A man died while participating in Sunday’s 9th Annual Escape the Cape Triathlon and Open Water Classic, officials confirmed to NJ Advance Media. The man, a Wilmington, Delaware resident who was more than 70 years old, was taking part in the swimming portion of the event at about 8:30 a.m. Sunday when he went into “apparent cardiac arrest,” authorities said. “The athlete had nearly completed this classic race portion of the Escape the Cape Triathlon when he was spotted in distress by lifeguards near the swim finish,” said James E. Salmon, a spokesman with the Delaware River and Bay Authority. T…