan, who went to training camp with the Denver Broncos in 2010, died on July 15 at age 35, his wife, Ellen Duncan, confirmed in an Instagram post.

“Paul went into cardiac arrest while on a run in our neighborhood,” Ellen wrote on July 16. “Today he was pronounced brain dead. We will have a medical examination to understand cause of death.

“His body will be donated to people in need of organs and to medical research. Details on funeral arrangements to follow. Thank you for your prayers and support.”

Duncan played college football at Notre Dame from 2005-2009, playing in 12 games as a senior before entering the NFL draft. He went undrafted in 2010 and signed with the Broncos as a college free agent.

Duncan failed to make Denver’s 53-man roster and he didn’t play in any regular season games in the NFL, but he did have a brief stint with the Broncos before retiring from football.

Notre Dame Football’s official Twitter account released the following statement last week:

Our prayers go out to the family and friends of Paul Duncan.

A great teammate, but more importantly a loving husband and father.

Duncan is survived by his wife Ellen, and their two daughters: Dillon, 6, and Sloane, 4.