Keli McGregor, the former president of the Colorado Rockies, died from a virus that attacked his heart.

The family said McGregor, who was 48, likely contracted the virus in the last week of his life, causing lymphocytic myocarditis that led to his death on April 20 while on a business trip in Salt Lake City.

The family said the organism infiltrated his heart and disrupted the electrical pathways that signal the heart to beat properly. McGregor was an advocate for early detection and prevention of cardiovascular disease and had frequent checkups, the family said.

We have a friend who suffered from this and almost died. At one point, doctors thought they would need to perform a heart transplant, but he bounced back.